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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> |
66114cad | 35 | #include <linux/backing-dev.h> |
16b374ca | 36 | |
0a702195 WAA |
37 | #include <linux/sunrpc/metrics.h> |
38 | ||
b5968725 TH |
39 | #include "../nfs4session.h" |
40 | #include "../internal.h" | |
41 | #include "../delegation.h" | |
42 | #include "filelayout.h" | |
43 | #include "../nfs4trace.h" | |
7ab672ce DH |
44 | |
45 | #define NFSDBG_FACILITY NFSDBG_PNFS_LD | |
46 | ||
47 | MODULE_LICENSE("GPL"); | |
48 | MODULE_AUTHOR("Dean Hildebrand <dhildebz@umich.edu>"); | |
49 | MODULE_DESCRIPTION("The NFSv4 file layout driver"); | |
50 | ||
cbdabc7f AA |
51 | #define FILELAYOUT_POLL_RETRY_MAX (15*HZ) |
52 | ||
cfe7f412 FI |
53 | static loff_t |
54 | filelayout_get_dense_offset(struct nfs4_filelayout_segment *flseg, | |
55 | loff_t offset) | |
56 | { | |
57 | u32 stripe_width = flseg->stripe_unit * flseg->dsaddr->stripe_count; | |
3476f114 CM |
58 | u64 stripe_no; |
59 | u32 rem; | |
cfe7f412 FI |
60 | |
61 | offset -= flseg->pattern_offset; | |
3476f114 CM |
62 | stripe_no = div_u64(offset, stripe_width); |
63 | div_u64_rem(offset, flseg->stripe_unit, &rem); | |
cfe7f412 | 64 | |
3476f114 | 65 | return stripe_no * flseg->stripe_unit + rem; |
cfe7f412 FI |
66 | } |
67 | ||
68 | /* This function is used by the layout driver to calculate the | |
69 | * offset of the file on the dserver based on whether the | |
70 | * layout type is STRIPE_DENSE or STRIPE_SPARSE | |
71 | */ | |
72 | static loff_t | |
73 | filelayout_get_dserver_offset(struct pnfs_layout_segment *lseg, loff_t offset) | |
74 | { | |
75 | struct nfs4_filelayout_segment *flseg = FILELAYOUT_LSEG(lseg); | |
76 | ||
77 | switch (flseg->stripe_type) { | |
78 | case STRIPE_SPARSE: | |
79 | return offset; | |
80 | ||
81 | case STRIPE_DENSE: | |
82 | return filelayout_get_dense_offset(flseg, offset); | |
83 | } | |
84 | ||
85 | BUG(); | |
86 | } | |
87 | ||
d45f60c6 | 88 | static void filelayout_reset_write(struct nfs_pgio_header *hdr) |
e7dd79af | 89 | { |
d45f60c6 | 90 | struct rpc_task *task = &hdr->task; |
e7dd79af AA |
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__, |
d45f60c6 | 95 | hdr->task.tk_pid, |
497826af | 96 | hdr->inode->i_sb->s_id, |
1e8968c5 | 97 | (unsigned long long)NFS_FILEID(hdr->inode), |
d45f60c6 WAA |
98 | hdr->args.count, |
99 | (unsigned long long)hdr->args.offset); | |
e7dd79af | 100 | |
53113ad3 | 101 | task->tk_status = pnfs_write_done_resend_to_mds(hdr); |
e7dd79af AA |
102 | } |
103 | } | |
104 | ||
d45f60c6 | 105 | static void filelayout_reset_read(struct nfs_pgio_header *hdr) |
e7dd79af | 106 | { |
d45f60c6 | 107 | struct rpc_task *task = &hdr->task; |
e7dd79af AA |
108 | |
109 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) { | |
110 | dprintk("%s Reset task %5u for i/o through MDS " | |
1e8968c5 | 111 | "(req %s/%llu, %u bytes @ offset %llu)\n", __func__, |
d45f60c6 | 112 | hdr->task.tk_pid, |
497826af | 113 | hdr->inode->i_sb->s_id, |
1e8968c5 | 114 | (unsigned long long)NFS_FILEID(hdr->inode), |
d45f60c6 WAA |
115 | hdr->args.count, |
116 | (unsigned long long)hdr->args.offset); | |
e7dd79af | 117 | |
53113ad3 | 118 | task->tk_status = pnfs_read_done_resend_to_mds(hdr); |
e7dd79af AA |
119 | } |
120 | } | |
121 | ||
cbdabc7f AA |
122 | static int filelayout_async_handle_error(struct rpc_task *task, |
123 | struct nfs4_state *state, | |
124 | struct nfs_client *clp, | |
e7dd79af | 125 | struct pnfs_layout_segment *lseg) |
cbdabc7f | 126 | { |
d527e5c1 TM |
127 | struct pnfs_layout_hdr *lo = lseg->pls_layout; |
128 | struct inode *inode = lo->plh_inode; | |
e7dd79af AA |
129 | struct nfs_server *mds_server = NFS_SERVER(inode); |
130 | struct nfs4_deviceid_node *devid = FILELAYOUT_DEVID_NODE(lseg); | |
9cb81968 | 131 | struct nfs_client *mds_client = mds_server->nfs_client; |
671fb896 | 132 | struct nfs4_slot_table *tbl = &clp->cl_session->fc_slot_table; |
9cb81968 | 133 | |
cbdabc7f AA |
134 | if (task->tk_status >= 0) |
135 | return 0; | |
cbdabc7f AA |
136 | |
137 | switch (task->tk_status) { | |
9cb81968 AA |
138 | /* MDS state errors */ |
139 | case -NFS4ERR_DELEG_REVOKED: | |
140 | case -NFS4ERR_ADMIN_REVOKED: | |
141 | case -NFS4ERR_BAD_STATEID: | |
9cb81968 | 142 | case -NFS4ERR_OPENMODE: |
e7dd79af AA |
143 | if (state == NULL) |
144 | break; | |
5d422301 TM |
145 | if (nfs4_schedule_stateid_recovery(mds_server, state) < 0) |
146 | goto out_bad_stateid; | |
9cb81968 AA |
147 | goto wait_on_recovery; |
148 | case -NFS4ERR_EXPIRED: | |
5d422301 TM |
149 | if (state != NULL) { |
150 | if (nfs4_schedule_stateid_recovery(mds_server, state) < 0) | |
151 | goto out_bad_stateid; | |
152 | } | |
9cb81968 AA |
153 | nfs4_schedule_lease_recovery(mds_client); |
154 | goto wait_on_recovery; | |
155 | /* DS session errors */ | |
cbdabc7f AA |
156 | case -NFS4ERR_BADSESSION: |
157 | case -NFS4ERR_BADSLOT: | |
158 | case -NFS4ERR_BAD_HIGH_SLOT: | |
159 | case -NFS4ERR_DEADSESSION: | |
160 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
161 | case -NFS4ERR_SEQ_FALSE_RETRY: | |
162 | case -NFS4ERR_SEQ_MISORDERED: | |
163 | dprintk("%s ERROR %d, Reset session. Exchangeid " | |
164 | "flags 0x%x\n", __func__, task->tk_status, | |
165 | clp->cl_exchange_flags); | |
9f594791 | 166 | nfs4_schedule_session_recovery(clp->cl_session, task->tk_status); |
cbdabc7f AA |
167 | break; |
168 | case -NFS4ERR_DELAY: | |
169 | case -NFS4ERR_GRACE: | |
cbdabc7f AA |
170 | rpc_delay(task, FILELAYOUT_POLL_RETRY_MAX); |
171 | break; | |
a8a4ae3a AA |
172 | case -NFS4ERR_RETRY_UNCACHED_REP: |
173 | break; | |
041245c8 AA |
174 | /* Invalidate Layout errors */ |
