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 | ||
b5968725 TH |
38 | #include "../nfs4session.h" |
39 | #include "../internal.h" | |
40 | #include "../delegation.h" | |
41 | #include "filelayout.h" | |
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 | ||
d45f60c6 | 87 | static void filelayout_reset_write(struct nfs_pgio_header *hdr) |
e7dd79af | 88 | { |
d45f60c6 | 89 | struct rpc_task *task = &hdr->task; |
e7dd79af AA |
90 | |
91 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) { | |
92 | dprintk("%s Reset task %5u for i/o through MDS " | |
1e8968c5 | 93 | "(req %s/%llu, %u bytes @ offset %llu)\n", __func__, |
d45f60c6 | 94 | hdr->task.tk_pid, |
497826af | 95 | hdr->inode->i_sb->s_id, |
1e8968c5 | 96 | (unsigned long long)NFS_FILEID(hdr->inode), |
d45f60c6 WAA |
97 | hdr->args.count, |
98 | (unsigned long long)hdr->args.offset); | |
e7dd79af | 99 | |
53113ad3 | 100 | task->tk_status = pnfs_write_done_resend_to_mds(hdr); |
e7dd79af AA |
101 | } |
102 | } | |
103 | ||
d45f60c6 | 104 | static void filelayout_reset_read(struct nfs_pgio_header *hdr) |
e7dd79af | 105 | { |
d45f60c6 | 106 | struct rpc_task *task = &hdr->task; |
e7dd79af AA |
107 | |
108 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) { | |
109 | dprintk("%s Reset task %5u for i/o through MDS " | |
1e8968c5 | 110 | "(req %s/%llu, %u bytes @ offset %llu)\n", __func__, |
d45f60c6 | 111 | hdr->task.tk_pid, |
497826af | 112 | hdr->inode->i_sb->s_id, |
1e8968c5 | 113 | (unsigned long long)NFS_FILEID(hdr->inode), |
d45f60c6 WAA |
114 | hdr->args.count, |
115 | (unsigned long long)hdr->args.offset); | |
e7dd79af | 116 | |
53113ad3 | 117 | task->tk_status = pnfs_read_done_resend_to_mds(hdr); |
e7dd79af AA |
118 | } |
119 | } | |
120 | ||
d527e5c1 TM |
121 | static void filelayout_fenceme(struct inode *inode, struct pnfs_layout_hdr *lo) |
122 | { | |
123 | if (!test_and_clear_bit(NFS_LAYOUT_RETURN, &lo->plh_flags)) | |
124 | return; | |
d527e5c1 TM |
125 | pnfs_return_layout(inode); |
126 | } | |
127 | ||
cbdabc7f AA |
128 | static int filelayout_async_handle_error(struct rpc_task *task, |
129 | struct nfs4_state *state, | |
130 | struct nfs_client *clp, | |
e7dd79af | 131 | struct pnfs_layout_segment *lseg) |
cbdabc7f | 132 | { |
d527e5c1 TM |
133 | struct pnfs_layout_hdr *lo = lseg->pls_layout; |
134 | struct inode *inode = lo->plh_inode; | |
e7dd79af AA |
135 | struct nfs_server *mds_server = NFS_SERVER(inode); |
136 | struct nfs4_deviceid_node *devid = FILELAYOUT_DEVID_NODE(lseg); | |
9cb81968 | 137 | struct nfs_client *mds_client = mds_server->nfs_client; |
671fb896 | 138 | struct nfs4_slot_table *tbl = &clp->cl_session->fc_slot_table; |
9cb81968 | 139 | |
cbdabc7f AA |
140 | if (task->tk_status >= 0) |
141 | return 0; | |
cbdabc7f AA |
142 | |
143 | switch (task->tk_status) { | |
9cb81968 AA |
144 | /* MDS state errors */ |
145 | case -NFS4ERR_DELEG_REVOKED: | |
146 | case -NFS4ERR_ADMIN_REVOKED: | |
147 | case -NFS4ERR_BAD_STATEID: | |
9cb81968 | 148 | case -NFS4ERR_OPENMODE: |
e7dd79af AA |
149 | if (state == NULL) |
150 | break; | |
5d422301 TM |
151 | if (nfs4_schedule_stateid_recovery(mds_server, state) < 0) |
152 | goto out_bad_stateid; | |
9cb81968 AA |
153 | goto wait_on_recovery; |
154 | case -NFS4ERR_EXPIRED: | |
5d422301 TM |
155 | if (state != NULL) { |
156 | if (nfs4_schedule_stateid_recovery(mds_server, state) < 0) | |
157 | goto out_bad_stateid; | |
158 | } | |
9cb81968 AA |
159 | nfs4_schedule_lease_recovery(mds_client); |
160 | goto wait_on_recovery; | |
161 | /* DS session errors */ | |
cbdabc7f AA |
162 | case -NFS4ERR_BADSESSION: |
163 | case -NFS4ERR_BADSLOT: | |
164 | case -NFS4ERR_BAD_HIGH_SLOT: | |
165 | case -NFS4ERR_DEADSESSION: | |
166 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
167 | case -NFS4ERR_SEQ_FALSE_RETRY: | |
168 | case -NFS4ERR_SEQ_MISORDERED: | |
169 | dprintk("%s ERROR %d, Reset session. Exchangeid " | |
170 | "flags 0x%x\n", __func__, task->tk_status, | |
171 | clp->cl_exchange_flags); | |
9f594791 | 172 | nfs4_schedule_session_recovery(clp->cl_session, task->tk_status); |
cbdabc7f AA |
173 | break; |
174 | case -NFS4ERR_DELAY: | |
175 | case -NFS4ERR_GRACE: | |
cbdabc7f AA |
176 | rpc_delay(task, FILELAYOUT_POLL_RETRY_MAX); |
177 | break; | |
a8a4ae3a AA |
178 | case -NFS4ERR_RETRY_UNCACHED_REP: |
179 | break; | |
041245c8 AA |
180 | /* Invalidate Layout errors */ |
181 | case -NFS4ERR_PNFS_NO_LAYOUT: | |
182 | case -ESTALE: /* mapped NFS4ERR_STALE */ | |
183 | case -EBADHANDLE: /* mapped NFS4ERR_BADHANDLE */ | |
184 | case -EISDIR: /* mapped NFS4ERR_ISDIR */ | |
185 | case -NFS4ERR_FHEXPIRED: | |
186 | case -NFS4ERR_WRONG_TYPE: | |
187 | dprintk("%s Invalid layout error %d\n", __func__, | |
188 | task->tk_status); | |
189 | /* | |
190 | * Destroy layout so new i/o will get a new layout. | |
191 | * Layout will not be destroyed until all current lseg | |
192 | * references are put. Mark layout as invalid to resend failed | |
193 | * i/o and all i/o waiting on the slot table to the MDS until | |
194 | * layout is destroyed and a new valid layout is obtained. | |
195 | */ | |
d42e7873 | 196 | pnfs_destroy_layout(NFS_I(inode)); |
041245c8 AA |
197 | rpc_wake_up(&tbl->slot_tbl_waitq); |
198 | goto reset; | |
e7dd79af AA |
199 | /* RPC connection errors */ |
200 | case -ECONNREFUSED: | |
201 | case -EHOSTDOWN: | |
202 | case -EHOSTUNREACH: | |
203 | case -ENETUNREACH: | |
204 | case -EIO: | |
205 | case -ETIMEDOUT: | |
206 | case -EPIPE: | |
207 | dprintk("%s DS connection error %d\n", __func__, | |
208 | task->tk_status); | |
1dfed273 | 209 | nfs4_mark_deviceid_unavailable(devid); |
d527e5c1 | 210 | set_bit(NFS_LAYOUT_RETURN, &lo->plh_flags); |
671fb896 | 211 | rpc_wake_up(&tbl->slot_tbl_waitq); |
e7dd79af | 212 | /* fall through */ |
cbdabc7f | 213 | default: |
041245c8 | 214 | reset: |
e7dd79af | 215 | dprintk("%s Retry through MDS. Error %d\n", __func__, |
cbdabc7f | 216 | task->tk_status); |
e7dd79af | 217 | return -NFS4ERR_RESET_TO_MDS; |
cbdabc7f | 218 | } |
9cb81968 | 219 | out: |
cbdabc7f AA |
220 | task->tk_status = 0; |
221 | return -EAGAIN; | |
5d422301 TM |
222 | out_bad_stateid: |
223 | task->tk_status = -EIO; | |
224 | return 0; | |
9cb81968 AA |
225 | wait_on_recovery: |
226 | rpc_sleep_on(&mds_client->cl_rpcwaitq, task, NULL); | |
227 | if (test_bit(NFS4CLNT_MANAGER_RUNNING, &mds_client->cl_state) == 0) | |
228 | rpc_wake_up_queued_task(&mds_client->cl_rpcwaitq, task); | |
229 | goto out; | |
cbdabc7f AA |
230 | } |
231 | ||
232 | /* NFS_PROTO call done callback routines */ | |
233 | ||
234 | static int filelayout_read_done_cb(struct rpc_task *task, | |
d45f60c6 | 235 | struct nfs_pgio_header *hdr) |
cbdabc7f | 236 | { |
e7dd79af | 237 | int err; |
cbdabc7f | 238 | |
d45f60c6 WAA |
239 | trace_nfs4_pnfs_read(hdr, task->tk_status); |
240 | err = filelayout_async_handle_error(task, hdr->args.context->state, | |
241 | hdr->ds_clp, hdr->lseg); | |
cbdabc7f | 242 | |
