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 | 51 | #define FILELAYOUT_POLL_RETRY_MAX (15*HZ) |
9c455a8c | 52 | static const struct pnfs_commit_ops filelayout_commit_ops; |
cbdabc7f | 53 | |
cfe7f412 FI |
54 | static loff_t |
55 | filelayout_get_dense_offset(struct nfs4_filelayout_segment *flseg, | |
56 | loff_t offset) | |
57 | { | |
58 | u32 stripe_width = flseg->stripe_unit * flseg->dsaddr->stripe_count; | |
3476f114 CM |
59 | u64 stripe_no; |
60 | u32 rem; | |
cfe7f412 FI |
61 | |
62 | offset -= flseg->pattern_offset; | |
3476f114 CM |
63 | stripe_no = div_u64(offset, stripe_width); |
64 | div_u64_rem(offset, flseg->stripe_unit, &rem); | |
cfe7f412 | 65 | |
3476f114 | 66 | return stripe_no * flseg->stripe_unit + rem; |
cfe7f412 FI |
67 | } |
68 | ||
69 | /* This function is used by the layout driver to calculate the | |
70 | * offset of the file on the dserver based on whether the | |
71 | * layout type is STRIPE_DENSE or STRIPE_SPARSE | |
72 | */ | |
73 | static loff_t | |
74 | filelayout_get_dserver_offset(struct pnfs_layout_segment *lseg, loff_t offset) | |
75 | { | |
76 | struct nfs4_filelayout_segment *flseg = FILELAYOUT_LSEG(lseg); | |
77 | ||
78 | switch (flseg->stripe_type) { | |
79 | case STRIPE_SPARSE: | |
80 | return offset; | |
81 | ||
82 | case STRIPE_DENSE: | |
83 | return filelayout_get_dense_offset(flseg, offset); | |
84 | } | |
85 | ||
86 | BUG(); | |
87 | } | |
88 | ||
d45f60c6 | 89 | static void filelayout_reset_write(struct nfs_pgio_header *hdr) |
e7dd79af | 90 | { |
d45f60c6 | 91 | struct rpc_task *task = &hdr->task; |
e7dd79af AA |
92 | |
93 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) { | |
94 | dprintk("%s Reset task %5u for i/o through MDS " | |
1e8968c5 | 95 | "(req %s/%llu, %u bytes @ offset %llu)\n", __func__, |
d45f60c6 | 96 | hdr->task.tk_pid, |
497826af | 97 | hdr->inode->i_sb->s_id, |
1e8968c5 | 98 | (unsigned long long)NFS_FILEID(hdr->inode), |
d45f60c6 WAA |
99 | hdr->args.count, |
100 | (unsigned long long)hdr->args.offset); | |
e7dd79af | 101 | |
53113ad3 | 102 | task->tk_status = pnfs_write_done_resend_to_mds(hdr); |
e7dd79af AA |
103 | } |
104 | } | |
105 | ||
d45f60c6 | 106 | static void filelayout_reset_read(struct nfs_pgio_header *hdr) |
e7dd79af | 107 | { |
d45f60c6 | 108 | struct rpc_task *task = &hdr->task; |
e7dd79af AA |
109 | |
110 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) { | |
111 | dprintk("%s Reset task %5u for i/o through MDS " | |
1e8968c5 | 112 | "(req %s/%llu, %u bytes @ offset %llu)\n", __func__, |
d45f60c6 | 113 | hdr->task.tk_pid, |
497826af | 114 | hdr->inode->i_sb->s_id, |
1e8968c5 | 115 | (unsigned long long)NFS_FILEID(hdr->inode), |
d45f60c6 WAA |
116 | hdr->args.count, |
117 | (unsigned long long)hdr->args.offset); | |
e7dd79af | 118 | |
53113ad3 | 119 | task->tk_status = pnfs_read_done_resend_to_mds(hdr); |
e7dd79af AA |
120 | } |
121 | } | |
122 | ||
cbdabc7f AA |
123 | static int filelayout_async_handle_error(struct rpc_task *task, |
124 | struct nfs4_state *state, | |
125 | struct nfs_client *clp, | |
e7dd79af | 126 | struct pnfs_layout_segment *lseg) |
cbdabc7f | 127 | { |
d527e5c1 TM |
128 | struct pnfs_layout_hdr *lo = lseg->pls_layout; |
129 | struct inode *inode = lo->plh_inode; | |
e7dd79af | 130 | struct nfs4_deviceid_node *devid = FILELAYOUT_DEVID_NODE(lseg); |
671fb896 | 131 | struct nfs4_slot_table *tbl = &clp->cl_session->fc_slot_table; |
9cb81968 | 132 | |
cbdabc7f AA |
133 | if (task->tk_status >= 0) |
134 | return 0; | |
cbdabc7f AA |
135 | |
136 | switch (task->tk_status) { | |
9cb81968 | 137 | /* DS session errors */ |
cbdabc7f AA |
138 | case -NFS4ERR_BADSESSION: |
139 | case -NFS4ERR_BADSLOT: | |
140 | case -NFS4ERR_BAD_HIGH_SLOT: | |
141 | case -NFS4ERR_DEADSESSION: | |
142 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
143 | case -NFS4ERR_SEQ_FALSE_RETRY: | |
144 | case -NFS4ERR_SEQ_MISORDERED: | |
145 | dprintk("%s ERROR %d, Reset session. Exchangeid " | |
146 | "flags 0x%x\n", __func__, task->tk_status, | |
147 | clp->cl_exchange_flags); | |
9f594791 | 148 | nfs4_schedule_session_recovery(clp->cl_session, task->tk_status); |
cbdabc7f AA |
149 | break; |
150 | case -NFS4ERR_DELAY: | |
151 | case -NFS4ERR_GRACE: | |
cbdabc7f AA |
152 | rpc_delay(task, FILELAYOUT_POLL_RETRY_MAX); |
153 | break; | |
a8a4ae3a AA |
154 | case -NFS4ERR_RETRY_UNCACHED_REP: |
155 | break; | |
041245c8 | 156 | /* Invalidate Layout errors */ |
a0bc01e0 | 157 | case -NFS4ERR_ACCESS: |
041245c8 AA |
158 | case -NFS4ERR_PNFS_NO_LAYOUT: |
159 | case -ESTALE: /* mapped NFS4ERR_STALE */ | |
160 | case -EBADHANDLE: /* mapped NFS4ERR_BADHANDLE */ | |
161 | case -EISDIR: /* mapped NFS4ERR_ISDIR */ | |
162 | case -NFS4ERR_FHEXPIRED: | |
163 | case -NFS4ERR_WRONG_TYPE: | |
164 | dprintk("%s Invalid layout error %d\n", __func__, | |
165 | task->tk_status); | |
166 | /* | |
167 | * Destroy layout so new i/o will get a new layout. | |
168 | * Layout will not be destroyed until all current lseg | |
169 | * references are put. Mark layout as invalid to resend failed | |
170 | * i/o and all i/o waiting on the slot table to the MDS until | |
171 | * layout is destroyed and a new valid layout is obtained. | |
172 | */ | |
d42e7873 | 173 | pnfs_destroy_layout(NFS_I(inode)); |
041245c8 AA |
174 | rpc_wake_up(&tbl->slot_tbl_waitq); |
175 | goto reset; | |
e7dd79af AA |
176 | /* RPC connection errors */ |
177 | case -ECONNREFUSED: | |
178 | case -EHOSTDOWN: | |
179 | case -EHOSTUNREACH: | |
180 | case -ENETUNREACH: | |
181 | case -EIO: | |