175 | case -NFS4ERR_PNFS_NO_LAYOUT: | |
176 | case -ESTALE: /* mapped NFS4ERR_STALE */ | |
177 | case -EBADHANDLE: /* mapped NFS4ERR_BADHANDLE */ | |
178 | case -EISDIR: /* mapped NFS4ERR_ISDIR */ | |
179 | case -NFS4ERR_FHEXPIRED: | |
180 | case -NFS4ERR_WRONG_TYPE: | |
181 | dprintk("%s Invalid layout error %d\n", __func__, | |
182 | task->tk_status); | |
183 | /* | |
184 | * Destroy layout so new i/o will get a new layout. | |
185 | * Layout will not be destroyed until all current lseg | |
186 | * references are put. Mark layout as invalid to resend failed | |
187 | * i/o and all i/o waiting on the slot table to the MDS until | |
188 | * layout is destroyed and a new valid layout is obtained. | |
189 | */ | |
d42e7873 | 190 | pnfs_destroy_layout(NFS_I(inode)); |
041245c8 AA |
191 | rpc_wake_up(&tbl->slot_tbl_waitq); |
192 | goto reset; | |
e7dd79af AA |
193 | /* RPC connection errors */ |
194 | case -ECONNREFUSED: | |
195 | case -EHOSTDOWN: | |
196 | case -EHOSTUNREACH: | |
197 | case -ENETUNREACH: | |
198 | case -EIO: | |
199 | case -ETIMEDOUT: | |
200 | case -EPIPE: | |
201 | dprintk("%s DS connection error %d\n", __func__, | |
202 | task->tk_status); | |
1dfed273 | 203 | nfs4_mark_deviceid_unavailable(devid); |
c220106f | 204 | pnfs_error_mark_layout_for_return(inode, lseg); |
671fb896 | 205 | rpc_wake_up(&tbl->slot_tbl_waitq); |
e7dd79af | 206 | /* fall through */ |
cbdabc7f | 207 | default: |
041245c8 | 208 | reset: |
e7dd79af | 209 | dprintk("%s Retry through MDS. Error %d\n", __func__, |
cbdabc7f | 210 | task->tk_status); |
e7dd79af | 211 | return -NFS4ERR_RESET_TO_MDS; |
cbdabc7f | 212 | } |
9cb81968 | 213 | out: |
cbdabc7f AA |
214 | task->tk_status = 0; |
215 | return -EAGAIN; | |
5d422301 TM |
216 | out_bad_stateid: |
217 | task->tk_status = -EIO; | |
218 | return 0; | |
9cb81968 AA |
219 | wait_on_recovery: |
220 | rpc_sleep_on(&mds_client->cl_rpcwaitq, task, NULL); | |
221 | if (test_bit(NFS4CLNT_MANAGER_RUNNING, &mds_client->cl_state) == 0) | |
222 | rpc_wake_up_queued_task(&mds_client->cl_rpcwaitq, task); | |
223 | goto out; | |
cbdabc7f AA |
224 | } |
225 | ||
226 | /* NFS_PROTO call done callback routines */ | |
227 | ||
228 | static int filelayout_read_done_cb(struct rpc_task *task, | |
d45f60c6 | 229 | struct nfs_pgio_header *hdr) |
cbdabc7f | 230 | { |
e7dd79af | 231 | int err; |
cbdabc7f | 232 | |
d45f60c6 WAA |
233 | trace_nfs4_pnfs_read(hdr, task->tk_status); |
234 | err = filelayout_async_handle_error(task, hdr->args.context->state, | |
235 | hdr->ds_clp, hdr->lseg); | |
cbdabc7f | 236 | |
e7dd79af AA |
237 | switch (err) { |
238 | case -NFS4ERR_RESET_TO_MDS: | |
d45f60c6 | 239 | filelayout_reset_read(hdr); |
e7dd79af AA |
240 | return task->tk_status; |
241 | case -EAGAIN: | |
d00c5d43 | 242 | rpc_restart_call_prepare(task); |
cbdabc7f AA |
243 | return -EAGAIN; |
244 | } | |
245 | ||
246 | return 0; | |
247 | } | |
248 | ||
863a3c6c AA |
249 | /* |
250 | * We reference the rpc_cred of the first WRITE that triggers the need for | |
251 | * a LAYOUTCOMMIT, and use it to send the layoutcommit compound. | |
252 | * rfc5661 is not clear about which credential should be used. | |
253 | */ | |
254 | static void | |
d45f60c6 | 255 | filelayout_set_layoutcommit(struct nfs_pgio_header *hdr) |
863a3c6c | 256 | { |
cd841605 FI |
257 | |
258 | if (FILELAYOUT_LSEG(hdr->lseg)->commit_through_mds || | |
bc7d4b8f | 259 | hdr->res.verf->committed != NFS_DATA_SYNC) |
863a3c6c AA |
260 | return; |
261 | ||
67af7611 TM |
262 | pnfs_set_layoutcommit(hdr->inode, hdr->lseg, |
263 | hdr->mds_offset + hdr->res.count); | |
f383b7e8 | 264 | dprintk("%s inode %lu pls_end_pos %lu\n", __func__, hdr->inode->i_ino, |
cd841605 | 265 | (unsigned long) NFS_I(hdr->inode)->layout->plh_lwb); |
863a3c6c AA |
266 | } |
267 | ||
1dfed273 TM |
268 | bool |
269 | filelayout_test_devid_unavailable(struct nfs4_deviceid_node *node) | |
270 | { | |
271 | return filelayout_test_devid_invalid(node) || | |
272 | nfs4_test_deviceid_unavailable(node); | |
273 | } | |
274 | ||
275 | static bool | |
276 | filelayout_reset_to_mds(struct pnfs_layout_segment *lseg) | |
277 | { | |
278 | struct nfs4_deviceid_node *node = FILELAYOUT_DEVID_NODE(lseg); | |
279 | ||
8006bfba | 280 | return filelayout_test_devid_unavailable(node); |
1dfed273 TM |
281 | } |
282 | ||
dc70d7b3 AA |
283 | /* |
284 | * Call ops for the async read/write cases | |
285 | * In the case of dense layouts, the offset needs to be reset to its | |
286 | * original value. | |
287 | */ | |
288 | static void filelayout_read_prepare(struct rpc_task *task, void *data) | |
289 | { | |
d45f60c6 | 290 | struct nfs_pgio_header *hdr = data; |
dc70d7b3 | 291 | |
d45f60c6 | 292 | if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags))) { |
c58c8441 TM |
293 | rpc_exit(task, -EIO); |
294 | return; | |
295 | } | |
d45f60c6 | 296 | if (filelayout_reset_to_mds(hdr->lseg)) { |
0ad2f378 | 297 | dprintk("%s task %u reset io to MDS\n", __func__, task->tk_pid); |
d45f60c6 | 298 | filelayout_reset_read(hdr); |
0ad2f378 AA |
299 | rpc_exit(task, 0); |
300 | return; | |
301 | } | |
d45f60c6 | 302 | hdr->pgio_done_cb = filelayout_read_done_cb; |
cbdabc7f | 303 | |
d45f60c6 WAA |
304 | if (nfs41_setup_sequence(hdr->ds_clp->cl_session, |
305 | &hdr->args.seq_args, | |
306 | &hdr->res.seq_res, | |
9b206149 TM |
307 | task)) |
308 | return; | |
d45f60c6 WAA |
309 | if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context, |
310 | hdr->args.lock_context, FMODE_READ) == -EIO) | |
869a9d37 | 311 | rpc_exit(task, -EIO); /* lost lock, terminate I/O */ |
dc70d7b3 AA |
312 | } |
313 | ||
314 | static void filelayout_read_call_done(struct rpc_task *task, void *data) | |