e7dd79af AA |
243 | switch (err) { |
244 | case -NFS4ERR_RESET_TO_MDS: | |
d45f60c6 | 245 | filelayout_reset_read(hdr); |
e7dd79af AA |
246 | return task->tk_status; |
247 | case -EAGAIN: | |
d00c5d43 | 248 | rpc_restart_call_prepare(task); |
cbdabc7f AA |
249 | return -EAGAIN; |
250 | } | |
251 | ||
252 | return 0; | |
253 | } | |
254 | ||
863a3c6c AA |
255 | /* |
256 | * We reference the rpc_cred of the first WRITE that triggers the need for | |
257 | * a LAYOUTCOMMIT, and use it to send the layoutcommit compound. | |
258 | * rfc5661 is not clear about which credential should be used. | |
259 | */ | |
260 | static void | |
d45f60c6 | 261 | filelayout_set_layoutcommit(struct nfs_pgio_header *hdr) |
863a3c6c | 262 | { |
cd841605 FI |
263 | |
264 | if (FILELAYOUT_LSEG(hdr->lseg)->commit_through_mds || | |
bc7d4b8f | 265 | hdr->res.verf->committed != NFS_DATA_SYNC) |
863a3c6c AA |
266 | return; |
267 | ||
d45f60c6 | 268 | pnfs_set_layoutcommit(hdr); |
f383b7e8 | 269 | dprintk("%s inode %lu pls_end_pos %lu\n", __func__, hdr->inode->i_ino, |
cd841605 | 270 | (unsigned long) NFS_I(hdr->inode)->layout->plh_lwb); |
863a3c6c AA |
271 | } |
272 | ||
1dfed273 TM |
273 | bool |
274 | filelayout_test_devid_unavailable(struct nfs4_deviceid_node *node) | |
275 | { | |
276 | return filelayout_test_devid_invalid(node) || | |
277 | nfs4_test_deviceid_unavailable(node); | |
278 | } | |
279 | ||
280 | static bool | |
281 | filelayout_reset_to_mds(struct pnfs_layout_segment *lseg) | |
282 | { | |
283 | struct nfs4_deviceid_node *node = FILELAYOUT_DEVID_NODE(lseg); | |
284 | ||
8006bfba | 285 | return filelayout_test_devid_unavailable(node); |
1dfed273 TM |
286 | } |
287 | ||
dc70d7b3 AA |
288 | /* |
289 | * Call ops for the async read/write cases | |
290 | * In the case of dense layouts, the offset needs to be reset to its | |
291 | * original value. | |
292 | */ | |
293 | static void filelayout_read_prepare(struct rpc_task *task, void *data) | |
294 | { | |
d45f60c6 | 295 | struct nfs_pgio_header *hdr = data; |
dc70d7b3 | 296 | |
d45f60c6 | 297 | if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags))) { |
c58c8441 TM |
298 | rpc_exit(task, -EIO); |
299 | return; | |
300 | } | |
d45f60c6 | 301 | if (filelayout_reset_to_mds(hdr->lseg)) { |
0ad2f378 | 302 | dprintk("%s task %u reset io to MDS\n", __func__, task->tk_pid); |
d45f60c6 | 303 | filelayout_reset_read(hdr); |
0ad2f378 AA |
304 | rpc_exit(task, 0); |
305 | return; | |
306 | } | |
d45f60c6 | 307 | hdr->pgio_done_cb = filelayout_read_done_cb; |
cbdabc7f | 308 | |
d45f60c6 WAA |
309 | if (nfs41_setup_sequence(hdr->ds_clp->cl_session, |
310 | &hdr->args.seq_args, | |
311 | &hdr->res.seq_res, | |
9b206149 TM |
312 | task)) |
313 | return; | |
d45f60c6 WAA |
314 | if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context, |
315 | hdr->args.lock_context, FMODE_READ) == -EIO) | |
869a9d37 | 316 | rpc_exit(task, -EIO); /* lost lock, terminate I/O */ |
dc70d7b3 AA |
317 | } |
318 | ||
319 | static void filelayout_read_call_done(struct rpc_task *task, void *data) | |
320 | { | |
d45f60c6 | 321 | struct nfs_pgio_header *hdr = data; |
dc70d7b3 AA |
322 | |
323 | dprintk("--> %s task->tk_status %d\n", __func__, task->tk_status); | |
324 | ||
d45f60c6 | 325 | if (test_bit(NFS_IOHDR_REDO, &hdr->flags) && |
f9c96fcc | 326 | task->tk_status == 0) { |
d45f60c6 | 327 | nfs41_sequence_done(task, &hdr->res.seq_res); |
0ad2f378 | 328 | return; |
f9c96fcc | 329 | } |
0ad2f378 | 330 | |
dc70d7b3 | 331 | /* Note this may cause RPC to be resent */ |
d45f60c6 | 332 | hdr->mds_ops->rpc_call_done(task, data); |
dc70d7b3 AA |
333 | } |
334 | ||
0a702195 WAA |
335 | static void filelayout_read_count_stats(struct rpc_task *task, void *data) |
336 | { | |
d45f60c6 | 337 | struct nfs_pgio_header *hdr = data; |
0a702195 | 338 | |
d45f60c6 | 339 | rpc_count_iostats(task, NFS_SERVER(hdr->inode)->client->cl_metrics); |
0a702195 WAA |
340 | } |
341 | ||
dc70d7b3 AA |
342 | static void filelayout_read_release(void *data) |
343 | { | |
d45f60c6 WAA |
344 | struct nfs_pgio_header *hdr = data; |
345 | struct pnfs_layout_hdr *lo = hdr->lseg->pls_layout; | |
dc70d7b3 | 346 | |
d527e5c1 | 347 | filelayout_fenceme(lo->plh_inode, lo); |
d45f60c6 WAA |
348 | nfs_put_client(hdr->ds_clp); |
349 | hdr->mds_ops->rpc_release(data); | |
dc70d7b3 AA |
350 | } |
351 | ||
a69aef14 | 352 | static int filelayout_write_done_cb(struct rpc_task *task, |
d45f60c6 | 353 | struct nfs_pgio_header *hdr) |
a69aef14 | 354 | { |
e7dd79af AA |
355 | int err; |
356 | ||
d45f60c6 WAA |
357 | trace_nfs4_pnfs_write(hdr, task->tk_status); |
358 | err = filelayout_async_handle_error(task, hdr->args.context->state, | |
359 | hdr->ds_clp, hdr->lseg); | |
e7dd79af AA |
360 | |
361 | switch (err) { | |
362 | case -NFS4ERR_RESET_TO_MDS: | |
d45f60c6 | 363 | filelayout_reset_write(hdr); |
e7dd79af AA |
364 | return task->tk_status; |
365 | case -EAGAIN: | |
d00c5d43 | 366 | rpc_restart_call_prepare(task); |
a69aef14 FI |
367 | return -EAGAIN; |
368 | } | |
369 | ||
d45f60c6 | 370 | filelayout_set_layoutcommit(hdr); |
a69aef14 FI |
371 | return 0; |
372 | } | |
373 | ||
e0c2b380 | 374 | /* Fake up some data that will cause nfs_commit_release to retry the writes. */ |
0b7c0153 | 375 | static void prepare_to_resend_writes(struct nfs_commit_data *data) |
e0c2b380 FI |
376 | { |
377 | struct nfs_page *first = nfs_list_entry(data->pages.next); | |
378 | ||
379 | data->task.tk_status = 0; | |
2f2c63bc TM |
380 | memcpy(&data->verf.verifier, &first->wb_verf, |
381 | sizeof(data->verf.verifier)); | |
382 | data->verf.verifier.data[0]++; /* ensure verifier mismatch */ | |
e0c2b380 FI |
383 | } |
384 | ||
385 | static int filelayout_commit_done_cb(struct rpc_task *task, | |
0b7c0153 | 386 | struct nfs_commit_data *data) |
e0c2b380 | 387 | { |
e7dd79af AA |
388 | int err; |
389 | ||
cc668ab3 | 390 | trace_nfs4_pnfs_commit_ds(data, task->tk_status); |
e7dd79af AA |
391 | err = filelayout_async_handle_error(task, NULL, data->ds_clp, |
392 | data->lseg); | |
393 | ||
394 | switch (err) { | |
395 | case -NFS4ERR_RESET_TO_MDS: | |
396 | prepare_to_resend_writes(data); | |
397 | return -EAGAIN; | |
398 | case -EAGAIN: | |
399 | rpc_restart_call_prepare(task); | |
e0c2b380 FI |
400 | return -EAGAIN; |
401 | } | |
402 | ||
bc7d4b8f PT |
403 | if (data->verf.committed == NFS_UNSTABLE) |
404 | pnfs_commit_set_layoutcommit(data); | |
405 | ||
e0c2b380 FI |
406 | return 0; |
407 | } | |
408 | ||
a69aef14 FI |
409 | static void filelayout_write_prepare(struct rpc_task *task, void *data) |
410 | { | |
d45f60c6 | 411 | struct nfs_pgio_header *hdr = data; |
a69aef14 | 412 | |
d45f60c6 | 413 | if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags))) { |
c58c8441 TM |
414 | rpc_exit(task, -EIO); |
415 | return; | |
416 | } | |
d45f60c6 | 417 | if (filelayout_reset_to_mds(hdr->lseg)) { |
0ad2f378 | 418 | dprintk("%s task %u reset io to MDS\n", __func__, task->tk_pid); |