182 | case -ETIMEDOUT: | |
183 | case -EPIPE: | |
431794e6 TM |
184 | case -EPROTO: |
185 | case -ENODEV: | |
e7dd79af AA |
186 | dprintk("%s DS connection error %d\n", __func__, |
187 | task->tk_status); | |
1dfed273 | 188 | nfs4_mark_deviceid_unavailable(devid); |
c220106f | 189 | pnfs_error_mark_layout_for_return(inode, lseg); |
a0bc01e0 | 190 | pnfs_set_lo_fail(lseg); |
671fb896 | 191 | rpc_wake_up(&tbl->slot_tbl_waitq); |
df561f66 | 192 | fallthrough; |
cbdabc7f | 193 | default: |
041245c8 | 194 | reset: |
e7dd79af | 195 | dprintk("%s Retry through MDS. Error %d\n", __func__, |
cbdabc7f | 196 | task->tk_status); |
e7dd79af | 197 | return -NFS4ERR_RESET_TO_MDS; |
cbdabc7f AA |
198 | } |
199 | task->tk_status = 0; | |
200 | return -EAGAIN; | |
201 | } | |
202 | ||
203 | /* NFS_PROTO call done callback routines */ | |
204 | ||
205 | static int filelayout_read_done_cb(struct rpc_task *task, | |
d45f60c6 | 206 | struct nfs_pgio_header *hdr) |
cbdabc7f | 207 | { |
e7dd79af | 208 | int err; |
cbdabc7f | 209 | |
d45f60c6 WAA |
210 | trace_nfs4_pnfs_read(hdr, task->tk_status); |
211 | err = filelayout_async_handle_error(task, hdr->args.context->state, | |
212 | hdr->ds_clp, hdr->lseg); | |
cbdabc7f | 213 | |
e7dd79af AA |
214 | switch (err) { |
215 | case -NFS4ERR_RESET_TO_MDS: | |
d45f60c6 | 216 | filelayout_reset_read(hdr); |
e7dd79af AA |
217 | return task->tk_status; |
218 | case -EAGAIN: | |
d00c5d43 | 219 | rpc_restart_call_prepare(task); |
cbdabc7f AA |
220 | return -EAGAIN; |
221 | } | |
222 | ||
223 | return 0; | |
224 | } | |
225 | ||
863a3c6c AA |
226 | /* |
227 | * We reference the rpc_cred of the first WRITE that triggers the need for | |
228 | * a LAYOUTCOMMIT, and use it to send the layoutcommit compound. | |
229 | * rfc5661 is not clear about which credential should be used. | |
230 | */ | |
231 | static void | |
d45f60c6 | 232 | filelayout_set_layoutcommit(struct nfs_pgio_header *hdr) |
863a3c6c | 233 | { |
2e18d4d8 | 234 | loff_t end_offs = 0; |
cd841605 FI |
235 | |
236 | if (FILELAYOUT_LSEG(hdr->lseg)->commit_through_mds || | |
2e18d4d8 | 237 | hdr->res.verf->committed == NFS_FILE_SYNC) |
863a3c6c | 238 | return; |
2e18d4d8 TM |
239 | if (hdr->res.verf->committed == NFS_DATA_SYNC) |
240 | end_offs = hdr->mds_offset + (loff_t)hdr->res.count; | |
863a3c6c | 241 | |
2e18d4d8 TM |
242 | /* Note: if the write is unstable, don't set end_offs until commit */ |
243 | pnfs_set_layoutcommit(hdr->inode, hdr->lseg, end_offs); | |
f383b7e8 | 244 | dprintk("%s inode %lu pls_end_pos %lu\n", __func__, hdr->inode->i_ino, |
cd841605 | 245 | (unsigned long) NFS_I(hdr->inode)->layout->plh_lwb); |
863a3c6c AA |
246 | } |
247 | ||
1dfed273 TM |
248 | bool |
249 | filelayout_test_devid_unavailable(struct nfs4_deviceid_node *node) | |
250 | { | |
251 | return filelayout_test_devid_invalid(node) || | |
252 | nfs4_test_deviceid_unavailable(node); | |
253 | } | |
254 | ||
255 | static bool | |
256 | filelayout_reset_to_mds(struct pnfs_layout_segment *lseg) | |
257 | { | |
258 | struct nfs4_deviceid_node *node = FILELAYOUT_DEVID_NODE(lseg); | |
259 | ||
8006bfba | 260 | return filelayout_test_devid_unavailable(node); |
1dfed273 TM |
261 | } |
262 | ||
dc70d7b3 AA |
263 | /* |
264 | * Call ops for the async read/write cases | |
265 | * In the case of dense layouts, the offset needs to be reset to its | |
266 | * original value. | |
267 | */ | |
268 | static void filelayout_read_prepare(struct rpc_task *task, void *data) | |
269 | { | |
d45f60c6 | 270 | struct nfs_pgio_header *hdr = data; |
dc70d7b3 | 271 | |
d45f60c6 | 272 | if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags))) { |
c58c8441 TM |
273 | rpc_exit(task, -EIO); |
274 | return; | |
275 | } | |
d45f60c6 | 276 | if (filelayout_reset_to_mds(hdr->lseg)) { |
0ad2f378 | 277 | dprintk("%s task %u reset io to MDS\n", __func__, task->tk_pid); |
d45f60c6 | 278 | filelayout_reset_read(hdr); |
0ad2f378 AA |
279 | rpc_exit(task, 0); |
280 | return; | |
281 | } | |
d45f60c6 | 282 | hdr->pgio_done_cb = filelayout_read_done_cb; |
cbdabc7f | 283 | |
6de7e12f | 284 | if (nfs4_setup_sequence(hdr->ds_clp, |
d45f60c6 WAA |
285 | &hdr->args.seq_args, |
286 | &hdr->res.seq_res, | |
9b206149 TM |
287 | task)) |
288 | return; | |
d45f60c6 WAA |
289 | if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context, |
290 | hdr->args.lock_context, FMODE_READ) == -EIO) | |
869a9d37 | 291 | rpc_exit(task, -EIO); /* lost lock, terminate I/O */ |
dc70d7b3 AA |
292 | } |
293 | ||
294 | static void filelayout_read_call_done(struct rpc_task *task, void *data) | |
295 | { | |
d45f60c6 | 296 | struct nfs_pgio_header *hdr = data; |
dc70d7b3 | 297 | |
d45f60c6 | 298 | if (test_bit(NFS_IOHDR_REDO, &hdr->flags) && |
f9c96fcc | 299 | task->tk_status == 0) { |
d45f60c6 | 300 | nfs41_sequence_done(task, &hdr->res.seq_res); |
0ad2f378 | 301 | return; |
f9c96fcc | 302 | } |
0ad2f378 | 303 | |
dc70d7b3 | 304 | /* Note this may cause RPC to be resent */ |
d45f60c6 | 305 | hdr->mds_ops->rpc_call_done(task, data); |
dc70d7b3 AA |
306 | } |
307 | ||
0a702195 WAA |
308 | static void filelayout_read_count_stats(struct rpc_task *task, void *data) |
309 | { | |
d45f60c6 | 310 | struct nfs_pgio_header *hdr = data; |
0a702195 | 311 | |
d45f60c6 | 312 | rpc_count_iostats(task, NFS_SERVER(hdr->inode)->client->cl_metrics); |
0a702195 WAA |
313 | } |
314 | ||
a69aef14 | 315 | static int filelayout_write_done_cb(struct rpc_task *task, |
d45f60c6 | 316 | struct nfs_pgio_header *hdr) |
a69aef14 | 317 | { |