315 | { | |
d45f60c6 | 316 | struct nfs_pgio_header *hdr = data; |
dc70d7b3 AA |
317 | |
318 | dprintk("--> %s task->tk_status %d\n", __func__, task->tk_status); | |
319 | ||
d45f60c6 | 320 | if (test_bit(NFS_IOHDR_REDO, &hdr->flags) && |
f9c96fcc | 321 | task->tk_status == 0) { |
d45f60c6 | 322 | nfs41_sequence_done(task, &hdr->res.seq_res); |
0ad2f378 | 323 | return; |
f9c96fcc | 324 | } |
0ad2f378 | 325 | |
dc70d7b3 | 326 | /* Note this may cause RPC to be resent */ |
d45f60c6 | 327 | hdr->mds_ops->rpc_call_done(task, data); |
dc70d7b3 AA |
328 | } |
329 | ||
0a702195 WAA |
330 | static void filelayout_read_count_stats(struct rpc_task *task, void *data) |
331 | { | |
d45f60c6 | 332 | struct nfs_pgio_header *hdr = data; |
0a702195 | 333 | |
d45f60c6 | 334 | rpc_count_iostats(task, NFS_SERVER(hdr->inode)->client->cl_metrics); |
0a702195 WAA |
335 | } |
336 | ||
a69aef14 | 337 | static int filelayout_write_done_cb(struct rpc_task *task, |
d45f60c6 | 338 | struct nfs_pgio_header *hdr) |
a69aef14 | 339 | { |
e7dd79af AA |
340 | int err; |
341 | ||
d45f60c6 WAA |
342 | trace_nfs4_pnfs_write(hdr, task->tk_status); |
343 | err = filelayout_async_handle_error(task, hdr->args.context->state, | |
344 | hdr->ds_clp, hdr->lseg); | |
e7dd79af AA |
345 | |
346 | switch (err) { | |
347 | case -NFS4ERR_RESET_TO_MDS: | |
d45f60c6 | 348 | filelayout_reset_write(hdr); |
e7dd79af AA |
349 | return task->tk_status; |
350 | case -EAGAIN: | |
d00c5d43 | 351 | rpc_restart_call_prepare(task); |
a69aef14 FI |
352 | return -EAGAIN; |
353 | } | |
354 | ||
d45f60c6 | 355 | filelayout_set_layoutcommit(hdr); |
a69aef14 FI |
356 | return 0; |
357 | } | |
358 | ||
e0c2b380 | 359 | static int filelayout_commit_done_cb(struct rpc_task *task, |
0b7c0153 | 360 | struct nfs_commit_data *data) |
e0c2b380 | 361 | { |
e7dd79af AA |
362 | int err; |
363 | ||
cc668ab3 | 364 | trace_nfs4_pnfs_commit_ds(data, task->tk_status); |
e7dd79af AA |
365 | err = filelayout_async_handle_error(task, NULL, data->ds_clp, |
366 | data->lseg); | |
367 | ||
368 | switch (err) { | |
369 | case -NFS4ERR_RESET_TO_MDS: | |
f54bcf2e | 370 | pnfs_generic_prepare_to_resend_writes(data); |
e7dd79af AA |
371 | return -EAGAIN; |
372 | case -EAGAIN: | |
373 | rpc_restart_call_prepare(task); | |
e0c2b380 FI |
374 | return -EAGAIN; |
375 | } | |
376 | ||
bc7d4b8f | 377 | if (data->verf.committed == NFS_UNSTABLE) |
67af7611 | 378 | pnfs_set_layoutcommit(data->inode, data->lseg, data->lwb); |
bc7d4b8f | 379 | |
e0c2b380 FI |
380 | return 0; |
381 | } | |
382 | ||
a69aef14 FI |
383 | static void filelayout_write_prepare(struct rpc_task *task, void *data) |
384 | { | |
d45f60c6 | 385 | struct nfs_pgio_header *hdr = data; |
a69aef14 | 386 | |
d45f60c6 | 387 | if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags))) { |
c58c8441 TM |
388 | rpc_exit(task, -EIO); |
389 | return; | |
390 | } | |
d45f60c6 | 391 | if (filelayout_reset_to_mds(hdr->lseg)) { |
0ad2f378 | 392 | dprintk("%s task %u reset io to MDS\n", __func__, task->tk_pid); |
d45f60c6 | 393 | filelayout_reset_write(hdr); |
0ad2f378 AA |
394 | rpc_exit(task, 0); |
395 | return; | |
396 | } | |
d45f60c6 WAA |
397 | if (nfs41_setup_sequence(hdr->ds_clp->cl_session, |
398 | &hdr->args.seq_args, | |
399 | &hdr->res.seq_res, | |
9b206149 TM |
400 | task)) |
401 | return; | |
d45f60c6 WAA |
402 | if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context, |
403 | hdr->args.lock_context, FMODE_WRITE) == -EIO) | |
869a9d37 | 404 | rpc_exit(task, -EIO); /* lost lock, terminate I/O */ |
a69aef14 FI |
405 | } |
406 | ||
407 | static void filelayout_write_call_done(struct rpc_task *task, void *data) | |
408 | { | |
d45f60c6 | 409 | struct nfs_pgio_header *hdr = data; |
a69aef14 | 410 | |
d45f60c6 | 411 | if (test_bit(NFS_IOHDR_REDO, &hdr->flags) && |
f9c96fcc | 412 | task->tk_status == 0) { |
d45f60c6 | 413 | nfs41_sequence_done(task, &hdr->res.seq_res); |
0ad2f378 | 414 | return; |
f9c96fcc | 415 | } |
0ad2f378 | 416 | |
a69aef14 | 417 | /* Note this may cause RPC to be resent */ |
d45f60c6 | 418 | hdr->mds_ops->rpc_call_done(task, data); |
a69aef14 FI |
419 | } |
420 | ||
0a702195 WAA |
421 | static void filelayout_write_count_stats(struct rpc_task *task, void *data) |
422 | { | |
d45f60c6 | 423 | struct nfs_pgio_header *hdr = data; |
0a702195 | 424 | |
d45f60c6 | 425 | rpc_count_iostats(task, NFS_SERVER(hdr->inode)->client->cl_metrics); |
0a702195 WAA |
426 | } |
427 | ||
0b7c0153 | 428 | static void filelayout_commit_prepare(struct rpc_task *task, void *data) |
e0c2b380 | 429 | { |
0b7c0153 | 430 | struct nfs_commit_data *wdata = data; |
e0c2b380 | 431 | |
d9afbd1b TM |
432 | nfs41_setup_sequence(wdata->ds_clp->cl_session, |
433 | &wdata->args.seq_args, | |
434 | &wdata->res.seq_res, | |
435 | task); | |
0b7c0153 FI |
436 | } |
437 | ||
0b7c0153 FI |
438 | static void filelayout_commit_count_stats(struct rpc_task *task, void *data) |
439 | { | |
440 | struct nfs_commit_data *cdata = data; | |
441 | ||
442 | rpc_count_iostats(task, NFS_SERVER(cdata->inode)->client->cl_metrics); | |
443 | } | |
444 | ||
17280175 | 445 | static const struct rpc_call_ops filelayout_read_call_ops = { |
dc70d7b3 AA |
446 | .rpc_call_prepare = filelayout_read_prepare, |
447 | .rpc_call_done = filelayout_read_call_done, | |
0a702195 | 448 | .rpc_count_stats = filelayout_read_count_stats, |
f54bcf2e | 449 | .rpc_release = pnfs_generic_rw_release, |
dc70d7b3 AA |
450 | }; |
451 | ||
17280175 | 452 | static const struct rpc_call_ops filelayout_write_call_ops = { |
a69aef14 FI |
453 | .rpc_call_prepare = filelayout_write_prepare, |
454 | .rpc_call_done = filelayout_write_call_done, | |