d45f60c6 | 419 | filelayout_reset_write(hdr); |
0ad2f378 AA |
420 | rpc_exit(task, 0); |
421 | return; | |
422 | } | |
d45f60c6 WAA |
423 | if (nfs41_setup_sequence(hdr->ds_clp->cl_session, |
424 | &hdr->args.seq_args, | |
425 | &hdr->res.seq_res, | |
9b206149 TM |
426 | task)) |
427 | return; | |
d45f60c6 WAA |
428 | if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context, |
429 | hdr->args.lock_context, FMODE_WRITE) == -EIO) | |
869a9d37 | 430 | rpc_exit(task, -EIO); /* lost lock, terminate I/O */ |
a69aef14 FI |
431 | } |
432 | ||
433 | static void filelayout_write_call_done(struct rpc_task *task, void *data) | |
434 | { | |
d45f60c6 | 435 | struct nfs_pgio_header *hdr = data; |
a69aef14 | 436 | |
d45f60c6 | 437 | if (test_bit(NFS_IOHDR_REDO, &hdr->flags) && |
f9c96fcc | 438 | task->tk_status == 0) { |
d45f60c6 | 439 | nfs41_sequence_done(task, &hdr->res.seq_res); |
0ad2f378 | 440 | return; |
f9c96fcc | 441 | } |
0ad2f378 | 442 | |
a69aef14 | 443 | /* Note this may cause RPC to be resent */ |
d45f60c6 | 444 | hdr->mds_ops->rpc_call_done(task, data); |
a69aef14 FI |
445 | } |
446 | ||
0a702195 WAA |
447 | static void filelayout_write_count_stats(struct rpc_task *task, void *data) |
448 | { | |
d45f60c6 | 449 | struct nfs_pgio_header *hdr = data; |
0a702195 | 450 | |
d45f60c6 | 451 | rpc_count_iostats(task, NFS_SERVER(hdr->inode)->client->cl_metrics); |
0a702195 WAA |
452 | } |
453 | ||
a69aef14 FI |
454 | static void filelayout_write_release(void *data) |
455 | { | |
d45f60c6 WAA |
456 | struct nfs_pgio_header *hdr = data; |
457 | struct pnfs_layout_hdr *lo = hdr->lseg->pls_layout; | |
a69aef14 | 458 | |
d527e5c1 | 459 | filelayout_fenceme(lo->plh_inode, lo); |
d45f60c6 WAA |
460 | nfs_put_client(hdr->ds_clp); |
461 | hdr->mds_ops->rpc_release(data); | |
a69aef14 FI |
462 | } |
463 | ||
0b7c0153 | 464 | static void filelayout_commit_prepare(struct rpc_task *task, void *data) |
e0c2b380 | 465 | { |
0b7c0153 | 466 | struct nfs_commit_data *wdata = data; |
e0c2b380 | 467 | |
d9afbd1b TM |
468 | nfs41_setup_sequence(wdata->ds_clp->cl_session, |
469 | &wdata->args.seq_args, | |
470 | &wdata->res.seq_res, | |
471 | task); | |
0b7c0153 FI |
472 | } |
473 | ||
474 | static void filelayout_write_commit_done(struct rpc_task *task, void *data) | |
475 | { | |
476 | struct nfs_commit_data *wdata = data; | |
477 | ||
478 | /* Note this may cause RPC to be resent */ | |
479 | wdata->mds_ops->rpc_call_done(task, data); | |
480 | } | |
481 | ||
482 | static void filelayout_commit_count_stats(struct rpc_task *task, void *data) | |
483 | { | |
484 | struct nfs_commit_data *cdata = data; | |
485 | ||
486 | rpc_count_iostats(task, NFS_SERVER(cdata->inode)->client->cl_metrics); | |
487 | } | |
488 | ||
489 | static void filelayout_commit_release(void *calldata) | |
490 | { | |
491 | struct nfs_commit_data *data = calldata; | |
492 | ||
f453a54a | 493 | data->completion_ops->completion(data); |
9369a431 | 494 | pnfs_put_lseg(data->lseg); |
3a7936c3 | 495 | nfs_put_client(data->ds_clp); |
0b7c0153 | 496 | nfs_commitdata_release(data); |
e0c2b380 FI |
497 | } |
498 | ||
17280175 | 499 | static const struct rpc_call_ops filelayout_read_call_ops = { |
dc70d7b3 AA |
500 | .rpc_call_prepare = filelayout_read_prepare, |
501 | .rpc_call_done = filelayout_read_call_done, | |
0a702195 | 502 | .rpc_count_stats = filelayout_read_count_stats, |
dc70d7b3 AA |
503 | .rpc_release = filelayout_read_release, |
504 | }; | |
505 | ||
17280175 | 506 | static const struct rpc_call_ops filelayout_write_call_ops = { |
a69aef14 FI |
507 | .rpc_call_prepare = filelayout_write_prepare, |
508 | .rpc_call_done = filelayout_write_call_done, | |
0a702195 | 509 | .rpc_count_stats = filelayout_write_count_stats, |
a69aef14 FI |
510 | .rpc_release = filelayout_write_release, |
511 | }; | |
512 | ||
17280175 | 513 | static const struct rpc_call_ops filelayout_commit_call_ops = { |
0b7c0153 FI |
514 | .rpc_call_prepare = filelayout_commit_prepare, |
515 | .rpc_call_done = filelayout_write_commit_done, | |
516 | .rpc_count_stats = filelayout_commit_count_stats, | |
e0c2b380 FI |
517 | .rpc_release = filelayout_commit_release, |
518 | }; | |
519 | ||
dc70d7b3 | 520 | static enum pnfs_try_status |
d45f60c6 | 521 | filelayout_read_pagelist(struct nfs_pgio_header *hdr) |
dc70d7b3 | 522 | { |
cd841605 | 523 | struct pnfs_layout_segment *lseg = hdr->lseg; |
dc70d7b3 | 524 | struct nfs4_pnfs_ds *ds; |
0e20162e | 525 | struct rpc_clnt *ds_clnt; |
d45f60c6 | 526 | loff_t offset = hdr->args.offset; |
dc70d7b3 AA |
527 | u32 j, idx; |
528 | struct nfs_fh *fh; | |
dc70d7b3 AA |
529 | |
530 | dprintk("--> %s ino %lu pgbase %u req %Zu@%llu\n", | |
cd841605 | 531 | __func__, hdr->inode->i_ino, |
d45f60c6 | 532 | hdr->args.pgbase, (size_t)hdr->args.count, offset); |
dc70d7b3 AA |
533 | |
534 | /* Retrieve the correct rpc_client for the byte range */ | |
535 | j = nfs4_fl_calc_j_index(lseg, offset); | |
536 | idx = nfs4_fl_calc_ds_index(lseg, j); | |
537 | ds = nfs4_fl_prepare_ds(lseg, idx); | |
90fecfcb | 538 | if (!ds) |
dc70d7b3 | 539 | return PNFS_NOT_ATTEMPTED; |
0e20162e AA |
540 | |
541 | ds_clnt = nfs4_find_or_create_ds_client(ds->ds_clp, hdr->inode); | |
542 | if (IS_ERR(ds_clnt)) | |
543 | return PNFS_NOT_ATTEMPTED; | |
544 | ||
3a7936c3 AA |
545 | dprintk("%s USE DS: %s cl_count %d\n", __func__, |
546 | ds->ds_remotestr, atomic_read(&ds->ds_clp->cl_count)); | |
dc70d7b3 AA |
547 | |
548 | /* No multipath support. Use first DS */ | |
3a7936c3 | 549 | atomic_inc(&ds->ds_clp->cl_count); |
d45f60c6 WAA |
550 | hdr->ds_clp = ds->ds_clp; |
551 | hdr->ds_idx = idx; | |
dc70d7b3 AA |
552 | fh = nfs4_fl_select_ds_fh(lseg, j); |
553 | if (fh) | |
d45f60c6 | 554 | hdr->args.fh = fh; |
dc70d7b3 | 555 | |
d45f60c6 WAA |
556 | hdr->args.offset = filelayout_get_dserver_offset(lseg, offset); |
557 | hdr->mds_offset = offset; | |
dc70d7b3 AA |
558 | |
559 | /* Perform an asynchronous read to ds */ | |
d45f60c6 | 560 | nfs_initiate_pgio(ds_clnt, hdr, |
1ed26f33 | 561 | &filelayout_read_call_ops, 0, RPC_TASK_SOFTCONN); |
dc70d7b3 AA |
562 | return PNFS_ATTEMPTED; |
563 | } | |
564 | ||
a69aef14 | 565 | /* Perform async writes. */ |
0382b744 | 566 | static enum pnfs_try_status |
d45f60c6 | 567 | filelayout_write_pagelist(struct nfs_pgio_header *hdr, int sync) |
0382b744 | 568 | { |
cd841605 | 569 | struct pnfs_layout_segment *lseg = hdr->lseg; |
a69aef14 | 570 | struct nfs4_pnfs_ds *ds; |
0e20162e | 571 | struct rpc_clnt *ds_clnt; |
d45f60c6 | 572 | loff_t offset = hdr->args.offset; |
a69aef14 FI |
573 | u32 j, idx; |
574 | struct nfs_fh *fh; | |
a69aef14 FI |
575 | |
576 | /* Retrieve the correct rpc_client for the byte range */ | |
577 | j = nfs4_fl_calc_j_index(lseg, offset); | |
578 | idx = nfs4_fl_calc_ds_index(lseg, j); | |
579 | ds = nfs4_fl_prepare_ds(lseg, idx); | |
90fecfcb | 580 | if (!ds) |
a69aef14 | 581 | return PNFS_NOT_ATTEMPTED; |
0e20162e AA |