e7dd79af AA |
318 | int err; |
319 | ||
d45f60c6 WAA |
320 | trace_nfs4_pnfs_write(hdr, task->tk_status); |
321 | err = filelayout_async_handle_error(task, hdr->args.context->state, | |
322 | hdr->ds_clp, hdr->lseg); | |
e7dd79af AA |
323 | |
324 | switch (err) { | |
325 | case -NFS4ERR_RESET_TO_MDS: | |
d45f60c6 | 326 | filelayout_reset_write(hdr); |
e7dd79af AA |
327 | return task->tk_status; |
328 | case -EAGAIN: | |
d00c5d43 | 329 | rpc_restart_call_prepare(task); |
a69aef14 FI |
330 | return -EAGAIN; |
331 | } | |
332 | ||
d45f60c6 | 333 | filelayout_set_layoutcommit(hdr); |
e033fb51 TM |
334 | |
335 | /* zero out the fattr */ | |
336 | hdr->fattr.valid = 0; | |
337 | if (task->tk_status >= 0) | |
338 | nfs_writeback_update_inode(hdr); | |
339 | ||
a69aef14 FI |
340 | return 0; |
341 | } | |
342 | ||
e0c2b380 | 343 | static int filelayout_commit_done_cb(struct rpc_task *task, |
0b7c0153 | 344 | struct nfs_commit_data *data) |
e0c2b380 | 345 | { |
e7dd79af AA |
346 | int err; |
347 | ||
cc668ab3 | 348 | trace_nfs4_pnfs_commit_ds(data, task->tk_status); |
e7dd79af AA |
349 | err = filelayout_async_handle_error(task, NULL, data->ds_clp, |
350 | data->lseg); | |
351 | ||
352 | switch (err) { | |
353 | case -NFS4ERR_RESET_TO_MDS: | |
f54bcf2e | 354 | pnfs_generic_prepare_to_resend_writes(data); |
e7dd79af AA |
355 | return -EAGAIN; |
356 | case -EAGAIN: | |
357 | rpc_restart_call_prepare(task); | |
e0c2b380 FI |
358 | return -EAGAIN; |
359 | } | |
360 | ||
73e6c5d8 | 361 | pnfs_set_layoutcommit(data->inode, data->lseg, data->lwb); |
bc7d4b8f | 362 | |
e0c2b380 FI |
363 | return 0; |
364 | } | |
365 | ||
a69aef14 FI |
366 | static void filelayout_write_prepare(struct rpc_task *task, void *data) |
367 | { | |
d45f60c6 | 368 | struct nfs_pgio_header *hdr = data; |
a69aef14 | 369 | |
d45f60c6 | 370 | if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags))) { |
c58c8441 TM |
371 | rpc_exit(task, -EIO); |
372 | return; | |
373 | } | |
d45f60c6 | 374 | if (filelayout_reset_to_mds(hdr->lseg)) { |
0ad2f378 | 375 | dprintk("%s task %u reset io to MDS\n", __func__, task->tk_pid); |
d45f60c6 | 376 | filelayout_reset_write(hdr); |
0ad2f378 AA |
377 | rpc_exit(task, 0); |
378 | return; | |
379 | } | |
6de7e12f | 380 | if (nfs4_setup_sequence(hdr->ds_clp, |
d45f60c6 WAA |
381 | &hdr->args.seq_args, |
382 | &hdr->res.seq_res, | |
9b206149 TM |
383 | task)) |
384 | return; | |
d45f60c6 WAA |
385 | if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context, |
386 | hdr->args.lock_context, FMODE_WRITE) == -EIO) | |
869a9d37 | 387 | rpc_exit(task, -EIO); /* lost lock, terminate I/O */ |
a69aef14 FI |
388 | } |
389 | ||
390 | static void filelayout_write_call_done(struct rpc_task *task, void *data) | |
391 | { | |
d45f60c6 | 392 | struct nfs_pgio_header *hdr = data; |
a69aef14 | 393 | |
d45f60c6 | 394 | if (test_bit(NFS_IOHDR_REDO, &hdr->flags) && |
f9c96fcc | 395 | task->tk_status == 0) { |
d45f60c6 | 396 | nfs41_sequence_done(task, &hdr->res.seq_res); |
0ad2f378 | 397 | return; |
f9c96fcc | 398 | } |
0ad2f378 | 399 | |
a69aef14 | 400 | /* Note this may cause RPC to be resent */ |
d45f60c6 | 401 | hdr->mds_ops->rpc_call_done(task, data); |
a69aef14 FI |
402 | } |
403 | ||
0a702195 WAA |
404 | static void filelayout_write_count_stats(struct rpc_task *task, void *data) |
405 | { | |
d45f60c6 | 406 | struct nfs_pgio_header *hdr = data; |
0a702195 | 407 | |
d45f60c6 | 408 | rpc_count_iostats(task, NFS_SERVER(hdr->inode)->client->cl_metrics); |
0a702195 WAA |
409 | } |
410 | ||
0b7c0153 | 411 | static void filelayout_commit_prepare(struct rpc_task *task, void *data) |
e0c2b380 | 412 | { |
0b7c0153 | 413 | struct nfs_commit_data *wdata = data; |
e0c2b380 | 414 | |
6de7e12f | 415 | nfs4_setup_sequence(wdata->ds_clp, |
d9afbd1b TM |
416 | &wdata->args.seq_args, |
417 | &wdata->res.seq_res, | |
418 | task); | |
0b7c0153 FI |
419 | } |
420 | ||
0b7c0153 FI |
421 | static void filelayout_commit_count_stats(struct rpc_task *task, void *data) |
422 | { | |
423 | struct nfs_commit_data *cdata = data; | |
424 | ||
425 | rpc_count_iostats(task, NFS_SERVER(cdata->inode)->client->cl_metrics); | |
426 | } | |
427 | ||
17280175 | 428 | static const struct rpc_call_ops filelayout_read_call_ops = { |
dc70d7b3 AA |
429 | .rpc_call_prepare = filelayout_read_prepare, |
430 | .rpc_call_done = filelayout_read_call_done, | |
0a702195 | 431 | .rpc_count_stats = filelayout_read_count_stats, |
f54bcf2e | 432 | .rpc_release = pnfs_generic_rw_release, |
dc70d7b3 AA |
433 | }; |
434 | ||
17280175 | 435 | static const struct rpc_call_ops filelayout_write_call_ops = { |
a69aef14 FI |
436 | .rpc_call_prepare = filelayout_write_prepare, |
437 | .rpc_call_done = filelayout_write_call_done, | |
0a702195 | 438 | .rpc_count_stats = filelayout_write_count_stats, |
f54bcf2e | 439 | .rpc_release = pnfs_generic_rw_release, |
a69aef14 FI |
440 | }; |
441 | ||
17280175 | 442 | static const struct rpc_call_ops filelayout_commit_call_ops = { |
0b7c0153 | 443 | .rpc_call_prepare = filelayout_commit_prepare, |
f54bcf2e | 444 | .rpc_call_done = pnfs_generic_write_commit_done, |
0b7c0153 | 445 | .rpc_count_stats = filelayout_commit_count_stats, |
f54bcf2e | 446 | .rpc_release = pnfs_generic_commit_release, |
e0c2b380 FI |
447 | }; |
448 | ||
dc70d7b3 | 449 | static enum pnfs_try_status |
d45f60c6 | 450 | filelayout_read_pagelist(struct nfs_pgio_header *hdr) |
dc70d7b3 | 451 | { |
cd841605 | 452 | struct pnfs_layout_segment *lseg = hdr->lseg; |
dc70d7b3 | 453 | struct nfs4_pnfs_ds *ds; |