0a702195 | 455 | .rpc_count_stats = filelayout_write_count_stats, |
f54bcf2e | 456 | .rpc_release = pnfs_generic_rw_release, |
a69aef14 FI |
457 | }; |
458 | ||
17280175 | 459 | static const struct rpc_call_ops filelayout_commit_call_ops = { |
0b7c0153 | 460 | .rpc_call_prepare = filelayout_commit_prepare, |
f54bcf2e | 461 | .rpc_call_done = pnfs_generic_write_commit_done, |
0b7c0153 | 462 | .rpc_count_stats = filelayout_commit_count_stats, |
f54bcf2e | 463 | .rpc_release = pnfs_generic_commit_release, |
e0c2b380 FI |
464 | }; |
465 | ||
dc70d7b3 | 466 | static enum pnfs_try_status |
d45f60c6 | 467 | filelayout_read_pagelist(struct nfs_pgio_header *hdr) |
dc70d7b3 | 468 | { |
cd841605 | 469 | struct pnfs_layout_segment *lseg = hdr->lseg; |
dc70d7b3 | 470 | struct nfs4_pnfs_ds *ds; |
0e20162e | 471 | struct rpc_clnt *ds_clnt; |
d45f60c6 | 472 | loff_t offset = hdr->args.offset; |
dc70d7b3 AA |
473 | u32 j, idx; |
474 | struct nfs_fh *fh; | |
dc70d7b3 AA |
475 | |
476 | dprintk("--> %s ino %lu pgbase %u req %Zu@%llu\n", | |
cd841605 | 477 | __func__, hdr->inode->i_ino, |
d45f60c6 | 478 | hdr->args.pgbase, (size_t)hdr->args.count, offset); |
dc70d7b3 AA |
479 | |
480 | /* Retrieve the correct rpc_client for the byte range */ | |
481 | j = nfs4_fl_calc_j_index(lseg, offset); | |
482 | idx = nfs4_fl_calc_ds_index(lseg, j); | |
483 | ds = nfs4_fl_prepare_ds(lseg, idx); | |
90fecfcb | 484 | if (!ds) |
dc70d7b3 | 485 | return PNFS_NOT_ATTEMPTED; |
0e20162e AA |
486 | |
487 | ds_clnt = nfs4_find_or_create_ds_client(ds->ds_clp, hdr->inode); | |
488 | if (IS_ERR(ds_clnt)) | |
489 | return PNFS_NOT_ATTEMPTED; | |
490 | ||
3a7936c3 AA |
491 | dprintk("%s USE DS: %s cl_count %d\n", __func__, |
492 | ds->ds_remotestr, atomic_read(&ds->ds_clp->cl_count)); | |
dc70d7b3 AA |
493 | |
494 | /* No multipath support. Use first DS */ | |
3a7936c3 | 495 | atomic_inc(&ds->ds_clp->cl_count); |
d45f60c6 | 496 | hdr->ds_clp = ds->ds_clp; |
6cccbb6f | 497 | hdr->ds_commit_idx = idx; |
dc70d7b3 AA |
498 | fh = nfs4_fl_select_ds_fh(lseg, j); |
499 | if (fh) | |
d45f60c6 | 500 | hdr->args.fh = fh; |
dc70d7b3 | 501 | |
d45f60c6 WAA |
502 | hdr->args.offset = filelayout_get_dserver_offset(lseg, offset); |
503 | hdr->mds_offset = offset; | |
dc70d7b3 AA |
504 | |
505 | /* Perform an asynchronous read to ds */ | |
46a5ab47 PT |
506 | nfs_initiate_pgio(ds_clnt, hdr, hdr->cred, |
507 | NFS_PROTO(hdr->inode), &filelayout_read_call_ops, | |
508 | 0, RPC_TASK_SOFTCONN); | |
dc70d7b3 AA |
509 | return PNFS_ATTEMPTED; |
510 | } | |
511 | ||
a69aef14 | 512 | /* Perform async writes. */ |
0382b744 | 513 | static enum pnfs_try_status |
d45f60c6 | 514 | filelayout_write_pagelist(struct nfs_pgio_header *hdr, int sync) |
0382b744 | 515 | { |
cd841605 | 516 | struct pnfs_layout_segment *lseg = hdr->lseg; |
a69aef14 | 517 | struct nfs4_pnfs_ds *ds; |
0e20162e | 518 | struct rpc_clnt *ds_clnt; |
d45f60c6 | 519 | loff_t offset = hdr->args.offset; |
a69aef14 FI |
520 | u32 j, idx; |
521 | struct nfs_fh *fh; | |
a69aef14 FI |
522 | |
523 | /* Retrieve the correct rpc_client for the byte range */ | |
524 | j = nfs4_fl_calc_j_index(lseg, offset); | |
525 | idx = nfs4_fl_calc_ds_index(lseg, j); | |
526 | ds = nfs4_fl_prepare_ds(lseg, idx); | |
90fecfcb | 527 | if (!ds) |
a69aef14 | 528 | return PNFS_NOT_ATTEMPTED; |
0e20162e AA |
529 | |
530 | ds_clnt = nfs4_find_or_create_ds_client(ds->ds_clp, hdr->inode); | |
531 | if (IS_ERR(ds_clnt)) | |
532 | return PNFS_NOT_ATTEMPTED; | |
533 | ||
3a7936c3 | 534 | dprintk("%s ino %lu sync %d req %Zu@%llu DS: %s cl_count %d\n", |
d45f60c6 | 535 | __func__, hdr->inode->i_ino, sync, (size_t) hdr->args.count, |
3a7936c3 | 536 | offset, ds->ds_remotestr, atomic_read(&ds->ds_clp->cl_count)); |
a69aef14 | 537 | |
d45f60c6 | 538 | hdr->pgio_done_cb = filelayout_write_done_cb; |
3a7936c3 | 539 | atomic_inc(&ds->ds_clp->cl_count); |
d45f60c6 | 540 | hdr->ds_clp = ds->ds_clp; |
6cccbb6f | 541 | hdr->ds_commit_idx = idx; |
a69aef14 FI |
542 | fh = nfs4_fl_select_ds_fh(lseg, j); |
543 | if (fh) | |
d45f60c6 WAA |
544 | hdr->args.fh = fh; |
545 | hdr->args.offset = filelayout_get_dserver_offset(lseg, offset); | |
a69aef14 FI |
546 | |
547 | /* Perform an asynchronous write */ | |
46a5ab47 PT |
548 | nfs_initiate_pgio(ds_clnt, hdr, hdr->cred, |
549 | NFS_PROTO(hdr->inode), &filelayout_write_call_ops, | |
550 | sync, RPC_TASK_SOFTCONN); | |
a69aef14 | 551 | return PNFS_ATTEMPTED; |
0382b744 AA |
552 | } |
553 | ||
16b374ca AA |
554 | /* |
555 | * filelayout_check_layout() | |
556 | * | |
557 | * Make sure layout segment parameters are sane WRT the device. | |
558 | * At this point no generic layer initialization of the lseg has occurred, | |
559 | * and nothing has been added to the layout_hdr cache. | |
560 | * | |
561 | */ | |
562 | static int | |
563 | filelayout_check_layout(struct pnfs_layout_hdr *lo, | |
564 | struct nfs4_filelayout_segment *fl, | |
565 | struct nfs4_layoutget_res *lgr, | |
a75b9df9 TM |
566 | struct nfs4_deviceid *id, |
567 | gfp_t gfp_flags) | |
16b374ca | 568 | { |
a1eaecbc | 569 | struct nfs4_deviceid_node *d; |
16b374ca AA |
570 | struct nfs4_file_layout_dsaddr *dsaddr; |
571 | int status = -EINVAL; | |
16b374ca AA |
572 | |
573 | dprintk("--> %s\n", __func__); | |
574 | ||
7c24d948 AA |
575 | /* FIXME: remove this check when layout segment support is added */ |
576 | if (lgr->range.offset != 0 || | |
577 | lgr->range.length != NFS4_MAX_UINT64) { | |
578 | dprintk("%s Only whole file layouts supported. Use MDS i/o\n", | |
579 | __func__); | |
580 | goto out; | |
581 | } | |
582 | ||
16b374ca | 583 | if (fl->pattern_offset > lgr->range.offset) { |