582 | |
583 | ds_clnt = nfs4_find_or_create_ds_client(ds->ds_clp, hdr->inode); | |
584 | if (IS_ERR(ds_clnt)) | |
585 | return PNFS_NOT_ATTEMPTED; | |
586 | ||
3a7936c3 | 587 | dprintk("%s ino %lu sync %d req %Zu@%llu DS: %s cl_count %d\n", |
d45f60c6 | 588 | __func__, hdr->inode->i_ino, sync, (size_t) hdr->args.count, |
3a7936c3 | 589 | offset, ds->ds_remotestr, atomic_read(&ds->ds_clp->cl_count)); |
a69aef14 | 590 | |
d45f60c6 | 591 | hdr->pgio_done_cb = filelayout_write_done_cb; |
3a7936c3 | 592 | atomic_inc(&ds->ds_clp->cl_count); |
d45f60c6 WAA |
593 | hdr->ds_clp = ds->ds_clp; |
594 | hdr->ds_idx = idx; | |
a69aef14 FI |
595 | fh = nfs4_fl_select_ds_fh(lseg, j); |
596 | if (fh) | |
d45f60c6 WAA |
597 | hdr->args.fh = fh; |
598 | hdr->args.offset = filelayout_get_dserver_offset(lseg, offset); | |
a69aef14 FI |
599 | |
600 | /* Perform an asynchronous write */ | |
d45f60c6 | 601 | nfs_initiate_pgio(ds_clnt, hdr, |
9f0ec176 AA |
602 | &filelayout_write_call_ops, sync, |
603 | RPC_TASK_SOFTCONN); | |
a69aef14 | 604 | return PNFS_ATTEMPTED; |
0382b744 AA |
605 | } |
606 | ||
16b374ca AA |
607 | /* |
608 | * filelayout_check_layout() | |
609 | * | |
610 | * Make sure layout segment parameters are sane WRT the device. | |
611 | * At this point no generic layer initialization of the lseg has occurred, | |
612 | * and nothing has been added to the layout_hdr cache. | |
613 | * | |
614 | */ | |
615 | static int | |
616 | filelayout_check_layout(struct pnfs_layout_hdr *lo, | |
617 | struct nfs4_filelayout_segment *fl, | |
618 | struct nfs4_layoutget_res *lgr, | |
a75b9df9 TM |
619 | struct nfs4_deviceid *id, |
620 | gfp_t gfp_flags) | |
16b374ca | 621 | { |
a1eaecbc | 622 | struct nfs4_deviceid_node *d; |
16b374ca AA |
623 | struct nfs4_file_layout_dsaddr *dsaddr; |
624 | int status = -EINVAL; | |
16b374ca AA |
625 | |
626 | dprintk("--> %s\n", __func__); | |
627 | ||
7c24d948 AA |
628 | /* FIXME: remove this check when layout segment support is added */ |
629 | if (lgr->range.offset != 0 || | |
630 | lgr->range.length != NFS4_MAX_UINT64) { | |
631 | dprintk("%s Only whole file layouts supported. Use MDS i/o\n", | |
632 | __func__); | |
633 | goto out; | |
634 | } | |
635 | ||
16b374ca | 636 | if (fl->pattern_offset > lgr->range.offset) { |
3b6445a6 | 637 | dprintk("%s pattern_offset %lld too large\n", |
16b374ca AA |
638 | __func__, fl->pattern_offset); |
639 | goto out; | |
640 | } | |
641 | ||
c6194271 | 642 | if (!fl->stripe_unit) { |
75247aff | 643 | dprintk("%s Invalid stripe unit (%u)\n", |
16b374ca AA |
644 | __func__, fl->stripe_unit); |
645 | goto out; | |
646 | } | |
647 | ||
648 | /* find and reference the deviceid */ | |
661373b1 CH |
649 | d = nfs4_find_get_deviceid(NFS_SERVER(lo->plh_inode), id, |
650 | lo->plh_lc_cred, gfp_flags); | |
651 | if (d == NULL) | |
652 | goto out; | |
653 | ||
654 | dsaddr = container_of(d, struct nfs4_file_layout_dsaddr, id_node); | |
1dfed273 TM |
655 | /* Found deviceid is unavailable */ |
656 | if (filelayout_test_devid_unavailable(&dsaddr->id_node)) | |
661373b1 | 657 | goto out_put; |
c47abcf8 | 658 | |
16b374ca AA |
659 | fl->dsaddr = dsaddr; |
660 | ||
e414966b CL |
661 | if (fl->first_stripe_index >= dsaddr->stripe_count) { |
662 | dprintk("%s Bad first_stripe_index %u\n", | |
16b374ca AA |
663 | __func__, fl->first_stripe_index); |
664 | goto out_put; | |
665 | } | |
666 | ||
667 | if ((fl->stripe_type == STRIPE_SPARSE && | |
668 | fl->num_fh > 1 && fl->num_fh != dsaddr->ds_num) || | |
669 | (fl->stripe_type == STRIPE_DENSE && | |
670 | fl->num_fh != dsaddr->stripe_count)) { | |
671 | dprintk("%s num_fh %u not valid for given packing\n", | |
672 | __func__, fl->num_fh); | |
673 | goto out_put; | |
674 | } | |
675 | ||
16b374ca AA |
676 | status = 0; |
677 | out: | |
678 | dprintk("--> %s returns %d\n", __func__, status); | |
679 | return status; | |
680 | out_put: | |
ea8eecdd | 681 | nfs4_fl_put_deviceid(dsaddr); |
16b374ca AA |
682 | goto out; |
683 | } | |
684 | ||
685 | static void filelayout_free_fh_array(struct nfs4_filelayout_segment *fl) | |
686 | { | |
687 | int i; | |
688 | ||
689 | for (i = 0; i < fl->num_fh; i++) { | |
690 | if (!fl->fh_array[i]) | |
691 | break; | |
692 | kfree(fl->fh_array[i]); | |
693 | } | |
694 | kfree(fl->fh_array); | |
695 | fl->fh_array = NULL; | |
696 | } | |
697 | ||
698 | static void | |
699 | _filelayout_free_lseg(struct nfs4_filelayout_segment *fl) | |
700 | { | |
701 | filelayout_free_fh_array(fl); | |
702 | kfree(fl); | |
703 | } | |
704 | ||
705 | static int | |
706 | filelayout_decode_layout(struct pnfs_layout_hdr *flo, | |
707 | struct nfs4_filelayout_segment *fl, | |
708 | struct nfs4_layoutget_res *lgr, | |
a75b9df9 TM |
709 | struct nfs4_deviceid *id, |
710 | gfp_t gfp_flags) | |
16b374ca | 711 | { |
35124a09 | 712 | struct xdr_stream stream; |
f7da7a12 | 713 | struct xdr_buf buf; |
35124a09 WAA |
714 | struct page *scratch; |
715 | __be32 *p; | |
16b374ca AA |
716 | uint32_t nfl_util; |
717 | int i; | |
718 | ||
719 | dprintk("%s: set_layout_map Begin\n", __func__); | |
720 | ||
a75b9df9 | 721 | scratch = alloc_page(gfp_flags); |
35124a09 WAA |
722 | if (!scratch) |
723 | return -ENOMEM; | |
724 | ||
f7da7a12 | 725 | xdr_init_decode_pages(&stream, &buf, lgr->layoutp->pages, lgr->layoutp->len); |
35124a09 WAA |
726 | xdr_set_scratch_buffer(&stream, page_address(scratch), PAGE_SIZE); |
727 | ||
728 | /* 20 = ufl_util (4), first_stripe_index (4), pattern_offset (8), | |
729 | * num_fh (4) */ | |
730 | p = xdr_inline_decode(&stream, NFS4_DEVICEID4_SIZE + 20); | |
731 | if (unlikely(!p)) | |
732 | goto out_err; | |
733 | ||
16b374ca AA |
734 | memcpy(id, p, sizeof(*id)); |
735 | p += XDR_QUADLEN(NFS4_DEVICEID4_SIZE); | |
a1eaecbc | 736 | nfs4_print_deviceid(id); |
16b374ca AA |
737 | |
738 | nfl_util = be32_to_cpup(p++); | |
739 | if (nfl_util & NFL4_UFLG_COMMIT_THRU_MDS) | |
740 | fl->commit_through_mds = 1; | |
741 | if (nfl_util & NFL4_UFLG_DENSE) | |
742 | fl->stripe_type = STRIPE_DENSE; | |
743 | else | |
744 | fl->stripe_type = STRIPE_SPARSE; | |
745 | fl->stripe_unit = nfl_util & ~NFL4_UFLG_MASK; | |
746 | ||
747 | fl->first_stripe_index = be32_to_cpup(p++); | |
748 | p = xdr_decode_hyper(p, &fl->pattern_offset); | |
749 | fl->num_fh = be32_to_cpup(p++); | |
750 | ||
751 | dprintk("%s: nfl_util 0x%X num_fh %u fsi %u po %llu\n", | |
752 | __func__, nfl_util, fl->num_fh, fl->first_stripe_index, | |
753 | fl->pattern_offset); | |
754 | ||
cec765cf AA |
755 | /* Note that a zero value for num_fh is legal for STRIPE_SPARSE. |
756 | * Futher checking is done in filelayout_check_layout */ | |
e414966b | 757 | if (fl->num_fh > |
cec765cf | 758 | max(NFS4_PNFS_MAX_STRIPE_CNT, NFS4_PNFS_MAX_MULTI_CNT)) |
35124a09 WAA |
759 | goto out_err; |
760 | ||
cec765cf | 761 | if (fl->num_fh > 0) { |
1813badd | 762 | fl->fh_array = kcalloc(fl->num_fh, sizeof(fl->fh_array[0]), |
cec765cf AA |
763 | gfp_flags); |