0e20162e | 454 | struct rpc_clnt *ds_clnt; |
d45f60c6 | 455 | loff_t offset = hdr->args.offset; |
dc70d7b3 AA |
456 | u32 j, idx; |
457 | struct nfs_fh *fh; | |
dc70d7b3 | 458 | |
5b5e0928 | 459 | dprintk("--> %s ino %lu pgbase %u req %zu@%llu\n", |
cd841605 | 460 | __func__, hdr->inode->i_ino, |
d45f60c6 | 461 | hdr->args.pgbase, (size_t)hdr->args.count, offset); |
dc70d7b3 AA |
462 | |
463 | /* Retrieve the correct rpc_client for the byte range */ | |
464 | j = nfs4_fl_calc_j_index(lseg, offset); | |
465 | idx = nfs4_fl_calc_ds_index(lseg, j); | |
466 | ds = nfs4_fl_prepare_ds(lseg, idx); | |
90fecfcb | 467 | if (!ds) |
dc70d7b3 | 468 | return PNFS_NOT_ATTEMPTED; |
0e20162e AA |
469 | |
470 | ds_clnt = nfs4_find_or_create_ds_client(ds->ds_clp, hdr->inode); | |
471 | if (IS_ERR(ds_clnt)) | |
472 | return PNFS_NOT_ATTEMPTED; | |
473 | ||
3a7936c3 | 474 | dprintk("%s USE DS: %s cl_count %d\n", __func__, |
212bf41d | 475 | ds->ds_remotestr, refcount_read(&ds->ds_clp->cl_count)); |
dc70d7b3 AA |
476 | |
477 | /* No multipath support. Use first DS */ | |
212bf41d | 478 | refcount_inc(&ds->ds_clp->cl_count); |
d45f60c6 | 479 | hdr->ds_clp = ds->ds_clp; |
6cccbb6f | 480 | hdr->ds_commit_idx = idx; |
dc70d7b3 AA |
481 | fh = nfs4_fl_select_ds_fh(lseg, j); |
482 | if (fh) | |
d45f60c6 | 483 | hdr->args.fh = fh; |
dc70d7b3 | 484 | |
d45f60c6 WAA |
485 | hdr->args.offset = filelayout_get_dserver_offset(lseg, offset); |
486 | hdr->mds_offset = offset; | |
dc70d7b3 AA |
487 | |
488 | /* Perform an asynchronous read to ds */ | |
46a5ab47 PT |
489 | nfs_initiate_pgio(ds_clnt, hdr, hdr->cred, |
490 | NFS_PROTO(hdr->inode), &filelayout_read_call_ops, | |
491 | 0, RPC_TASK_SOFTCONN); | |
dc70d7b3 AA |
492 | return PNFS_ATTEMPTED; |
493 | } | |
494 | ||
a69aef14 | 495 | /* Perform async writes. */ |
0382b744 | 496 | static enum pnfs_try_status |
d45f60c6 | 497 | filelayout_write_pagelist(struct nfs_pgio_header *hdr, int sync) |
0382b744 | 498 | { |
cd841605 | 499 | struct pnfs_layout_segment *lseg = hdr->lseg; |
a69aef14 | 500 | struct nfs4_pnfs_ds *ds; |
0e20162e | 501 | struct rpc_clnt *ds_clnt; |
d45f60c6 | 502 | loff_t offset = hdr->args.offset; |
a69aef14 FI |
503 | u32 j, idx; |
504 | struct nfs_fh *fh; | |
a69aef14 FI |
505 | |
506 | /* Retrieve the correct rpc_client for the byte range */ | |
507 | j = nfs4_fl_calc_j_index(lseg, offset); | |
508 | idx = nfs4_fl_calc_ds_index(lseg, j); | |
509 | ds = nfs4_fl_prepare_ds(lseg, idx); | |
90fecfcb | 510 | if (!ds) |
a69aef14 | 511 | return PNFS_NOT_ATTEMPTED; |
0e20162e AA |
512 | |
513 | ds_clnt = nfs4_find_or_create_ds_client(ds->ds_clp, hdr->inode); | |
514 | if (IS_ERR(ds_clnt)) | |
515 | return PNFS_NOT_ATTEMPTED; | |
516 | ||
5b5e0928 | 517 | dprintk("%s ino %lu sync %d req %zu@%llu DS: %s cl_count %d\n", |
d45f60c6 | 518 | __func__, hdr->inode->i_ino, sync, (size_t) hdr->args.count, |
212bf41d | 519 | offset, ds->ds_remotestr, refcount_read(&ds->ds_clp->cl_count)); |
a69aef14 | 520 | |
d45f60c6 | 521 | hdr->pgio_done_cb = filelayout_write_done_cb; |
212bf41d | 522 | refcount_inc(&ds->ds_clp->cl_count); |
d45f60c6 | 523 | hdr->ds_clp = ds->ds_clp; |
6cccbb6f | 524 | hdr->ds_commit_idx = idx; |
a69aef14 FI |
525 | fh = nfs4_fl_select_ds_fh(lseg, j); |
526 | if (fh) | |
d45f60c6 WAA |
527 | hdr->args.fh = fh; |
528 | hdr->args.offset = filelayout_get_dserver_offset(lseg, offset); | |
a69aef14 FI |
529 | |
530 | /* Perform an asynchronous write */ | |
46a5ab47 PT |
531 | nfs_initiate_pgio(ds_clnt, hdr, hdr->cred, |
532 | NFS_PROTO(hdr->inode), &filelayout_write_call_ops, | |
533 | sync, RPC_TASK_SOFTCONN); | |
a69aef14 | 534 | return PNFS_ATTEMPTED; |
0382b744 AA |
535 | } |
536 | ||
8d40b0f1 AA |
537 | static int |
538 | filelayout_check_deviceid(struct pnfs_layout_hdr *lo, | |
539 | struct nfs4_filelayout_segment *fl, | |
540 | gfp_t gfp_flags) | |
541 | { | |
542 | struct nfs4_deviceid_node *d; | |
543 | struct nfs4_file_layout_dsaddr *dsaddr; | |
544 | int status = -EINVAL; | |
545 | ||
1ebf9801 TM |
546 | /* Is the deviceid already set? If so, we're good. */ |
547 | if (fl->dsaddr != NULL) | |
548 | return 0; | |
549 | ||
8d40b0f1 AA |
550 | /* find and reference the deviceid */ |
551 | d = nfs4_find_get_deviceid(NFS_SERVER(lo->plh_inode), &fl->deviceid, | |
552 | lo->plh_lc_cred, gfp_flags); | |
553 | if (d == NULL) | |
554 | goto out; | |
555 | ||
556 | dsaddr = container_of(d, struct nfs4_file_layout_dsaddr, id_node); | |
557 | /* Found deviceid is unavailable */ | |
558 | if (filelayout_test_devid_unavailable(&dsaddr->id_node)) | |
559 | goto out_put; | |
560 | ||
8d40b0f1 AA |
561 | if (fl->first_stripe_index >= dsaddr->stripe_count) { |
562 | dprintk("%s Bad first_stripe_index %u\n", | |
563 | __func__, fl->first_stripe_index); | |
564 | goto out_put; | |
565 | } | |
566 | ||
567 | if ((fl->stripe_type == STRIPE_SPARSE && | |
568 | fl->num_fh > 1 && fl->num_fh != dsaddr->ds_num) || | |
569 | (fl->stripe_type == STRIPE_DENSE && | |
570 | fl->num_fh != dsaddr->stripe_count)) { | |
571 | dprintk("%s num_fh %u not valid for given packing\n", | |
572 | __func__, fl->num_fh); | |
573 | goto out_put; | |
574 | } | |
575 | status = 0; | |
1ebf9801 TM |
576 | |
577 | /* | |
578 | * Atomic compare and xchange to ensure we don't scribble | |
579 | * over a non-NULL pointer. | |
580 | */ | |
581 | if (cmpxchg(&fl->dsaddr, NULL, dsaddr) != NULL) | |
582 | goto out_put; | |
8d40b0f1 AA |
583 | out: |
584 | return status; | |
585 | out_put: | |
586 | nfs4_fl_put_deviceid(dsaddr); | |