3b6445a6 | 584 | dprintk("%s pattern_offset %lld too large\n", |
16b374ca AA |
585 | __func__, fl->pattern_offset); |
586 | goto out; | |
587 | } | |
588 | ||
c6194271 | 589 | if (!fl->stripe_unit) { |
75247aff | 590 | dprintk("%s Invalid stripe unit (%u)\n", |
16b374ca AA |
591 | __func__, fl->stripe_unit); |
592 | goto out; | |
593 | } | |
594 | ||
595 | /* find and reference the deviceid */ | |
661373b1 CH |
596 | d = nfs4_find_get_deviceid(NFS_SERVER(lo->plh_inode), id, |
597 | lo->plh_lc_cred, gfp_flags); | |
598 | if (d == NULL) | |
599 | goto out; | |
600 | ||
601 | dsaddr = container_of(d, struct nfs4_file_layout_dsaddr, id_node); | |
1dfed273 TM |
602 | /* Found deviceid is unavailable */ |
603 | if (filelayout_test_devid_unavailable(&dsaddr->id_node)) | |
661373b1 | 604 | goto out_put; |
c47abcf8 | 605 | |
16b374ca AA |
606 | fl->dsaddr = dsaddr; |
607 | ||
e414966b CL |
608 | if (fl->first_stripe_index >= dsaddr->stripe_count) { |
609 | dprintk("%s Bad first_stripe_index %u\n", | |
16b374ca AA |
610 | __func__, fl->first_stripe_index); |
611 | goto out_put; | |
612 | } | |
613 | ||
614 | if ((fl->stripe_type == STRIPE_SPARSE && | |
615 | fl->num_fh > 1 && fl->num_fh != dsaddr->ds_num) || | |
616 | (fl->stripe_type == STRIPE_DENSE && | |
617 | fl->num_fh != dsaddr->stripe_count)) { | |
618 | dprintk("%s num_fh %u not valid for given packing\n", | |
619 | __func__, fl->num_fh); | |
620 | goto out_put; | |
621 | } | |
622 | ||
16b374ca AA |
623 | status = 0; |
624 | out: | |
625 | dprintk("--> %s returns %d\n", __func__, status); | |
626 | return status; | |
627 | out_put: | |
ea8eecdd | 628 | nfs4_fl_put_deviceid(dsaddr); |
16b374ca AA |
629 | goto out; |
630 | } | |
631 | ||
3ec0c979 | 632 | static void _filelayout_free_lseg(struct nfs4_filelayout_segment *fl) |
16b374ca AA |
633 | { |
634 | int i; | |
635 | ||
3ec0c979 KM |
636 | if (fl->fh_array) { |
637 | for (i = 0; i < fl->num_fh; i++) { | |
638 | if (!fl->fh_array[i]) | |
639 | break; | |
640 | kfree(fl->fh_array[i]); | |
641 | } | |
642 | kfree(fl->fh_array); | |
16b374ca | 643 | } |
16b374ca AA |
644 | kfree(fl); |
645 | } | |
646 | ||
647 | static int | |
648 | filelayout_decode_layout(struct pnfs_layout_hdr *flo, | |
649 | struct nfs4_filelayout_segment *fl, | |
650 | struct nfs4_layoutget_res *lgr, | |
a75b9df9 TM |
651 | struct nfs4_deviceid *id, |
652 | gfp_t gfp_flags) | |
16b374ca | 653 | { |
35124a09 | 654 | struct xdr_stream stream; |
f7da7a12 | 655 | struct xdr_buf buf; |
35124a09 WAA |
656 | struct page *scratch; |
657 | __be32 *p; | |
16b374ca AA |
658 | uint32_t nfl_util; |
659 | int i; | |
660 | ||
661 | dprintk("%s: set_layout_map Begin\n", __func__); | |
662 | ||
a75b9df9 | 663 | scratch = alloc_page(gfp_flags); |
35124a09 WAA |
664 | if (!scratch) |
665 | return -ENOMEM; | |
666 | ||
f7da7a12 | 667 | xdr_init_decode_pages(&stream, &buf, lgr->layoutp->pages, lgr->layoutp->len); |
35124a09 WAA |
668 | xdr_set_scratch_buffer(&stream, page_address(scratch), PAGE_SIZE); |
669 | ||
670 | /* 20 = ufl_util (4), first_stripe_index (4), pattern_offset (8), | |
671 | * num_fh (4) */ | |
672 | p = xdr_inline_decode(&stream, NFS4_DEVICEID4_SIZE + 20); | |
673 | if (unlikely(!p)) | |
674 | goto out_err; | |
675 | ||
16b374ca AA |
676 | memcpy(id, p, sizeof(*id)); |
677 | p += XDR_QUADLEN(NFS4_DEVICEID4_SIZE); | |
a1eaecbc | 678 | nfs4_print_deviceid(id); |
16b374ca AA |
679 | |
680 | nfl_util = be32_to_cpup(p++); | |
681 | if (nfl_util & NFL4_UFLG_COMMIT_THRU_MDS) | |
682 | fl->commit_through_mds = 1; | |
683 | if (nfl_util & NFL4_UFLG_DENSE) | |
684 | fl->stripe_type = STRIPE_DENSE; | |
685 | else | |
686 | fl->stripe_type = STRIPE_SPARSE; | |
687 | fl->stripe_unit = nfl_util & ~NFL4_UFLG_MASK; | |
688 | ||
689 | fl->first_stripe_index = be32_to_cpup(p++); | |
690 | p = xdr_decode_hyper(p, &fl->pattern_offset); | |
691 | fl->num_fh = be32_to_cpup(p++); | |
692 | ||
693 | dprintk("%s: nfl_util 0x%X num_fh %u fsi %u po %llu\n", | |
694 | __func__, nfl_util, fl->num_fh, fl->first_stripe_index, | |
695 | fl->pattern_offset); | |
696 | ||
cec765cf AA |
697 | /* Note that a zero value for num_fh is legal for STRIPE_SPARSE. |
698 | * Futher checking is done in filelayout_check_layout */ | |
e414966b | 699 | if (fl->num_fh > |
cec765cf | 700 | max(NFS4_PNFS_MAX_STRIPE_CNT, NFS4_PNFS_MAX_MULTI_CNT)) |
35124a09 WAA |
701 | goto out_err; |
702 | ||
cec765cf | 703 | if (fl->num_fh > 0) { |
1813badd | 704 | fl->fh_array = kcalloc(fl->num_fh, sizeof(fl->fh_array[0]), |
cec765cf AA |
705 | gfp_flags); |
706 | if (!fl->fh_array) | |
707 | goto out_err; | |
708 | } | |
16b374ca AA |
709 | |
710 | for (i = 0; i < fl->num_fh; i++) { | |
711 | /* Do we want to use a mempool here? */ | |
a75b9df9 | 712 | fl->fh_array[i] = kmalloc(sizeof(struct nfs_fh), gfp_flags); |
35124a09 | 713 | if (!fl->fh_array[i]) |
3ec0c979 | 714 | goto out_err; |
35124a09 WAA |
715 | |
716 | p = xdr_inline_decode(&stream, 4); | |
717 | if (unlikely(!p)) | |
3ec0c979 | 718 | goto out_err; |
16b374ca AA |
719 | fl->fh_array[i]->size = be32_to_cpup(p++); |
720 | if (sizeof(struct nfs_fh) < fl->fh_array[i]->size) { | |
f9fd2d9c | 721 | printk(KERN_ERR "NFS: Too big fh %d received %d\n", |
16b374ca | 722 | i, fl->fh_array[i]->size); |
3ec0c979 | 723 | goto out_err; |
16b374ca | 724 | } |
35124a09 WAA |
725 | |
726 | p = xdr_inline_decode(&stream, fl->fh_array[i]->size); | |
727 | if (unlikely(!p)) | |
3ec0c979 | 728 | goto out_err; |
16b374ca | 729 | memcpy(fl->fh_array[i]->data, p, fl->fh_array[i]->size); |
16b374ca AA |
730 | dprintk("DEBUG: %s: fh len %d\n", __func__, |
731 | fl->fh_array[i]->size); | |
732 | } | |
733 | ||
35124a09 | 734 | __free_page(scratch); |