764 | if (!fl->fh_array) | |
765 | goto out_err; | |
766 | } | |
16b374ca AA |
767 | |
768 | for (i = 0; i < fl->num_fh; i++) { | |
769 | /* Do we want to use a mempool here? */ | |
a75b9df9 | 770 | fl->fh_array[i] = kmalloc(sizeof(struct nfs_fh), gfp_flags); |
35124a09 WAA |
771 | if (!fl->fh_array[i]) |
772 | goto out_err_free; | |
773 | ||
774 | p = xdr_inline_decode(&stream, 4); | |
775 | if (unlikely(!p)) | |
776 | goto out_err_free; | |
16b374ca AA |
777 | fl->fh_array[i]->size = be32_to_cpup(p++); |
778 | if (sizeof(struct nfs_fh) < fl->fh_array[i]->size) { | |
f9fd2d9c | 779 | printk(KERN_ERR "NFS: Too big fh %d received %d\n", |
16b374ca | 780 | i, fl->fh_array[i]->size); |
35124a09 | 781 | goto out_err_free; |
16b374ca | 782 | } |
35124a09 WAA |
783 | |
784 | p = xdr_inline_decode(&stream, fl->fh_array[i]->size); | |
785 | if (unlikely(!p)) | |
786 | goto out_err_free; | |
16b374ca | 787 | memcpy(fl->fh_array[i]->data, p, fl->fh_array[i]->size); |
16b374ca AA |
788 | dprintk("DEBUG: %s: fh len %d\n", __func__, |
789 | fl->fh_array[i]->size); | |
790 | } | |
791 | ||
35124a09 | 792 | __free_page(scratch); |
16b374ca | 793 | return 0; |
35124a09 WAA |
794 | |
795 | out_err_free: | |
796 | filelayout_free_fh_array(fl); | |
797 | out_err: | |
798 | __free_page(scratch); | |
799 | return -EIO; | |
16b374ca AA |
800 | } |
801 | ||
c879513e FI |
802 | static void |
803 | filelayout_free_lseg(struct pnfs_layout_segment *lseg) | |
804 | { | |
805 | struct nfs4_filelayout_segment *fl = FILELAYOUT_LSEG(lseg); | |
806 | ||
807 | dprintk("--> %s\n", __func__); | |
808 | nfs4_fl_put_deviceid(fl->dsaddr); | |
799ba8d5 FI |
809 | /* This assumes a single RW lseg */ |
810 | if (lseg->pls_range.iomode == IOMODE_RW) { | |
811 | struct nfs4_filelayout *flo; | |
812 | ||
813 | flo = FILELAYOUT_FROM_HDR(lseg->pls_layout); | |
814 | flo->commit_info.nbuckets = 0; | |
815 | kfree(flo->commit_info.buckets); | |
816 | flo->commit_info.buckets = NULL; | |
817 | } | |
c879513e FI |
818 | _filelayout_free_lseg(fl); |
819 | } | |
820 | ||
799ba8d5 FI |
821 | static int |
822 | filelayout_alloc_commit_info(struct pnfs_layout_segment *lseg, | |
ea2cf228 | 823 | struct nfs_commit_info *cinfo, |
799ba8d5 FI |
824 | gfp_t gfp_flags) |
825 | { | |
826 | struct nfs4_filelayout_segment *fl = FILELAYOUT_LSEG(lseg); | |
ea2cf228 | 827 | struct pnfs_commit_bucket *buckets; |
dd7663e7 | 828 | int size, i; |
799ba8d5 FI |
829 | |
830 | if (fl->commit_through_mds) | |
831 | return 0; | |
dd7663e7 WAA |
832 | |
833 | size = (fl->stripe_type == STRIPE_SPARSE) ? | |
834 | fl->dsaddr->ds_num : fl->dsaddr->stripe_count; | |
835 | ||
836 | if (cinfo->ds->nbuckets >= size) { | |
799ba8d5 FI |
837 | /* This assumes there is only one IOMODE_RW lseg. What |
838 | * we really want to do is have a layout_hdr level | |
839 | * dictionary of <multipath_list4, fh> keys, each | |
840 | * associated with a struct list_head, populated by calls | |
841 | * to filelayout_write_pagelist(). | |
842 | * */ | |
843 | return 0; | |
844 | } | |
845 | ||
ea2cf228 | 846 | buckets = kcalloc(size, sizeof(struct pnfs_commit_bucket), |
799ba8d5 FI |
847 | gfp_flags); |
848 | if (!buckets) | |
849 | return -ENOMEM; | |
dd7663e7 WAA |
850 | for (i = 0; i < size; i++) { |
851 | INIT_LIST_HEAD(&buckets[i].written); | |
852 | INIT_LIST_HEAD(&buckets[i].committing); | |
5002c586 WAA |
853 | /* mark direct verifier as unset */ |
854 | buckets[i].direct_verf.committed = NFS_INVALID_STABLE_HOW; | |
799ba8d5 | 855 | } |
dd7663e7 WAA |
856 | |
857 | spin_lock(cinfo->lock); | |
858 | if (cinfo->ds->nbuckets >= size) | |
859 | goto out; | |
860 | for (i = 0; i < cinfo->ds->nbuckets; i++) { | |
861 | list_splice(&cinfo->ds->buckets[i].written, | |
862 | &buckets[i].written); | |
863 | list_splice(&cinfo->ds->buckets[i].committing, | |
864 | &buckets[i].committing); | |
5002c586 WAA |
865 | buckets[i].direct_verf.committed = |
866 | cinfo->ds->buckets[i].direct_verf.committed; | |
dd7663e7 WAA |
867 | buckets[i].wlseg = cinfo->ds->buckets[i].wlseg; |
868 | buckets[i].clseg = cinfo->ds->buckets[i].clseg; | |
869 | } | |
870 | swap(cinfo->ds->buckets, buckets); | |
871 | cinfo->ds->nbuckets = size; | |
872 | out: | |
873 | spin_unlock(cinfo->lock); | |
874 | kfree(buckets); | |
875 | return 0; | |
799ba8d5 FI |
876 | } |
877 | ||
16b374ca AA |
878 | static struct pnfs_layout_segment * |
879 | filelayout_alloc_lseg(struct pnfs_layout_hdr *layoutid, | |
a75b9df9 TM |
880 | struct nfs4_layoutget_res *lgr, |
881 | gfp_t gfp_flags) | |
16b374ca AA |
882 | { |
883 | struct nfs4_filelayout_segment *fl; | |
884 | int rc; | |
885 | struct nfs4_deviceid id; | |
886 | ||
887 | dprintk("--> %s\n", __func__); | |
a75b9df9 | 888 | fl = kzalloc(sizeof(*fl), gfp_flags); |
16b374ca AA |
889 | if (!fl) |
890 | return NULL; | |
891 | ||
a75b9df9 TM |
892 | rc = filelayout_decode_layout(layoutid, fl, lgr, &id, gfp_flags); |
893 | if (rc != 0 || filelayout_check_layout(layoutid, fl, lgr, &id, gfp_flags)) { | |
16b374ca AA |
894 | _filelayout_free_lseg(fl); |
895 | return NULL; | |
896 | } | |
897 | return &fl->generic_hdr; | |
898 | } | |
899 | ||
94ad1c80 FI |
900 | /* |
901 | * filelayout_pg_test(). Called by nfs_can_coalesce_requests() | |
902 | * | |
b4fdac1a WAA |
903 | * Return 0 if @req cannot be coalesced into @pgio, otherwise return the number |
904 | * of bytes (maximum @req->wb_bytes) that can be coalesced. | |
94ad1c80 | 905 | */ |
b4fdac1a | 906 | static size_t |
94ad1c80 FI |
907 | filelayout_pg_test(struct nfs_pageio_descriptor *pgio, struct nfs_page *prev, |
908 | struct nfs_page *req) | |
909 | { | |
0f9c429e | 910 | unsigned int size; |
94ad1c80 | 911 | u64 p_stripe, r_stripe; |
c6194271 WAA |
912 | u32 stripe_offset; |
913 | u64 segment_offset = pgio->pg_lseg->pls_range.offset; | |
914 | u32 stripe_unit = FILELAYOUT_LSEG(pgio->pg_lseg)->stripe_unit; | |
94ad1c80 | 915 | |
0f9c429e WAA |
916 | /* calls nfs_generic_pg_test */ |
917 | size = pnfs_generic_pg_test(pgio, prev, req); | |
918 | if (!size) | |
b4fdac1a | 919 | return 0; |
89a58e32 | 920 | |
c6194271 | 921 | /* see if req and prev are in the same stripe */ |
0f9c429e | 922 | if (prev) { |
c6194271 WAA |
923 | p_stripe = (u64)req_offset(prev) - segment_offset; |
924 | r_stripe = (u64)req_offset(req) - segment_offset; | |
0f9c429e WAA |
925 | do_div(p_stripe, stripe_unit); |
926 | do_div(r_stripe, stripe_unit); | |
94ad1c80 | 927 | |
0f9c429e WAA |
928 | if (p_stripe != r_stripe) |
929 | return 0; | |
930 | } | |
c6194271 WAA |
931 | |
932 | /* calculate remaining bytes in the current stripe */ | |
933 | div_u64_rem((u64)req_offset(req) - segment_offset, | |
934 | stripe_unit, | |
935 | &stripe_offset); | |
936 | WARN_ON_ONCE(stripe_offset > stripe_unit); | |
937 | if (stripe_offset >= stripe_unit) | |
938 | return 0; | |
939 | return min(stripe_unit - (unsigned int)stripe_offset, size); | |
94ad1c80 FI |
940 | } |
941 | ||