587 | goto out; | |
588 | } | |
589 | ||
16b374ca AA |
590 | /* |
591 | * filelayout_check_layout() | |
592 | * | |
593 | * Make sure layout segment parameters are sane WRT the device. | |
594 | * At this point no generic layer initialization of the lseg has occurred, | |
595 | * and nothing has been added to the layout_hdr cache. | |
596 | * | |
597 | */ | |
598 | static int | |
599 | filelayout_check_layout(struct pnfs_layout_hdr *lo, | |
600 | struct nfs4_filelayout_segment *fl, | |
601 | struct nfs4_layoutget_res *lgr, | |
a75b9df9 | 602 | gfp_t gfp_flags) |
16b374ca | 603 | { |
16b374ca | 604 | int status = -EINVAL; |
16b374ca AA |
605 | |
606 | dprintk("--> %s\n", __func__); | |
607 | ||
7c24d948 AA |
608 | /* FIXME: remove this check when layout segment support is added */ |
609 | if (lgr->range.offset != 0 || | |
610 | lgr->range.length != NFS4_MAX_UINT64) { | |
611 | dprintk("%s Only whole file layouts supported. Use MDS i/o\n", | |
612 | __func__); | |
613 | goto out; | |
614 | } | |
615 | ||
16b374ca | 616 | if (fl->pattern_offset > lgr->range.offset) { |
3b6445a6 | 617 | dprintk("%s pattern_offset %lld too large\n", |
16b374ca AA |
618 | __func__, fl->pattern_offset); |
619 | goto out; | |
620 | } | |
621 | ||
c6194271 | 622 | if (!fl->stripe_unit) { |
75247aff | 623 | dprintk("%s Invalid stripe unit (%u)\n", |
16b374ca AA |
624 | __func__, fl->stripe_unit); |
625 | goto out; | |
626 | } | |
627 | ||
16b374ca AA |
628 | status = 0; |
629 | out: | |
630 | dprintk("--> %s returns %d\n", __func__, status); | |
631 | return status; | |
16b374ca AA |
632 | } |
633 | ||
3ec0c979 | 634 | static void _filelayout_free_lseg(struct nfs4_filelayout_segment *fl) |
16b374ca AA |
635 | { |
636 | int i; | |
637 | ||
3ec0c979 KM |
638 | if (fl->fh_array) { |
639 | for (i = 0; i < fl->num_fh; i++) { | |
640 | if (!fl->fh_array[i]) | |
641 | break; | |
642 | kfree(fl->fh_array[i]); | |
643 | } | |
644 | kfree(fl->fh_array); | |
16b374ca | 645 | } |
16b374ca AA |
646 | kfree(fl); |
647 | } | |
648 | ||
649 | static int | |
650 | filelayout_decode_layout(struct pnfs_layout_hdr *flo, | |
651 | struct nfs4_filelayout_segment *fl, | |
652 | struct nfs4_layoutget_res *lgr, | |
a75b9df9 | 653 | gfp_t gfp_flags) |
16b374ca | 654 | { |
35124a09 | 655 | struct xdr_stream stream; |
f7da7a12 | 656 | struct xdr_buf buf; |
35124a09 WAA |
657 | struct page *scratch; |
658 | __be32 *p; | |
16b374ca AA |
659 | uint32_t nfl_util; |
660 | int i; | |
661 | ||
662 | dprintk("%s: set_layout_map Begin\n", __func__); | |
663 | ||
a75b9df9 | 664 | scratch = alloc_page(gfp_flags); |
35124a09 WAA |
665 | if (!scratch) |
666 | return -ENOMEM; | |
667 | ||
f7da7a12 | 668 | xdr_init_decode_pages(&stream, &buf, lgr->layoutp->pages, lgr->layoutp->len); |
0ae4c3e8 | 669 | xdr_set_scratch_page(&stream, scratch); |
35124a09 WAA |
670 | |
671 | /* 20 = ufl_util (4), first_stripe_index (4), pattern_offset (8), | |
672 | * num_fh (4) */ | |
673 | p = xdr_inline_decode(&stream, NFS4_DEVICEID4_SIZE + 20); | |
674 | if (unlikely(!p)) | |
675 | goto out_err; | |
676 | ||
629dc870 | 677 | memcpy(&fl->deviceid, p, sizeof(fl->deviceid)); |
16b374ca | 678 | p += XDR_QUADLEN(NFS4_DEVICEID4_SIZE); |
629dc870 | 679 | nfs4_print_deviceid(&fl->deviceid); |
16b374ca AA |
680 | |
681 | nfl_util = be32_to_cpup(p++); | |
682 | if (nfl_util & NFL4_UFLG_COMMIT_THRU_MDS) | |
683 | fl->commit_through_mds = 1; | |
684 | if (nfl_util & NFL4_UFLG_DENSE) | |
685 | fl->stripe_type = STRIPE_DENSE; | |
686 | else | |
687 | fl->stripe_type = STRIPE_SPARSE; | |
688 | fl->stripe_unit = nfl_util & ~NFL4_UFLG_MASK; | |
689 | ||
690 | fl->first_stripe_index = be32_to_cpup(p++); | |
691 | p = xdr_decode_hyper(p, &fl->pattern_offset); | |
692 | fl->num_fh = be32_to_cpup(p++); | |
693 | ||
694 | dprintk("%s: nfl_util 0x%X num_fh %u fsi %u po %llu\n", | |
695 | __func__, nfl_util, fl->num_fh, fl->first_stripe_index, | |
696 | fl->pattern_offset); | |
697 | ||
cec765cf AA |
698 | /* Note that a zero value for num_fh is legal for STRIPE_SPARSE. |
699 | * Futher checking is done in filelayout_check_layout */ | |
e414966b | 700 | if (fl->num_fh > |
cec765cf | 701 | max(NFS4_PNFS_MAX_STRIPE_CNT, NFS4_PNFS_MAX_MULTI_CNT)) |
35124a09 WAA |
702 | goto out_err; |
703 | ||
cec765cf | 704 | if (fl->num_fh > 0) { |
1813badd | 705 | fl->fh_array = kcalloc(fl->num_fh, sizeof(fl->fh_array[0]), |
cec765cf AA |
706 | gfp_flags); |
707 | if (!fl->fh_array) | |
708 | goto out_err; | |
709 | } | |
16b374ca AA |
710 | |
711 | for (i = 0; i < fl->num_fh; i++) { | |
712 | /* Do we want to use a mempool here? */ | |
a75b9df9 | 713 | fl->fh_array[i] = kmalloc(sizeof(struct nfs_fh), gfp_flags); |
35124a09 | 714 | if (!fl->fh_array[i]) |
3ec0c979 | 715 | goto out_err; |
35124a09 WAA |
716 | |
717 | p = xdr_inline_decode(&stream, 4); | |
718 | if (unlikely(!p)) | |
3ec0c979 | 719 | goto out_err; |
16b374ca | 720 | fl->fh_array[i]->size = be32_to_cpup(p++); |
769b01ea | 721 | if (fl->fh_array[i]->size > NFS_MAXFHSIZE) { |
f9fd2d9c | 722 | printk(KERN_ERR "NFS: Too big fh %d received %d\n", |
16b374ca | 723 | i, fl->fh_array[i]->size); |
3ec0c979 | 724 | goto out_err; |
16b374ca | 725 | } |
35124a09 WAA |
726 | |
727 | p = xdr_inline_decode(&stream, fl->fh_array[i]->size); | |
728 | if (unlikely(!p)) | |
3ec0c979 | 729 | goto out_err; |
16b374ca | 730 | memcpy(fl->fh_array[i]->data, p, fl->fh_array[i]->size); |
16b374ca AA |
731 | dprintk("DEBUG: %s: fh len %d\n", __func__, |
732 | fl->fh_array[i]->size); | |