16b374ca | 735 | return 0; |
35124a09 | 736 | |
35124a09 WAA |
737 | out_err: |
738 | __free_page(scratch); | |
739 | return -EIO; | |
16b374ca AA |
740 | } |
741 | ||
c879513e FI |
742 | static void |
743 | filelayout_free_lseg(struct pnfs_layout_segment *lseg) | |
744 | { | |
745 | struct nfs4_filelayout_segment *fl = FILELAYOUT_LSEG(lseg); | |
746 | ||
747 | dprintk("--> %s\n", __func__); | |
748 | nfs4_fl_put_deviceid(fl->dsaddr); | |
799ba8d5 FI |
749 | /* This assumes a single RW lseg */ |
750 | if (lseg->pls_range.iomode == IOMODE_RW) { | |
751 | struct nfs4_filelayout *flo; | |
752 | ||
753 | flo = FILELAYOUT_FROM_HDR(lseg->pls_layout); | |
754 | flo->commit_info.nbuckets = 0; | |
755 | kfree(flo->commit_info.buckets); | |
756 | flo->commit_info.buckets = NULL; | |
757 | } | |
c879513e FI |
758 | _filelayout_free_lseg(fl); |
759 | } | |
760 | ||
799ba8d5 FI |
761 | static int |
762 | filelayout_alloc_commit_info(struct pnfs_layout_segment *lseg, | |
ea2cf228 | 763 | struct nfs_commit_info *cinfo, |
799ba8d5 FI |
764 | gfp_t gfp_flags) |
765 | { | |
766 | struct nfs4_filelayout_segment *fl = FILELAYOUT_LSEG(lseg); | |
ea2cf228 | 767 | struct pnfs_commit_bucket *buckets; |
dd7663e7 | 768 | int size, i; |
799ba8d5 FI |
769 | |
770 | if (fl->commit_through_mds) | |
771 | return 0; | |
dd7663e7 WAA |
772 | |
773 | size = (fl->stripe_type == STRIPE_SPARSE) ? | |
774 | fl->dsaddr->ds_num : fl->dsaddr->stripe_count; | |
775 | ||
776 | if (cinfo->ds->nbuckets >= size) { | |
799ba8d5 FI |
777 | /* This assumes there is only one IOMODE_RW lseg. What |
778 | * we really want to do is have a layout_hdr level | |
779 | * dictionary of <multipath_list4, fh> keys, each | |
780 | * associated with a struct list_head, populated by calls | |
781 | * to filelayout_write_pagelist(). | |
782 | * */ | |
783 | return 0; | |
784 | } | |
785 | ||
ea2cf228 | 786 | buckets = kcalloc(size, sizeof(struct pnfs_commit_bucket), |
799ba8d5 FI |
787 | gfp_flags); |
788 | if (!buckets) | |
789 | return -ENOMEM; | |
dd7663e7 WAA |
790 | for (i = 0; i < size; i++) { |
791 | INIT_LIST_HEAD(&buckets[i].written); | |
792 | INIT_LIST_HEAD(&buckets[i].committing); | |
5002c586 WAA |
793 | /* mark direct verifier as unset */ |
794 | buckets[i].direct_verf.committed = NFS_INVALID_STABLE_HOW; | |
799ba8d5 | 795 | } |
dd7663e7 WAA |
796 | |
797 | spin_lock(cinfo->lock); | |
798 | if (cinfo->ds->nbuckets >= size) | |
799 | goto out; | |
800 | for (i = 0; i < cinfo->ds->nbuckets; i++) { | |
801 | list_splice(&cinfo->ds->buckets[i].written, | |
802 | &buckets[i].written); | |
803 | list_splice(&cinfo->ds->buckets[i].committing, | |
804 | &buckets[i].committing); | |
5002c586 WAA |
805 | buckets[i].direct_verf.committed = |
806 | cinfo->ds->buckets[i].direct_verf.committed; | |
dd7663e7 WAA |
807 | buckets[i].wlseg = cinfo->ds->buckets[i].wlseg; |
808 | buckets[i].clseg = cinfo->ds->buckets[i].clseg; | |
809 | } | |
810 | swap(cinfo->ds->buckets, buckets); | |
811 | cinfo->ds->nbuckets = size; | |
812 | out: | |
813 | spin_unlock(cinfo->lock); | |
814 | kfree(buckets); | |
815 | return 0; | |
799ba8d5 FI |
816 | } |
817 | ||
16b374ca AA |
818 | static struct pnfs_layout_segment * |
819 | filelayout_alloc_lseg(struct pnfs_layout_hdr *layoutid, | |
a75b9df9 TM |
820 | struct nfs4_layoutget_res *lgr, |
821 | gfp_t gfp_flags) | |
16b374ca AA |
822 | { |
823 | struct nfs4_filelayout_segment *fl; | |
824 | int rc; | |
825 | struct nfs4_deviceid id; | |
826 | ||
827 | dprintk("--> %s\n", __func__); | |
a75b9df9 | 828 | fl = kzalloc(sizeof(*fl), gfp_flags); |
16b374ca AA |
829 | if (!fl) |
830 | return NULL; | |
831 | ||
a75b9df9 TM |
832 | rc = filelayout_decode_layout(layoutid, fl, lgr, &id, gfp_flags); |
833 | if (rc != 0 || filelayout_check_layout(layoutid, fl, lgr, &id, gfp_flags)) { | |
16b374ca AA |
834 | _filelayout_free_lseg(fl); |
835 | return NULL; | |
836 | } | |
837 | return &fl->generic_hdr; | |
838 | } | |
839 | ||
94ad1c80 FI |
840 | /* |
841 | * filelayout_pg_test(). Called by nfs_can_coalesce_requests() | |
842 | * | |
b4fdac1a WAA |
843 | * Return 0 if @req cannot be coalesced into @pgio, otherwise return the number |
844 | * of bytes (maximum @req->wb_bytes) that can be coalesced. | |
94ad1c80 | 845 | */ |
b4fdac1a | 846 | static size_t |
94ad1c80 FI |
847 | filelayout_pg_test(struct nfs_pageio_descriptor *pgio, struct nfs_page *prev, |
848 | struct nfs_page *req) | |
849 | { | |
0f9c429e | 850 | unsigned int size; |
94ad1c80 | 851 | u64 p_stripe, r_stripe; |
c6194271 WAA |
852 | u32 stripe_offset; |
853 | u64 segment_offset = pgio->pg_lseg->pls_range.offset; | |
854 | u32 stripe_unit = FILELAYOUT_LSEG(pgio->pg_lseg)->stripe_unit; | |
94ad1c80 | 855 | |
0f9c429e WAA |
856 | /* calls nfs_generic_pg_test */ |
857 | size = pnfs_generic_pg_test(pgio, prev, req); | |
858 | if (!size) | |
b4fdac1a | 859 | return 0; |
89a58e32 | 860 | |
c6194271 | 861 | /* see if req and prev are in the same stripe */ |
0f9c429e | 862 | if (prev) { |
c6194271 WAA |
863 | p_stripe = (u64)req_offset(prev) - segment_offset; |
864 | r_stripe = (u64)req_offset(req) - segment_offset; | |
0f9c429e WAA |
865 | do_div(p_stripe, stripe_unit); |
866 | do_div(r_stripe, stripe_unit); | |
94ad1c80 | 867 | |
0f9c429e WAA |
868 | if (p_stripe != r_stripe) |
869 | return 0; | |
870 | } | |
c6194271 WAA |
871 | |
872 | /* calculate remaining bytes in the current stripe */ | |
873 | div_u64_rem((u64)req_offset(req) - segment_offset, | |
874 | stripe_unit, | |
875 | &stripe_offset); | |
876 | WARN_ON_ONCE(stripe_offset > stripe_unit); | |
877 | if (stripe_offset >= stripe_unit) | |
878 | return 0; | |