17280175 | 942 | static void |
7c24d948 AA |
943 | filelayout_pg_init_read(struct nfs_pageio_descriptor *pgio, |
944 | struct nfs_page *req) | |
945 | { | |
c6194271 WAA |
946 | if (!pgio->pg_lseg) |
947 | pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode, | |
7c24d948 AA |
948 | req->wb_context, |
949 | 0, | |
950 | NFS4_MAX_UINT64, | |
951 | IOMODE_READ, | |
952 | GFP_KERNEL); | |
953 | /* If no lseg, fall back to read through mds */ | |
954 | if (pgio->pg_lseg == NULL) | |
1f945357 | 955 | nfs_pageio_reset_read_mds(pgio); |
7c24d948 AA |
956 | } |
957 | ||
17280175 | 958 | static void |
7c24d948 AA |
959 | filelayout_pg_init_write(struct nfs_pageio_descriptor *pgio, |
960 | struct nfs_page *req) | |
961 | { | |
ea2cf228 | 962 | struct nfs_commit_info cinfo; |
799ba8d5 FI |
963 | int status; |
964 | ||
c6194271 WAA |
965 | if (!pgio->pg_lseg) |
966 | pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode, | |
7c24d948 AA |
967 | req->wb_context, |
968 | 0, | |
969 | NFS4_MAX_UINT64, | |
970 | IOMODE_RW, | |
971 | GFP_NOFS); | |
972 | /* If no lseg, fall back to write through mds */ | |
973 | if (pgio->pg_lseg == NULL) | |
799ba8d5 | 974 | goto out_mds; |
ea2cf228 FI |
975 | nfs_init_cinfo(&cinfo, pgio->pg_inode, pgio->pg_dreq); |
976 | status = filelayout_alloc_commit_info(pgio->pg_lseg, &cinfo, GFP_NOFS); | |
799ba8d5 | 977 | if (status < 0) { |
9369a431 | 978 | pnfs_put_lseg(pgio->pg_lseg); |
799ba8d5 FI |
979 | pgio->pg_lseg = NULL; |
980 | goto out_mds; | |
981 | } | |
982 | return; | |
983 | out_mds: | |
984 | nfs_pageio_reset_write_mds(pgio); | |
7c24d948 AA |
985 | } |
986 | ||
1751c363 | 987 | static const struct nfs_pageio_ops filelayout_pg_read_ops = { |
7c24d948 | 988 | .pg_init = filelayout_pg_init_read, |
1751c363 | 989 | .pg_test = filelayout_pg_test, |
493292dd | 990 | .pg_doio = pnfs_generic_pg_readpages, |
1751c363 TM |
991 | }; |
992 | ||
993 | static const struct nfs_pageio_ops filelayout_pg_write_ops = { | |
7c24d948 | 994 | .pg_init = filelayout_pg_init_write, |
1751c363 | 995 | .pg_test = filelayout_pg_test, |
dce81290 | 996 | .pg_doio = pnfs_generic_pg_writepages, |
1751c363 TM |
997 | }; |
998 | ||
e0c2b380 FI |
999 | static u32 select_bucket_index(struct nfs4_filelayout_segment *fl, u32 j) |
1000 | { | |
1001 | if (fl->stripe_type == STRIPE_SPARSE) | |
1002 | return nfs4_fl_calc_ds_index(&fl->generic_hdr, j); | |
1003 | else | |
1004 | return j; | |
1005 | } | |
1006 | ||
d6d6dc7c FI |
1007 | /* The generic layer is about to remove the req from the commit list. |
1008 | * If this will make the bucket empty, it will need to put the lseg reference. | |
411a99ad | 1009 | * Note this is must be called holding the inode (/cinfo) lock |
d6d6dc7c | 1010 | */ |
8dd37758 | 1011 | static void |
ea2cf228 FI |
1012 | filelayout_clear_request_commit(struct nfs_page *req, |
1013 | struct nfs_commit_info *cinfo) | |
d6d6dc7c | 1014 | { |
8dd37758 | 1015 | struct pnfs_layout_segment *freeme = NULL; |
8dd37758 | 1016 | |
8dd37758 TM |
1017 | if (!test_and_clear_bit(PG_COMMIT_TO_DS, &req->wb_flags)) |
1018 | goto out; | |
ea2cf228 | 1019 | cinfo->ds->nwritten--; |
d6d6dc7c | 1020 | if (list_is_singular(&req->wb_list)) { |
ea2cf228 | 1021 | struct pnfs_commit_bucket *bucket; |
d6d6dc7c | 1022 | |
799ba8d5 | 1023 | bucket = list_first_entry(&req->wb_list, |
ea2cf228 | 1024 | struct pnfs_commit_bucket, |
799ba8d5 FI |
1025 | written); |
1026 | freeme = bucket->wlseg; | |
1027 | bucket->wlseg = NULL; | |
d6d6dc7c | 1028 | } |
8dd37758 | 1029 | out: |
ea2cf228 | 1030 | nfs_request_remove_commit_list(req, cinfo); |
6543f803 | 1031 | pnfs_put_lseg_locked(freeme); |
d6d6dc7c FI |
1032 | } |
1033 | ||
c8a3292d PT |
1034 | static void |
1035 | filelayout_mark_request_commit(struct nfs_page *req, | |
1036 | struct pnfs_layout_segment *lseg, | |
1037 | struct nfs_commit_info *cinfo) | |
1038 | ||
e0c2b380 | 1039 | { |
e0c2b380 FI |
1040 | struct nfs4_filelayout_segment *fl = FILELAYOUT_LSEG(lseg); |
1041 | u32 i, j; | |
1042 | struct list_head *list; | |
ea2cf228 | 1043 | struct pnfs_commit_bucket *buckets; |
e0c2b380 | 1044 | |
c8a3292d PT |
1045 | if (fl->commit_through_mds) { |
1046 | list = &cinfo->mds->list; | |
1047 | spin_lock(cinfo->lock); | |
1048 | goto mds_commit; | |
1049 | } | |
d6d6dc7c | 1050 | |
e0c2b380 FI |
1051 | /* Note that we are calling nfs4_fl_calc_j_index on each page |
1052 | * that ends up being committed to a data server. An attractive | |
1053 | * alternative is to add a field to nfs_write_data and nfs_page | |
1054 | * to store the value calculated in filelayout_write_pagelist | |
1055 | * and just use that here. | |
1056 | */ | |
b5542849 | 1057 | j = nfs4_fl_calc_j_index(lseg, req_offset(req)); |
e0c2b380 | 1058 | i = select_bucket_index(fl, j); |
d201c4de | 1059 | spin_lock(cinfo->lock); |
ea2cf228 | 1060 | buckets = cinfo->ds->buckets; |
799ba8d5 | 1061 | list = &buckets[i].written; |
e0c2b380 | 1062 | if (list_empty(list)) { |
d6d6dc7c FI |
1063 | /* Non-empty buckets hold a reference on the lseg. That ref |
1064 | * is normally transferred to the COMMIT call and released | |
1065 | * there. It could also be released if the last req is pulled | |
1066 | * off due to a rewrite, in which case it will be done in | |
799ba8d5 | 1067 | * filelayout_clear_request_commit |
d6d6dc7c | 1068 | */ |
9369a431 | 1069 | buckets[i].wlseg = pnfs_get_lseg(lseg); |
e0c2b380 | 1070 | } |
8dd37758 | 1071 | set_bit(PG_COMMIT_TO_DS, &req->wb_flags); |
ea2cf228 | 1072 | cinfo->ds->nwritten++; |
e0c2b380 | 1073 | |
c8a3292d PT |
1074 | mds_commit: |
1075 | /* nfs_request_add_commit_list(). We need to add req to list without | |
1076 | * dropping cinfo lock. | |
1077 | */ | |
1078 | set_bit(PG_CLEAN, &(req)->wb_flags); | |
1079 | nfs_list_add_request(req, list); | |
1080 | cinfo->mds->ncommit++; | |
1081 | spin_unlock(cinfo->lock); | |
1082 | if (!cinfo->dreq) { | |
1083 | inc_zone_page_state(req->wb_page, NR_UNSTABLE_NFS); | |
1084 | inc_bdi_stat(page_file_mapping(req->wb_page)->backing_dev_info, | |
1085 | BDI_RECLAIMABLE); | |
1086 | __mark_inode_dirty(req->wb_context->dentry->d_inode, | |
1087 | I_DIRTY_DATASYNC); | |
1088 | } | |
8dd37758 TM |
1089 | } |
1090 | ||
e0c2b380 FI |
1091 | static u32 calc_ds_index_from_commit(struct pnfs_layout_segment *lseg, u32 i) |
1092 | { | |
1093 | struct nfs4_filelayout_segment *flseg = FILELAYOUT_LSEG(lseg); | |
1094 | ||
1095 | if (flseg->stripe_type == STRIPE_SPARSE) | |
1096 | return i; | |
1097 | else | |
1098 | return nfs4_fl_calc_ds_index(lseg, i); | |
1099 | } | |
1100 | ||
1101 | static struct nfs_fh * | |
1102 | select_ds_fh_from_commit(struct pnfs_layout_segment *lseg, u32 i) | |
1103 | { | |
1104 | struct nfs4_filelayout_segment *flseg = FILELAYOUT_LSEG(lseg); | |
1105 | ||
1106 | if (flseg->stripe_type == STRIPE_SPARSE) { | |
1107 | if (flseg->num_fh == 1) | |
1108 | i = 0; | |
1109 | else if (flseg->num_fh == 0) | |