733 | } | |
734 | ||
35124a09 | 735 | __free_page(scratch); |
16b374ca | 736 | return 0; |
35124a09 | 737 | |
35124a09 WAA |
738 | out_err: |
739 | __free_page(scratch); | |
740 | return -EIO; | |
16b374ca AA |
741 | } |
742 | ||
c879513e FI |
743 | static void |
744 | filelayout_free_lseg(struct pnfs_layout_segment *lseg) | |
745 | { | |
746 | struct nfs4_filelayout_segment *fl = FILELAYOUT_LSEG(lseg); | |
747 | ||
748 | dprintk("--> %s\n", __func__); | |
0a47df11 SM |
749 | if (fl->dsaddr != NULL) |
750 | nfs4_fl_put_deviceid(fl->dsaddr); | |
799ba8d5 FI |
751 | /* This assumes a single RW lseg */ |
752 | if (lseg->pls_range.iomode == IOMODE_RW) { | |
753 | struct nfs4_filelayout *flo; | |
a9901899 | 754 | struct inode *inode; |
799ba8d5 FI |
755 | |
756 | flo = FILELAYOUT_FROM_HDR(lseg->pls_layout); | |
a9901899 TM |
757 | inode = flo->generic_hdr.plh_inode; |
758 | spin_lock(&inode->i_lock); | |
a9901899 TM |
759 | pnfs_generic_ds_cinfo_release_lseg(&flo->commit_info, lseg); |
760 | spin_unlock(&inode->i_lock); | |
799ba8d5 | 761 | } |
c879513e FI |
762 | _filelayout_free_lseg(fl); |
763 | } | |
764 | ||
16b374ca AA |
765 | static struct pnfs_layout_segment * |
766 | filelayout_alloc_lseg(struct pnfs_layout_hdr *layoutid, | |
a75b9df9 TM |
767 | struct nfs4_layoutget_res *lgr, |
768 | gfp_t gfp_flags) | |
16b374ca AA |
769 | { |
770 | struct nfs4_filelayout_segment *fl; | |
771 | int rc; | |
16b374ca AA |
772 | |
773 | dprintk("--> %s\n", __func__); | |
a75b9df9 | 774 | fl = kzalloc(sizeof(*fl), gfp_flags); |
16b374ca AA |
775 | if (!fl) |
776 | return NULL; | |
777 | ||
629dc870 AA |
778 | rc = filelayout_decode_layout(layoutid, fl, lgr, gfp_flags); |
779 | if (rc != 0 || filelayout_check_layout(layoutid, fl, lgr, gfp_flags)) { | |
16b374ca AA |
780 | _filelayout_free_lseg(fl); |
781 | return NULL; | |
782 | } | |
783 | return &fl->generic_hdr; | |
784 | } | |
785 | ||
94ad1c80 FI |
786 | /* |
787 | * filelayout_pg_test(). Called by nfs_can_coalesce_requests() | |
788 | * | |
b4fdac1a WAA |
789 | * Return 0 if @req cannot be coalesced into @pgio, otherwise return the number |
790 | * of bytes (maximum @req->wb_bytes) that can be coalesced. | |
94ad1c80 | 791 | */ |
b4fdac1a | 792 | static size_t |
94ad1c80 FI |
793 | filelayout_pg_test(struct nfs_pageio_descriptor *pgio, struct nfs_page *prev, |
794 | struct nfs_page *req) | |
795 | { | |
0f9c429e | 796 | unsigned int size; |
94ad1c80 | 797 | u64 p_stripe, r_stripe; |
c6194271 WAA |
798 | u32 stripe_offset; |
799 | u64 segment_offset = pgio->pg_lseg->pls_range.offset; | |
800 | u32 stripe_unit = FILELAYOUT_LSEG(pgio->pg_lseg)->stripe_unit; | |
94ad1c80 | 801 | |
0f9c429e WAA |
802 | /* calls nfs_generic_pg_test */ |
803 | size = pnfs_generic_pg_test(pgio, prev, req); | |
804 | if (!size) | |
b4fdac1a | 805 | return 0; |
89a58e32 | 806 | |
c6194271 | 807 | /* see if req and prev are in the same stripe */ |
0f9c429e | 808 | if (prev) { |
c6194271 WAA |
809 | p_stripe = (u64)req_offset(prev) - segment_offset; |
810 | r_stripe = (u64)req_offset(req) - segment_offset; | |
0f9c429e WAA |
811 | do_div(p_stripe, stripe_unit); |
812 | do_div(r_stripe, stripe_unit); | |
94ad1c80 | 813 | |
0f9c429e WAA |
814 | if (p_stripe != r_stripe) |
815 | return 0; | |
816 | } | |
c6194271 WAA |
817 | |
818 | /* calculate remaining bytes in the current stripe */ | |
819 | div_u64_rem((u64)req_offset(req) - segment_offset, | |
820 | stripe_unit, | |
821 | &stripe_offset); | |
822 | WARN_ON_ONCE(stripe_offset > stripe_unit); | |
823 | if (stripe_offset >= stripe_unit) | |
824 | return 0; | |
825 | return min(stripe_unit - (unsigned int)stripe_offset, size); | |
94ad1c80 FI |
826 | } |
827 | ||
8d40b0f1 AA |
828 | static struct pnfs_layout_segment * |
829 | fl_pnfs_update_layout(struct inode *ino, | |
830 | struct nfs_open_context *ctx, | |
831 | loff_t pos, | |
832 | u64 count, | |
833 | enum pnfs_iomode iomode, | |
834 | bool strict_iomode, | |
835 | gfp_t gfp_flags) | |
836 | { | |
837 | struct pnfs_layout_segment *lseg = NULL; | |
838 | struct pnfs_layout_hdr *lo; | |
839 | struct nfs4_filelayout_segment *fl; | |
840 | int status; | |
841 | ||
842 | lseg = pnfs_update_layout(ino, ctx, pos, count, iomode, strict_iomode, | |
843 | gfp_flags); | |
126966dd TM |
844 | if (IS_ERR(lseg)) { |
845 | /* Fall back to MDS on recoverable errors */ | |
846 | if (!nfs_error_is_fatal_on_server(PTR_ERR(lseg))) | |
847 | lseg = NULL; | |
848 | goto out; | |
849 | } else if (!lseg) | |
8d40b0f1 AA |
850 | goto out; |
851 | ||
852 | lo = NFS_I(ino)->layout; | |
853 | fl = FILELAYOUT_LSEG(lseg); | |
854 | ||
855 | status = filelayout_check_deviceid(lo, fl, gfp_flags); | |
209aa230 AS |
856 | if (status) { |
857 | pnfs_put_lseg(lseg); | |
b1029c9b | 858 | lseg = NULL; |
209aa230 | 859 | } |
8d40b0f1 | 860 | out: |
8d40b0f1 AA |
861 | return lseg; |
862 | } | |
863 | ||
17280175 | 864 | static void |
7c24d948 AA |
865 | filelayout_pg_init_read(struct nfs_pageio_descriptor *pgio, |
866 | struct nfs_page *req) | |
867 | { | |
b3230e80 | 868 | pnfs_generic_pg_check_layout(pgio); |
d600ad1f | 869 | if (!pgio->pg_lseg) { |
8d40b0f1 | 870 | pgio->pg_lseg = fl_pnfs_update_layout(pgio->pg_inode, |
9fcd5960 | 871 | nfs_req_openctx(req), |
8d40b0f1 AA |
872 | 0, |
873 | NFS4_MAX_UINT64, | |
874 | IOMODE_READ, | |
875 | false, | |
876 | GFP_KERNEL); | |
d600ad1f PT |
877 | if (IS_ERR(pgio->pg_lseg)) { |
878 | pgio->pg_error = PTR_ERR(pgio->pg_lseg); | |
879 | pgio->pg_lseg = NULL; | |
880 | return; | |
881 | } | |