879 | return min(stripe_unit - (unsigned int)stripe_offset, size); | |
94ad1c80 FI |
880 | } |
881 | ||
17280175 | 882 | static void |
7c24d948 AA |
883 | filelayout_pg_init_read(struct nfs_pageio_descriptor *pgio, |
884 | struct nfs_page *req) | |
885 | { | |
c6194271 WAA |
886 | if (!pgio->pg_lseg) |
887 | pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode, | |
7c24d948 AA |
888 | req->wb_context, |
889 | 0, | |
890 | NFS4_MAX_UINT64, | |
891 | IOMODE_READ, | |
892 | GFP_KERNEL); | |
893 | /* If no lseg, fall back to read through mds */ | |
894 | if (pgio->pg_lseg == NULL) | |
1f945357 | 895 | nfs_pageio_reset_read_mds(pgio); |
7c24d948 AA |
896 | } |
897 | ||
17280175 | 898 | static void |
7c24d948 AA |
899 | filelayout_pg_init_write(struct nfs_pageio_descriptor *pgio, |
900 | struct nfs_page *req) | |
901 | { | |
ea2cf228 | 902 | struct nfs_commit_info cinfo; |
799ba8d5 FI |
903 | int status; |
904 | ||
c6194271 WAA |
905 | if (!pgio->pg_lseg) |
906 | pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode, | |
7c24d948 AA |
907 | req->wb_context, |
908 | 0, | |
909 | NFS4_MAX_UINT64, | |
910 | IOMODE_RW, | |
911 | GFP_NOFS); | |
912 | /* If no lseg, fall back to write through mds */ | |
913 | if (pgio->pg_lseg == NULL) | |
799ba8d5 | 914 | goto out_mds; |
ea2cf228 FI |
915 | nfs_init_cinfo(&cinfo, pgio->pg_inode, pgio->pg_dreq); |
916 | status = filelayout_alloc_commit_info(pgio->pg_lseg, &cinfo, GFP_NOFS); | |
799ba8d5 | 917 | if (status < 0) { |
9369a431 | 918 | pnfs_put_lseg(pgio->pg_lseg); |
799ba8d5 FI |
919 | pgio->pg_lseg = NULL; |
920 | goto out_mds; | |
921 | } | |
922 | return; | |
923 | out_mds: | |
924 | nfs_pageio_reset_write_mds(pgio); | |
7c24d948 AA |
925 | } |
926 | ||
1751c363 | 927 | static const struct nfs_pageio_ops filelayout_pg_read_ops = { |
7c24d948 | 928 | .pg_init = filelayout_pg_init_read, |
1751c363 | 929 | .pg_test = filelayout_pg_test, |
493292dd | 930 | .pg_doio = pnfs_generic_pg_readpages, |
180bb5ec | 931 | .pg_cleanup = pnfs_generic_pg_cleanup, |
1751c363 TM |
932 | }; |
933 | ||
934 | static const struct nfs_pageio_ops filelayout_pg_write_ops = { | |
7c24d948 | 935 | .pg_init = filelayout_pg_init_write, |
1751c363 | 936 | .pg_test = filelayout_pg_test, |
dce81290 | 937 | .pg_doio = pnfs_generic_pg_writepages, |
180bb5ec | 938 | .pg_cleanup = pnfs_generic_pg_cleanup, |
1751c363 TM |
939 | }; |
940 | ||
e0c2b380 FI |
941 | static u32 select_bucket_index(struct nfs4_filelayout_segment *fl, u32 j) |
942 | { | |
943 | if (fl->stripe_type == STRIPE_SPARSE) | |
944 | return nfs4_fl_calc_ds_index(&fl->generic_hdr, j); | |
945 | else | |
946 | return j; | |
947 | } | |
948 | ||
c8a3292d PT |
949 | static void |
950 | filelayout_mark_request_commit(struct nfs_page *req, | |
951 | struct pnfs_layout_segment *lseg, | |
b57ff130 WAA |
952 | struct nfs_commit_info *cinfo, |
953 | u32 ds_commit_idx) | |
c8a3292d | 954 | |
e0c2b380 | 955 | { |
e0c2b380 FI |
956 | struct nfs4_filelayout_segment *fl = FILELAYOUT_LSEG(lseg); |
957 | u32 i, j; | |
e0c2b380 | 958 | |
c8a3292d | 959 | if (fl->commit_through_mds) { |
338d00cf TH |
960 | nfs_request_add_commit_list(req, &cinfo->mds->list, cinfo); |
961 | } else { | |
962 | /* Note that we are calling nfs4_fl_calc_j_index on each page | |
963 | * that ends up being committed to a data server. An attractive | |
964 | * alternative is to add a field to nfs_write_data and nfs_page | |
965 | * to store the value calculated in filelayout_write_pagelist | |
966 | * and just use that here. | |
d6d6dc7c | 967 | */ |
338d00cf TH |
968 | j = nfs4_fl_calc_j_index(lseg, req_offset(req)); |
969 | i = select_bucket_index(fl, j); | |
970 | pnfs_layout_mark_request_commit(req, lseg, cinfo, i); | |
e0c2b380 | 971 | } |
8dd37758 TM |
972 | } |
973 | ||
e0c2b380 FI |
974 | static u32 calc_ds_index_from_commit(struct pnfs_layout_segment *lseg, u32 i) |
975 | { | |
976 | struct nfs4_filelayout_segment *flseg = FILELAYOUT_LSEG(lseg); | |
977 | ||
978 | if (flseg->stripe_type == STRIPE_SPARSE) | |
979 | return i; | |
980 | else | |
981 | return nfs4_fl_calc_ds_index(lseg, i); | |
982 | } | |
983 | ||
984 | static struct nfs_fh * | |
985 | select_ds_fh_from_commit(struct pnfs_layout_segment *lseg, u32 i) | |
986 | { | |
987 | struct nfs4_filelayout_segment *flseg = FILELAYOUT_LSEG(lseg); | |
988 | ||
989 | if (flseg->stripe_type == STRIPE_SPARSE) { | |
990 | if (flseg->num_fh == 1) | |
991 | i = 0; | |
992 | else if (flseg->num_fh == 0) | |
993 | /* Use the MDS OPEN fh set in nfs_read_rpcsetup */ | |
994 | return NULL; | |
995 | } | |
996 | return flseg->fh_array[i]; | |
997 | } | |
998 | ||
0b7c0153 | 999 | static int filelayout_initiate_commit(struct nfs_commit_data *data, int how) |
e0c2b380 FI |
1000 | { |
1001 | struct pnfs_layout_segment *lseg = data->lseg; | |
1002 | struct nfs4_pnfs_ds *ds; | |
0e20162e | 1003 | struct rpc_clnt *ds_clnt; |
e0c2b380 FI |
1004 | u32 idx; |
1005 | struct nfs_fh *fh; | |
1006 | ||
1007 | idx = calc_ds_index_from_commit(lseg, data->ds_commit_index); | |
1008 | ds = nfs4_fl_prepare_ds(lseg, idx); | |
0e20162e AA |
1009 | if (!ds) |
1010 | goto out_err; | |
1011 | ||
1012 | ds_clnt = nfs4_find_or_create_ds_client(ds->ds_clp, data->inode); | |
1013 | if (IS_ERR(ds_clnt)) | |
1014 | goto out_err; | |
1015 | ||
3a7936c3 AA |
1016 | dprintk("%s ino %lu, how %d cl_count %d\n", __func__, |
1017 | data->inode->i_ino, how, atomic_read(&ds->ds_clp->cl_count)); | |
0b7c0153 | 1018 | data->commit_done_cb = filelayout_commit_done_cb; |
3a7936c3 | 1019 | atomic_inc(&ds->ds_clp->cl_count); |
e0c2b380 FI |
1020 | data->ds_clp = ds->ds_clp; |
1021 | fh = select_ds_fh_from_commit(lseg, data->ds_commit_index); | |