1110 | /* Use the MDS OPEN fh set in nfs_read_rpcsetup */ | |
1111 | return NULL; | |
1112 | } | |
1113 | return flseg->fh_array[i]; | |
1114 | } | |
1115 | ||
0b7c0153 | 1116 | static int filelayout_initiate_commit(struct nfs_commit_data *data, int how) |
e0c2b380 FI |
1117 | { |
1118 | struct pnfs_layout_segment *lseg = data->lseg; | |
1119 | struct nfs4_pnfs_ds *ds; | |
0e20162e | 1120 | struct rpc_clnt *ds_clnt; |
e0c2b380 FI |
1121 | u32 idx; |
1122 | struct nfs_fh *fh; | |
1123 | ||
1124 | idx = calc_ds_index_from_commit(lseg, data->ds_commit_index); | |
1125 | ds = nfs4_fl_prepare_ds(lseg, idx); | |
0e20162e AA |
1126 | if (!ds) |
1127 | goto out_err; | |
1128 | ||
1129 | ds_clnt = nfs4_find_or_create_ds_client(ds->ds_clp, data->inode); | |
1130 | if (IS_ERR(ds_clnt)) | |
1131 | goto out_err; | |
1132 | ||
3a7936c3 AA |
1133 | dprintk("%s ino %lu, how %d cl_count %d\n", __func__, |
1134 | data->inode->i_ino, how, atomic_read(&ds->ds_clp->cl_count)); | |
0b7c0153 | 1135 | data->commit_done_cb = filelayout_commit_done_cb; |
3a7936c3 | 1136 | atomic_inc(&ds->ds_clp->cl_count); |
e0c2b380 FI |
1137 | data->ds_clp = ds->ds_clp; |
1138 | fh = select_ds_fh_from_commit(lseg, data->ds_commit_index); | |
1139 | if (fh) | |
1140 | data->args.fh = fh; | |
0e20162e | 1141 | return nfs_initiate_commit(ds_clnt, data, |
9f0ec176 AA |
1142 | &filelayout_commit_call_ops, how, |
1143 | RPC_TASK_SOFTCONN); | |
0e20162e AA |
1144 | out_err: |
1145 | prepare_to_resend_writes(data); | |
1146 | filelayout_commit_release(data); | |
1147 | return -EAGAIN; | |
e0c2b380 FI |
1148 | } |
1149 | ||
8dd37758 | 1150 | static int |
1763da12 FI |
1151 | transfer_commit_list(struct list_head *src, struct list_head *dst, |
1152 | struct nfs_commit_info *cinfo, int max) | |
8dd37758 | 1153 | { |
8dd37758 TM |
1154 | struct nfs_page *req, *tmp; |
1155 | int ret = 0; | |
1156 | ||
1157 | list_for_each_entry_safe(req, tmp, src, wb_list) { | |
1158 | if (!nfs_lock_request(req)) | |
1159 | continue; | |
53b8ee34 | 1160 | kref_get(&req->wb_kref); |
ea2cf228 | 1161 | if (cond_resched_lock(cinfo->lock)) |
3b3be88d | 1162 | list_safe_reset_next(req, tmp, wb_list); |
ea2cf228 | 1163 | nfs_request_remove_commit_list(req, cinfo); |
8dd37758 TM |
1164 | clear_bit(PG_COMMIT_TO_DS, &req->wb_flags); |
1165 | nfs_list_add_request(req, dst); | |
1166 | ret++; | |
1763da12 | 1167 | if ((ret == max) && !cinfo->dreq) |
8dd37758 TM |
1168 | break; |
1169 | } | |
1763da12 FI |
1170 | return ret; |
1171 | } | |
1172 | ||
d201c4de | 1173 | /* Note called with cinfo->lock held. */ |
1763da12 FI |
1174 | static int |
1175 | filelayout_scan_ds_commit_list(struct pnfs_commit_bucket *bucket, | |
1176 | struct nfs_commit_info *cinfo, | |
1177 | int max) | |
1178 | { | |
1179 | struct list_head *src = &bucket->written; | |
1180 | struct list_head *dst = &bucket->committing; | |
1181 | int ret; | |
1182 | ||
1183 | ret = transfer_commit_list(src, dst, cinfo, max); | |
799ba8d5 | 1184 | if (ret) { |
ea2cf228 FI |
1185 | cinfo->ds->nwritten -= ret; |
1186 | cinfo->ds->ncommitting += ret; | |
799ba8d5 FI |
1187 | bucket->clseg = bucket->wlseg; |
1188 | if (list_empty(src)) | |
1189 | bucket->wlseg = NULL; | |
1190 | else | |
9369a431 | 1191 | pnfs_get_lseg(bucket->clseg); |
799ba8d5 | 1192 | } |
8dd37758 TM |
1193 | return ret; |
1194 | } | |
1195 | ||
d6d6dc7c | 1196 | /* Move reqs from written to committing lists, returning count of number moved. |
ea2cf228 | 1197 | * Note called with cinfo->lock held. |
d6d6dc7c | 1198 | */ |
ea2cf228 FI |
1199 | static int filelayout_scan_commit_lists(struct nfs_commit_info *cinfo, |
1200 | int max) | |
d6d6dc7c | 1201 | { |
d6d6dc7c FI |
1202 | int i, rv = 0, cnt; |
1203 | ||
ea2cf228 FI |
1204 | for (i = 0; i < cinfo->ds->nbuckets && max != 0; i++) { |
1205 | cnt = filelayout_scan_ds_commit_list(&cinfo->ds->buckets[i], | |
1206 | cinfo, max); | |
d6d6dc7c FI |
1207 | max -= cnt; |
1208 | rv += cnt; | |
1209 | } | |
d6d6dc7c FI |
1210 | return rv; |
1211 | } | |
1212 | ||
1763da12 FI |
1213 | /* Pull everything off the committing lists and dump into @dst */ |
1214 | static void filelayout_recover_commit_reqs(struct list_head *dst, | |
1215 | struct nfs_commit_info *cinfo) | |
1216 | { | |
1217 | struct pnfs_commit_bucket *b; | |
d201c4de | 1218 | struct pnfs_layout_segment *freeme; |
1763da12 FI |
1219 | int i; |
1220 | ||
d201c4de | 1221 | restart: |
471252cd | 1222 | spin_lock(cinfo->lock); |
1763da12 FI |
1223 | for (i = 0, b = cinfo->ds->buckets; i < cinfo->ds->nbuckets; i++, b++) { |
1224 | if (transfer_commit_list(&b->written, dst, cinfo, 0)) { | |
d201c4de | 1225 | freeme = b->wlseg; |
1763da12 | 1226 | b->wlseg = NULL; |
d201c4de WAA |
1227 | spin_unlock(cinfo->lock); |
1228 | pnfs_put_lseg(freeme); | |
1229 | goto restart; | |
1763da12 FI |
1230 | } |
1231 | } | |
1232 | cinfo->ds->nwritten = 0; | |
471252cd | 1233 | spin_unlock(cinfo->lock); |
1763da12 FI |
1234 | } |
1235 | ||
02d1426c WAA |
1236 | /* filelayout_search_commit_reqs - Search lists in @cinfo for the head reqest |
1237 | * for @page | |
1238 | * @cinfo - commit info for current inode | |
1239 | * @page - page to search for matching head request | |
1240 | * | |
1241 | * Returns a the head request if one is found, otherwise returns NULL. | |
1242 | */ | |
1243 | static struct nfs_page * | |
1244 | filelayout_search_commit_reqs(struct nfs_commit_info *cinfo, struct page *page) | |
1245 | { | |
1246 | struct nfs_page *freq, *t; | |
1247 | struct pnfs_commit_bucket *b; | |
1248 | int i; | |
1249 | ||
1250 | /* Linearly search the commit lists for each bucket until a matching | |
1251 | * request is found */ | |
1252 | for (i = 0, b = cinfo->ds->buckets; i < cinfo->ds->nbuckets; i++, b++) { | |
1253 | list_for_each_entry_safe(freq, t, &b->written, wb_list) { | |
1254 | if (freq->wb_page == page) | |
1255 | return freq->wb_head; | |
1256 | } | |
1257 | list_for_each_entry_safe(freq, t, &b->committing, wb_list) { | |
1258 | if (freq->wb_page == page) | |
1259 | return freq->wb_head; | |
1260 | } | |
1261 | } | |
1262 | ||
1263 | return NULL; | |
1264 | } | |
1265 | ||
0b0bc6ea PT |
1266 | static void filelayout_retry_commit(struct nfs_commit_info *cinfo, int idx) |
1267 | { | |
1268 | struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds; | |
224ecbf5 | 1269 | struct pnfs_commit_bucket *bucket; |
0b0bc6ea PT |
1270 | struct pnfs_layout_segment *freeme; |
1271 | int i; | |
1272 | ||
224ecbf5 WAA |
1273 | for (i = idx; i < fl_cinfo->nbuckets; i++) { |
1274 | bucket = &fl_cinfo->buckets[i]; | |
0b0bc6ea PT |
1275 | if (list_empty(&bucket->committing)) |
1276 | continue; | |
1277 | nfs_retry_commit(&bucket->committing, bucket->clseg, cinfo); | |
1278 | spin_lock(cinfo->lock); | |
1279 | freeme = bucket->clseg; | |
1280 | bucket->clseg = NULL; | |
1281 | spin_unlock(cinfo->lock); | |
1282 | pnfs_put_lseg(freeme); | |
1283 | } | |
1284 | } | |
1285 | ||
9390f425 | 1286 | static unsigned int |