882 | } | |
7c24d948 AA |
883 | /* If no lseg, fall back to read through mds */ |
884 | if (pgio->pg_lseg == NULL) | |
1f945357 | 885 | nfs_pageio_reset_read_mds(pgio); |
7c24d948 AA |
886 | } |
887 | ||
17280175 | 888 | static void |
7c24d948 AA |
889 | filelayout_pg_init_write(struct nfs_pageio_descriptor *pgio, |
890 | struct nfs_page *req) | |
891 | { | |
b3230e80 | 892 | pnfs_generic_pg_check_layout(pgio); |
d600ad1f | 893 | if (!pgio->pg_lseg) { |
8d40b0f1 | 894 | pgio->pg_lseg = fl_pnfs_update_layout(pgio->pg_inode, |
9fcd5960 | 895 | nfs_req_openctx(req), |
8d40b0f1 AA |
896 | 0, |
897 | NFS4_MAX_UINT64, | |
898 | IOMODE_RW, | |
899 | false, | |
900 | GFP_NOFS); | |
d600ad1f PT |
901 | if (IS_ERR(pgio->pg_lseg)) { |
902 | pgio->pg_error = PTR_ERR(pgio->pg_lseg); | |
903 | pgio->pg_lseg = NULL; | |
904 | return; | |
905 | } | |
906 | } | |
907 | ||
7c24d948 AA |
908 | /* If no lseg, fall back to write through mds */ |
909 | if (pgio->pg_lseg == NULL) | |
0aa647b7 | 910 | nfs_pageio_reset_write_mds(pgio); |
7c24d948 AA |
911 | } |
912 | ||
1751c363 | 913 | static const struct nfs_pageio_ops filelayout_pg_read_ops = { |
7c24d948 | 914 | .pg_init = filelayout_pg_init_read, |
1751c363 | 915 | .pg_test = filelayout_pg_test, |
493292dd | 916 | .pg_doio = pnfs_generic_pg_readpages, |
180bb5ec | 917 | .pg_cleanup = pnfs_generic_pg_cleanup, |
1751c363 TM |
918 | }; |
919 | ||
920 | static const struct nfs_pageio_ops filelayout_pg_write_ops = { | |
7c24d948 | 921 | .pg_init = filelayout_pg_init_write, |
1751c363 | 922 | .pg_test = filelayout_pg_test, |
dce81290 | 923 | .pg_doio = pnfs_generic_pg_writepages, |
180bb5ec | 924 | .pg_cleanup = pnfs_generic_pg_cleanup, |
1751c363 TM |
925 | }; |
926 | ||
e0c2b380 FI |
927 | static u32 select_bucket_index(struct nfs4_filelayout_segment *fl, u32 j) |
928 | { | |
929 | if (fl->stripe_type == STRIPE_SPARSE) | |
930 | return nfs4_fl_calc_ds_index(&fl->generic_hdr, j); | |
931 | else | |
932 | return j; | |
933 | } | |
934 | ||
c8a3292d PT |
935 | static void |
936 | filelayout_mark_request_commit(struct nfs_page *req, | |
937 | struct pnfs_layout_segment *lseg, | |
b57ff130 WAA |
938 | struct nfs_commit_info *cinfo, |
939 | u32 ds_commit_idx) | |
c8a3292d | 940 | |
e0c2b380 | 941 | { |
e0c2b380 FI |
942 | struct nfs4_filelayout_segment *fl = FILELAYOUT_LSEG(lseg); |
943 | u32 i, j; | |
e0c2b380 | 944 | |
c8a3292d | 945 | if (fl->commit_through_mds) { |
6272dcc6 | 946 | nfs_request_add_commit_list(req, cinfo); |
338d00cf TH |
947 | } else { |
948 | /* Note that we are calling nfs4_fl_calc_j_index on each page | |
949 | * that ends up being committed to a data server. An attractive | |
950 | * alternative is to add a field to nfs_write_data and nfs_page | |
951 | * to store the value calculated in filelayout_write_pagelist | |
952 | * and just use that here. | |
d6d6dc7c | 953 | */ |
338d00cf TH |
954 | j = nfs4_fl_calc_j_index(lseg, req_offset(req)); |
955 | i = select_bucket_index(fl, j); | |
956 | pnfs_layout_mark_request_commit(req, lseg, cinfo, i); | |
e0c2b380 | 957 | } |
8dd37758 TM |
958 | } |
959 | ||
e0c2b380 FI |
960 | static u32 calc_ds_index_from_commit(struct pnfs_layout_segment *lseg, u32 i) |
961 | { | |
962 | struct nfs4_filelayout_segment *flseg = FILELAYOUT_LSEG(lseg); | |
963 | ||
964 | if (flseg->stripe_type == STRIPE_SPARSE) | |
965 | return i; | |
966 | else | |
967 | return nfs4_fl_calc_ds_index(lseg, i); | |
968 | } | |
969 | ||
970 | static struct nfs_fh * | |
971 | select_ds_fh_from_commit(struct pnfs_layout_segment *lseg, u32 i) | |
972 | { | |
973 | struct nfs4_filelayout_segment *flseg = FILELAYOUT_LSEG(lseg); | |
974 | ||
975 | if (flseg->stripe_type == STRIPE_SPARSE) { | |
976 | if (flseg->num_fh == 1) | |
977 | i = 0; | |
978 | else if (flseg->num_fh == 0) | |
979 | /* Use the MDS OPEN fh set in nfs_read_rpcsetup */ | |
980 | return NULL; | |
981 | } | |
982 | return flseg->fh_array[i]; | |
983 | } | |
984 | ||
0b7c0153 | 985 | static int filelayout_initiate_commit(struct nfs_commit_data *data, int how) |
e0c2b380 FI |
986 | { |
987 | struct pnfs_layout_segment *lseg = data->lseg; | |
988 | struct nfs4_pnfs_ds *ds; | |
0e20162e | 989 | struct rpc_clnt *ds_clnt; |
e0c2b380 FI |
990 | u32 idx; |
991 | struct nfs_fh *fh; | |
992 | ||
993 | idx = calc_ds_index_from_commit(lseg, data->ds_commit_index); | |
994 | ds = nfs4_fl_prepare_ds(lseg, idx); | |
0e20162e AA |
995 | if (!ds) |
996 | goto out_err; | |
997 | ||
998 | ds_clnt = nfs4_find_or_create_ds_client(ds->ds_clp, data->inode); | |
999 | if (IS_ERR(ds_clnt)) | |
1000 | goto out_err; | |
1001 | ||
3a7936c3 | 1002 | dprintk("%s ino %lu, how %d cl_count %d\n", __func__, |
212bf41d | 1003 | data->inode->i_ino, how, refcount_read(&ds->ds_clp->cl_count)); |
0b7c0153 | 1004 | data->commit_done_cb = filelayout_commit_done_cb; |
212bf41d | 1005 | refcount_inc(&ds->ds_clp->cl_count); |
e0c2b380 FI |
1006 | data->ds_clp = ds->ds_clp; |
1007 | fh = select_ds_fh_from_commit(lseg, data->ds_commit_index); | |
1008 | if (fh) | |
1009 | data->args.fh = fh; | |
c36aae9a | 1010 | return nfs_initiate_commit(ds_clnt, data, NFS_PROTO(data->inode), |
9f0ec176 AA |
1011 | &filelayout_commit_call_ops, how, |
1012 | RPC_TASK_SOFTCONN); | |
0e20162e | 1013 | out_err: |
f54bcf2e TH |
1014 | pnfs_generic_prepare_to_resend_writes(data); |
1015 | pnfs_generic_commit_release(data); | |
0e20162e | 1016 | return -EAGAIN; |
e0c2b380 FI |
1017 | } |
1018 | ||
e0c2b380 FI |
1019 | static int |