1022 | if (fh) | |
1023 | data->args.fh = fh; | |
c36aae9a | 1024 | return nfs_initiate_commit(ds_clnt, data, NFS_PROTO(data->inode), |
9f0ec176 AA |
1025 | &filelayout_commit_call_ops, how, |
1026 | RPC_TASK_SOFTCONN); | |
0e20162e | 1027 | out_err: |
f54bcf2e TH |
1028 | pnfs_generic_prepare_to_resend_writes(data); |
1029 | pnfs_generic_commit_release(data); | |
0e20162e | 1030 | return -EAGAIN; |
e0c2b380 FI |
1031 | } |
1032 | ||
02d1426c WAA |
1033 | /* filelayout_search_commit_reqs - Search lists in @cinfo for the head reqest |
1034 | * for @page | |
1035 | * @cinfo - commit info for current inode | |
1036 | * @page - page to search for matching head request | |
1037 | * | |
1038 | * Returns a the head request if one is found, otherwise returns NULL. | |
1039 | */ | |
1040 | static struct nfs_page * | |
1041 | filelayout_search_commit_reqs(struct nfs_commit_info *cinfo, struct page *page) | |
1042 | { | |
1043 | struct nfs_page *freq, *t; | |
1044 | struct pnfs_commit_bucket *b; | |
1045 | int i; | |
1046 | ||
1047 | /* Linearly search the commit lists for each bucket until a matching | |
1048 | * request is found */ | |
1049 | for (i = 0, b = cinfo->ds->buckets; i < cinfo->ds->nbuckets; i++, b++) { | |
1050 | list_for_each_entry_safe(freq, t, &b->written, wb_list) { | |
1051 | if (freq->wb_page == page) | |
1052 | return freq->wb_head; | |
1053 | } | |
1054 | list_for_each_entry_safe(freq, t, &b->committing, wb_list) { | |
1055 | if (freq->wb_page == page) | |
1056 | return freq->wb_head; | |
1057 | } | |
1058 | } | |
1059 | ||
1060 | return NULL; | |
1061 | } | |
1062 | ||
e0c2b380 FI |
1063 | static int |
1064 | filelayout_commit_pagelist(struct inode *inode, struct list_head *mds_pages, | |
ea2cf228 | 1065 | int how, struct nfs_commit_info *cinfo) |
e0c2b380 | 1066 | { |
f54bcf2e TH |
1067 | return pnfs_generic_commit_pagelist(inode, mds_pages, how, cinfo, |
1068 | filelayout_initiate_commit); | |
e0c2b380 | 1069 | } |
f54bcf2e | 1070 | |
661373b1 CH |
1071 | static struct nfs4_deviceid_node * |
1072 | filelayout_alloc_deviceid_node(struct nfs_server *server, | |
1073 | struct pnfs_device *pdev, gfp_t gfp_flags) | |
1074 | { | |
1075 | struct nfs4_file_layout_dsaddr *dsaddr; | |
1076 | ||
1077 | dsaddr = nfs4_fl_alloc_deviceid_node(server, pdev, gfp_flags); | |
1078 | if (!dsaddr) | |
1079 | return NULL; | |
1080 | return &dsaddr->id_node; | |
1081 | } | |
e0c2b380 | 1082 | |
1775bc34 | 1083 | static void |
fc87701b | 1084 | filelayout_free_deviceid_node(struct nfs4_deviceid_node *d) |
1775bc34 BH |
1085 | { |
1086 | nfs4_fl_free_deviceid(container_of(d, struct nfs4_file_layout_dsaddr, id_node)); | |
1087 | } | |
1088 | ||
799ba8d5 FI |
1089 | static struct pnfs_layout_hdr * |
1090 | filelayout_alloc_layout_hdr(struct inode *inode, gfp_t gfp_flags) | |
1091 | { | |
1092 | struct nfs4_filelayout *flo; | |
1093 | ||
1094 | flo = kzalloc(sizeof(*flo), gfp_flags); | |
6df200f5 | 1095 | return flo != NULL ? &flo->generic_hdr : NULL; |
799ba8d5 FI |
1096 | } |
1097 | ||
1098 | static void | |
1099 | filelayout_free_layout_hdr(struct pnfs_layout_hdr *lo) | |
1100 | { | |
1101 | kfree(FILELAYOUT_FROM_HDR(lo)); | |
1102 | } | |
1103 | ||
ea2cf228 FI |
1104 | static struct pnfs_ds_commit_info * |
1105 | filelayout_get_ds_info(struct inode *inode) | |
1106 | { | |
df011748 FI |
1107 | struct pnfs_layout_hdr *layout = NFS_I(inode)->layout; |
1108 | ||
1109 | if (layout == NULL) | |
1110 | return NULL; | |
1111 | else | |
1112 | return &FILELAYOUT_FROM_HDR(layout)->commit_info; | |
ea2cf228 FI |
1113 | } |
1114 | ||
7ab672ce | 1115 | static struct pnfs_layoutdriver_type filelayout_type = { |
ea8eecdd CH |
1116 | .id = LAYOUT_NFSV4_1_FILES, |
1117 | .name = "LAYOUT_NFSV4_1_FILES", | |
1118 | .owner = THIS_MODULE, | |
799ba8d5 FI |
1119 | .alloc_layout_hdr = filelayout_alloc_layout_hdr, |
1120 | .free_layout_hdr = filelayout_free_layout_hdr, | |
ea8eecdd CH |
1121 | .alloc_lseg = filelayout_alloc_lseg, |
1122 | .free_lseg = filelayout_free_lseg, | |
1751c363 TM |
1123 | .pg_read_ops = &filelayout_pg_read_ops, |
1124 | .pg_write_ops = &filelayout_pg_write_ops, | |
ea2cf228 | 1125 | .get_ds_info = &filelayout_get_ds_info, |
8dd37758 | 1126 | .mark_request_commit = filelayout_mark_request_commit, |
f54bcf2e TH |
1127 | .clear_request_commit = pnfs_generic_clear_request_commit, |
1128 | .scan_commit_lists = pnfs_generic_scan_commit_lists, | |
1129 | .recover_commit_reqs = pnfs_generic_recover_commit_reqs, | |
02d1426c | 1130 | .search_commit_reqs = filelayout_search_commit_reqs, |
e0c2b380 | 1131 | .commit_pagelist = filelayout_commit_pagelist, |
dc70d7b3 | 1132 | .read_pagelist = filelayout_read_pagelist, |
0382b744 | 1133 | .write_pagelist = filelayout_write_pagelist, |
661373b1 | 1134 | .alloc_deviceid_node = filelayout_alloc_deviceid_node, |
fc87701b | 1135 | .free_deviceid_node = filelayout_free_deviceid_node, |
5bb89b47 | 1136 | .sync = pnfs_nfs_generic_sync, |
7ab672ce DH |
1137 | }; |
1138 | ||
1139 | static int __init nfs4filelayout_init(void) | |
1140 | { | |
1141 | printk(KERN_INFO "%s: NFSv4 File Layout Driver Registering...\n", | |
1142 | __func__); | |
1143 | return pnfs_register_layoutdriver(&filelayout_type); | |
1144 | } | |
1145 | ||
1146 | static void __exit nfs4filelayout_exit(void) | |
1147 | { | |
1148 | printk(KERN_INFO "%s: NFSv4 File Layout Driver Unregistering...\n", | |
1149 | __func__); | |
1150 | pnfs_unregister_layoutdriver(&filelayout_type); | |
1151 | } | |
1152 | ||
f85ef69c BF |
1153 | MODULE_ALIAS("nfs-layouttype4-1"); |
1154 | ||
7ab672ce DH |
1155 | module_init(nfs4filelayout_init); |
1156 | module_exit(nfs4filelayout_exit); |