ea2cf228 | 1287 | alloc_ds_commits(struct nfs_commit_info *cinfo, struct list_head *list) |
e0c2b380 | 1288 | { |
ea2cf228 FI |
1289 | struct pnfs_ds_commit_info *fl_cinfo; |
1290 | struct pnfs_commit_bucket *bucket; | |
0b7c0153 | 1291 | struct nfs_commit_data *data; |
0b0bc6ea | 1292 | int i; |
9390f425 | 1293 | unsigned int nreq = 0; |
e0c2b380 | 1294 | |
ea2cf228 | 1295 | fl_cinfo = cinfo->ds; |
799ba8d5 FI |
1296 | bucket = fl_cinfo->buckets; |
1297 | for (i = 0; i < fl_cinfo->nbuckets; i++, bucket++) { | |
1298 | if (list_empty(&bucket->committing)) | |
e0c2b380 FI |
1299 | continue; |
1300 | data = nfs_commitdata_alloc(); | |
1301 | if (!data) | |
9390f425 | 1302 | break; |
e0c2b380 | 1303 | data->ds_commit_index = i; |
d201c4de | 1304 | spin_lock(cinfo->lock); |
799ba8d5 FI |
1305 | data->lseg = bucket->clseg; |
1306 | bucket->clseg = NULL; | |
d201c4de | 1307 | spin_unlock(cinfo->lock); |
e0c2b380 | 1308 | list_add(&data->pages, list); |
9390f425 | 1309 | nreq++; |
e0c2b380 | 1310 | } |
e0c2b380 | 1311 | |
9390f425 | 1312 | /* Clean up on error */ |
0b0bc6ea | 1313 | filelayout_retry_commit(cinfo, i); |
e0c2b380 | 1314 | /* Caller will clean up entries put on list */ |
9390f425 | 1315 | return nreq; |
e0c2b380 FI |
1316 | } |
1317 | ||
1318 | /* This follows nfs_commit_list pretty closely */ | |
1319 | static int | |
1320 | filelayout_commit_pagelist(struct inode *inode, struct list_head *mds_pages, | |
ea2cf228 | 1321 | int how, struct nfs_commit_info *cinfo) |
e0c2b380 | 1322 | { |
0b7c0153 | 1323 | struct nfs_commit_data *data, *tmp; |
e0c2b380 | 1324 | LIST_HEAD(list); |
9390f425 | 1325 | unsigned int nreq = 0; |
e0c2b380 FI |
1326 | |
1327 | if (!list_empty(mds_pages)) { | |
1328 | data = nfs_commitdata_alloc(); | |
9390f425 TM |
1329 | if (data != NULL) { |
1330 | data->lseg = NULL; | |
1331 | list_add(&data->pages, &list); | |
1332 | nreq++; | |
0b0bc6ea | 1333 | } else { |
ea2cf228 | 1334 | nfs_retry_commit(mds_pages, NULL, cinfo); |
0b0bc6ea PT |
1335 | filelayout_retry_commit(cinfo, 0); |
1336 | cinfo->completion_ops->error_cleanup(NFS_I(inode)); | |
1337 | return -ENOMEM; | |
1338 | } | |
e0c2b380 FI |
1339 | } |
1340 | ||
ea2cf228 | 1341 | nreq += alloc_ds_commits(cinfo, &list); |
9390f425 TM |
1342 | |
1343 | if (nreq == 0) { | |
f453a54a | 1344 | cinfo->completion_ops->error_cleanup(NFS_I(inode)); |
9390f425 TM |
1345 | goto out; |
1346 | } | |
1347 | ||
ea2cf228 | 1348 | atomic_add(nreq, &cinfo->mds->rpcs_out); |
e0c2b380 FI |
1349 | |
1350 | list_for_each_entry_safe(data, tmp, &list, pages) { | |
1351 | list_del_init(&data->pages); | |
e0c2b380 | 1352 | if (!data->lseg) { |
f453a54a | 1353 | nfs_init_commit(data, mds_pages, NULL, cinfo); |
0b7c0153 | 1354 | nfs_initiate_commit(NFS_CLIENT(inode), data, |
9f0ec176 | 1355 | data->mds_ops, how, 0); |
e0c2b380 | 1356 | } else { |
ea2cf228 | 1357 | struct pnfs_commit_bucket *buckets; |
799ba8d5 | 1358 | |
ea2cf228 | 1359 | buckets = cinfo->ds->buckets; |
f453a54a | 1360 | nfs_init_commit(data, &buckets[data->ds_commit_index].committing, data->lseg, cinfo); |
e0c2b380 FI |
1361 | filelayout_initiate_commit(data, how); |
1362 | } | |
1363 | } | |
9390f425 | 1364 | out: |
ea2cf228 | 1365 | cinfo->ds->ncommitting = 0; |
9390f425 | 1366 | return PNFS_ATTEMPTED; |
e0c2b380 | 1367 | } |
661373b1 CH |
1368 | static struct nfs4_deviceid_node * |
1369 | filelayout_alloc_deviceid_node(struct nfs_server *server, | |
1370 | struct pnfs_device *pdev, gfp_t gfp_flags) | |
1371 | { | |
1372 | struct nfs4_file_layout_dsaddr *dsaddr; | |
1373 | ||
1374 | dsaddr = nfs4_fl_alloc_deviceid_node(server, pdev, gfp_flags); | |
1375 | if (!dsaddr) | |
1376 | return NULL; | |
1377 | return &dsaddr->id_node; | |
1378 | } | |
e0c2b380 | 1379 | |
1775bc34 BH |
1380 | static void |
1381 | filelayout_free_deveiceid_node(struct nfs4_deviceid_node *d) | |
1382 | { | |
1383 | nfs4_fl_free_deviceid(container_of(d, struct nfs4_file_layout_dsaddr, id_node)); | |
1384 | } | |
1385 | ||
799ba8d5 FI |
1386 | static struct pnfs_layout_hdr * |
1387 | filelayout_alloc_layout_hdr(struct inode *inode, gfp_t gfp_flags) | |
1388 | { | |
1389 | struct nfs4_filelayout *flo; | |
1390 | ||
1391 | flo = kzalloc(sizeof(*flo), gfp_flags); | |
6df200f5 | 1392 | return flo != NULL ? &flo->generic_hdr : NULL; |
799ba8d5 FI |
1393 | } |
1394 | ||
1395 | static void | |
1396 | filelayout_free_layout_hdr(struct pnfs_layout_hdr *lo) | |
1397 | { | |
1398 | kfree(FILELAYOUT_FROM_HDR(lo)); | |
1399 | } | |
1400 | ||
ea2cf228 FI |
1401 | static struct pnfs_ds_commit_info * |
1402 | filelayout_get_ds_info(struct inode *inode) | |
1403 | { | |
df011748 FI |
1404 | struct pnfs_layout_hdr *layout = NFS_I(inode)->layout; |
1405 | ||
1406 | if (layout == NULL) | |
1407 | return NULL; | |
1408 | else | |
1409 | return &FILELAYOUT_FROM_HDR(layout)->commit_info; | |
ea2cf228 FI |
1410 | } |
1411 | ||
7ab672ce | 1412 | static struct pnfs_layoutdriver_type filelayout_type = { |
ea8eecdd CH |
1413 | .id = LAYOUT_NFSV4_1_FILES, |
1414 | .name = "LAYOUT_NFSV4_1_FILES", | |
1415 | .owner = THIS_MODULE, | |
799ba8d5 FI |
1416 | .alloc_layout_hdr = filelayout_alloc_layout_hdr, |
1417 | .free_layout_hdr = filelayout_free_layout_hdr, | |
ea8eecdd CH |
1418 | .alloc_lseg = filelayout_alloc_lseg, |
1419 | .free_lseg = filelayout_free_lseg, | |
1751c363 TM |
1420 | .pg_read_ops = &filelayout_pg_read_ops, |
1421 | .pg_write_ops = &filelayout_pg_write_ops, | |
ea2cf228 | 1422 | .get_ds_info = &filelayout_get_ds_info, |
8dd37758 TM |
1423 | .mark_request_commit = filelayout_mark_request_commit, |
1424 | .clear_request_commit = filelayout_clear_request_commit, | |
d6d6dc7c | 1425 | .scan_commit_lists = filelayout_scan_commit_lists, |
1763da12 | 1426 | .recover_commit_reqs = filelayout_recover_commit_reqs, |
02d1426c | 1427 | .search_commit_reqs = filelayout_search_commit_reqs, |
e0c2b380 | 1428 | .commit_pagelist = filelayout_commit_pagelist, |
dc70d7b3 | 1429 | .read_pagelist = filelayout_read_pagelist, |
0382b744 | 1430 | .write_pagelist = filelayout_write_pagelist, |
661373b1 | 1431 | .alloc_deviceid_node = filelayout_alloc_deviceid_node, |
1775bc34 | 1432 | .free_deviceid_node = filelayout_free_deveiceid_node, |
7ab672ce DH |
1433 | }; |
1434 | ||
1435 | static int __init nfs4filelayout_init(void) | |
1436 | { | |
1437 | printk(KERN_INFO "%s: NFSv4 File Layout Driver Registering...\n", | |
1438 | __func__); | |
1439 | return pnfs_register_layoutdriver(&filelayout_type); | |
1440 | } | |
1441 | ||
1442 | static void __exit nfs4filelayout_exit(void) | |
1443 | { | |
1444 | printk(KERN_INFO "%s: NFSv4 File Layout Driver Unregistering...\n", | |
1445 | __func__); | |
1446 | pnfs_unregister_layoutdriver(&filelayout_type); | |
1447 | } | |
1448 | ||
f85ef69c BF |
1449 | MODULE_ALIAS("nfs-layouttype4-1"); |
1450 | ||
7ab672ce DH |
1451 | module_init(nfs4filelayout_init); |
1452 | module_exit(nfs4filelayout_exit); |