1020 | filelayout_commit_pagelist(struct inode *inode, struct list_head *mds_pages, | |
ea2cf228 | 1021 | int how, struct nfs_commit_info *cinfo) |
e0c2b380 | 1022 | { |
f54bcf2e TH |
1023 | return pnfs_generic_commit_pagelist(inode, mds_pages, how, cinfo, |
1024 | filelayout_initiate_commit); | |
e0c2b380 | 1025 | } |
f54bcf2e | 1026 | |
661373b1 CH |
1027 | static struct nfs4_deviceid_node * |
1028 | filelayout_alloc_deviceid_node(struct nfs_server *server, | |
1029 | struct pnfs_device *pdev, gfp_t gfp_flags) | |
1030 | { | |
1031 | struct nfs4_file_layout_dsaddr *dsaddr; | |
1032 | ||
1033 | dsaddr = nfs4_fl_alloc_deviceid_node(server, pdev, gfp_flags); | |
1034 | if (!dsaddr) | |
1035 | return NULL; | |
1036 | return &dsaddr->id_node; | |
1037 | } | |
e0c2b380 | 1038 | |
1775bc34 | 1039 | static void |
fc87701b | 1040 | filelayout_free_deviceid_node(struct nfs4_deviceid_node *d) |
1775bc34 BH |
1041 | { |
1042 | nfs4_fl_free_deviceid(container_of(d, struct nfs4_file_layout_dsaddr, id_node)); | |
1043 | } | |
1044 | ||
799ba8d5 FI |
1045 | static struct pnfs_layout_hdr * |
1046 | filelayout_alloc_layout_hdr(struct inode *inode, gfp_t gfp_flags) | |
1047 | { | |
1048 | struct nfs4_filelayout *flo; | |
1049 | ||
1050 | flo = kzalloc(sizeof(*flo), gfp_flags); | |
c21e7168 TM |
1051 | if (flo == NULL) |
1052 | return NULL; | |
1053 | pnfs_init_ds_commit_info(&flo->commit_info); | |
9c455a8c | 1054 | flo->commit_info.ops = &filelayout_commit_ops; |
c21e7168 | 1055 | return &flo->generic_hdr; |
799ba8d5 FI |
1056 | } |
1057 | ||
1058 | static void | |
1059 | filelayout_free_layout_hdr(struct pnfs_layout_hdr *lo) | |
1060 | { | |
cf6605d1 | 1061 | kfree_rcu(FILELAYOUT_FROM_HDR(lo), generic_hdr.plh_rcu); |
799ba8d5 FI |
1062 | } |
1063 | ||
ea2cf228 FI |
1064 | static struct pnfs_ds_commit_info * |
1065 | filelayout_get_ds_info(struct inode *inode) | |
1066 | { | |
df011748 FI |
1067 | struct pnfs_layout_hdr *layout = NFS_I(inode)->layout; |
1068 | ||
1069 | if (layout == NULL) | |
1070 | return NULL; | |
1071 | else | |
1072 | return &FILELAYOUT_FROM_HDR(layout)->commit_info; | |
ea2cf228 FI |
1073 | } |
1074 | ||
ba827c9a TM |
1075 | static void |
1076 | filelayout_setup_ds_info(struct pnfs_ds_commit_info *fl_cinfo, | |
1077 | struct pnfs_layout_segment *lseg) | |
1078 | { | |
1079 | struct nfs4_filelayout_segment *fl = FILELAYOUT_LSEG(lseg); | |
1080 | struct inode *inode = lseg->pls_layout->plh_inode; | |
1081 | struct pnfs_commit_array *array, *new; | |
1082 | unsigned int size = (fl->stripe_type == STRIPE_SPARSE) ? | |
1083 | fl->dsaddr->ds_num : fl->dsaddr->stripe_count; | |
1084 | ||
a245832a | 1085 | new = pnfs_alloc_commit_array(size, nfs_io_gfp_mask()); |
ba827c9a TM |
1086 | if (new) { |
1087 | spin_lock(&inode->i_lock); | |
1088 | array = pnfs_add_commit_array(fl_cinfo, new, lseg); | |
1089 | spin_unlock(&inode->i_lock); | |
1090 | if (array != new) | |
1091 | pnfs_free_commit_array(new); | |
1092 | } | |
1093 | } | |
1094 | ||
a9901899 TM |
1095 | static void |
1096 | filelayout_release_ds_info(struct pnfs_ds_commit_info *fl_cinfo, | |
1097 | struct inode *inode) | |
1098 | { | |
1099 | spin_lock(&inode->i_lock); | |
1100 | pnfs_generic_ds_cinfo_destroy(fl_cinfo); | |
1101 | spin_unlock(&inode->i_lock); | |
1102 | } | |
1103 | ||
9c455a8c TM |
1104 | static const struct pnfs_commit_ops filelayout_commit_ops = { |
1105 | .setup_ds_info = filelayout_setup_ds_info, | |
1106 | .release_ds_info = filelayout_release_ds_info, | |
1107 | .mark_request_commit = filelayout_mark_request_commit, | |
1108 | .clear_request_commit = pnfs_generic_clear_request_commit, | |
1109 | .scan_commit_lists = pnfs_generic_scan_commit_lists, | |
1110 | .recover_commit_reqs = pnfs_generic_recover_commit_reqs, | |
1111 | .search_commit_reqs = pnfs_generic_search_commit_reqs, | |
1112 | .commit_pagelist = filelayout_commit_pagelist, | |
1113 | }; | |
a9901899 | 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, | |
a8fd0fee | 1119 | .flags = PNFS_LAYOUTGET_ON_OPEN, |
28ced9a8 | 1120 | .max_layoutget_response = 4096, /* 1 page or so... */ |
799ba8d5 FI |
1121 | .alloc_layout_hdr = filelayout_alloc_layout_hdr, |
1122 | .free_layout_hdr = filelayout_free_layout_hdr, | |
ea8eecdd CH |
1123 | .alloc_lseg = filelayout_alloc_lseg, |
1124 | .free_lseg = filelayout_free_lseg, | |
1751c363 TM |
1125 | .pg_read_ops = &filelayout_pg_read_ops, |
1126 | .pg_write_ops = &filelayout_pg_write_ops, | |
ea2cf228 | 1127 | .get_ds_info = &filelayout_get_ds_info, |
dc70d7b3 | 1128 | .read_pagelist = filelayout_read_pagelist, |
0382b744 | 1129 | .write_pagelist = filelayout_write_pagelist, |
661373b1 | 1130 | .alloc_deviceid_node = filelayout_alloc_deviceid_node, |
fc87701b | 1131 | .free_deviceid_node = filelayout_free_deviceid_node, |
5bb89b47 | 1132 | .sync = pnfs_nfs_generic_sync, |
7ab672ce DH |
1133 | }; |
1134 | ||
1135 | static int __init nfs4filelayout_init(void) | |
1136 | { | |
1137 | printk(KERN_INFO "%s: NFSv4 File Layout Driver Registering...\n", | |
1138 | __func__); | |
1139 | return pnfs_register_layoutdriver(&filelayout_type); | |
1140 | } | |
1141 | ||
1142 | static void __exit nfs4filelayout_exit(void) | |
1143 | { | |
1144 | printk(KERN_INFO "%s: NFSv4 File Layout Driver Unregistering...\n", | |
1145 | __func__); | |
1146 | pnfs_unregister_layoutdriver(&filelayout_type); | |
1147 | } | |
1148 | ||
f85ef69c BF |
1149 | MODULE_ALIAS("nfs-layouttype4-1"); |
1150 | ||
7ab672ce DH |
1151 | module_init(nfs4filelayout_init); |
1152 | module_exit(nfs4filelayout_exit); |