blob: 4ba32e23eddd88dec0a63c8da80aa7f7444ecf00 [file] [log] [blame]
Dean Hildebrand7ab672c2010-10-20 00:18:00 -04001/*
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>
Benny Halevy19345cb2011-06-19 18:33:46 -040033#include <linux/nfs_page.h>
Paul Gortmaker143cb492011-07-01 14:23:34 -040034#include <linux/module.h>
Andy Adamson16b374c2010-10-20 00:18:04 -040035
Weston Andros Adamson0a702192012-02-17 13:15:24 -050036#include <linux/sunrpc/metrics.h>
37
Trond Myklebust76e697b2012-11-26 14:20:49 -050038#include "nfs4session.h"
Andy Adamson16b374c2010-10-20 00:18:04 -040039#include "internal.h"
Andy Adamson9cb81962012-03-07 10:49:41 -050040#include "delegation.h"
Andy Adamson16b374c2010-10-20 00:18:04 -040041#include "nfs4filelayout.h"
Dean Hildebrand7ab672c2010-10-20 00:18:00 -040042
43#define NFSDBG_FACILITY NFSDBG_PNFS_LD
44
45MODULE_LICENSE("GPL");
46MODULE_AUTHOR("Dean Hildebrand <dhildebz@umich.edu>");
47MODULE_DESCRIPTION("The NFSv4 file layout driver");
48
Andy Adamsoncbdabc72011-03-01 01:34:20 +000049#define FILELAYOUT_POLL_RETRY_MAX (15*HZ)
50
Fred Isamancfe7f412011-03-01 01:34:18 +000051static loff_t
52filelayout_get_dense_offset(struct nfs4_filelayout_segment *flseg,
53 loff_t offset)
54{
55 u32 stripe_width = flseg->stripe_unit * flseg->dsaddr->stripe_count;
Chris Metcalf3476f112011-08-11 13:54:28 -070056 u64 stripe_no;
57 u32 rem;
Fred Isamancfe7f412011-03-01 01:34:18 +000058
59 offset -= flseg->pattern_offset;
Chris Metcalf3476f112011-08-11 13:54:28 -070060 stripe_no = div_u64(offset, stripe_width);
61 div_u64_rem(offset, flseg->stripe_unit, &rem);
Fred Isamancfe7f412011-03-01 01:34:18 +000062
Chris Metcalf3476f112011-08-11 13:54:28 -070063 return stripe_no * flseg->stripe_unit + rem;
Fred Isamancfe7f412011-03-01 01:34:18 +000064}
65
66/* This function is used by the layout driver to calculate the
67 * offset of the file on the dserver based on whether the
68 * layout type is STRIPE_DENSE or STRIPE_SPARSE
69 */
70static loff_t
71filelayout_get_dserver_offset(struct pnfs_layout_segment *lseg, loff_t offset)
72{
73 struct nfs4_filelayout_segment *flseg = FILELAYOUT_LSEG(lseg);
74
75 switch (flseg->stripe_type) {
76 case STRIPE_SPARSE:
77 return offset;
78
79 case STRIPE_DENSE:
80 return filelayout_get_dense_offset(flseg, offset);
81 }
82
83 BUG();
84}
85
Andy Adamsone7dd79af2012-04-27 17:53:46 -040086static void filelayout_reset_write(struct nfs_write_data *data)
87{
88 struct nfs_pgio_header *hdr = data->header;
Andy Adamsone7dd79af2012-04-27 17:53:46 -040089 struct rpc_task *task = &data->task;
90
91 if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) {
92 dprintk("%s Reset task %5u for i/o through MDS "
93 "(req %s/%lld, %u bytes @ offset %llu)\n", __func__,
94 data->task.tk_pid,
Bryan Schumaker497826a2012-05-22 10:10:03 -040095 hdr->inode->i_sb->s_id,
96 (long long)NFS_FILEID(hdr->inode),
Andy Adamsone7dd79af2012-04-27 17:53:46 -040097 data->args.count,
98 (unsigned long long)data->args.offset);
99
100 task->tk_status = pnfs_write_done_resend_to_mds(hdr->inode,
101 &hdr->pages,
Benny Halevy78f33272013-02-24 09:55:57 -0500102 hdr->completion_ops,
103 hdr->dreq);
Andy Adamsone7dd79af2012-04-27 17:53:46 -0400104 }
105}
106
107static void filelayout_reset_read(struct nfs_read_data *data)
108{
109 struct nfs_pgio_header *hdr = data->header;
Andy Adamsone7dd79af2012-04-27 17:53:46 -0400110 struct rpc_task *task = &data->task;
111
112 if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) {
113 dprintk("%s Reset task %5u for i/o through MDS "
114 "(req %s/%lld, %u bytes @ offset %llu)\n", __func__,
115 data->task.tk_pid,
Bryan Schumaker497826a2012-05-22 10:10:03 -0400116 hdr->inode->i_sb->s_id,
117 (long long)NFS_FILEID(hdr->inode),
Andy Adamsone7dd79af2012-04-27 17:53:46 -0400118 data->args.count,
119 (unsigned long long)data->args.offset);
120
121 task->tk_status = pnfs_read_done_resend_to_mds(hdr->inode,
122 &hdr->pages,
Benny Halevy78f33272013-02-24 09:55:57 -0500123 hdr->completion_ops,
124 hdr->dreq);
Andy Adamsone7dd79af2012-04-27 17:53:46 -0400125 }
126}
127
Trond Myklebustd527e5c2012-10-11 13:43:38 -0400128static void filelayout_fenceme(struct inode *inode, struct pnfs_layout_hdr *lo)
129{
130 if (!test_and_clear_bit(NFS_LAYOUT_RETURN, &lo->plh_flags))
131 return;
Trond Myklebustd527e5c2012-10-11 13:43:38 -0400132 pnfs_return_layout(inode);
133}
134
Andy Adamsoncbdabc72011-03-01 01:34:20 +0000135static int filelayout_async_handle_error(struct rpc_task *task,
136 struct nfs4_state *state,
137 struct nfs_client *clp,
Andy Adamsone7dd79af2012-04-27 17:53:46 -0400138 struct pnfs_layout_segment *lseg)
Andy Adamsoncbdabc72011-03-01 01:34:20 +0000139{
Trond Myklebustd527e5c2012-10-11 13:43:38 -0400140 struct pnfs_layout_hdr *lo = lseg->pls_layout;
141 struct inode *inode = lo->plh_inode;
Andy Adamsone7dd79af2012-04-27 17:53:46 -0400142 struct nfs_server *mds_server = NFS_SERVER(inode);
143 struct nfs4_deviceid_node *devid = FILELAYOUT_DEVID_NODE(lseg);
Andy Adamson9cb81962012-03-07 10:49:41 -0500144 struct nfs_client *mds_client = mds_server->nfs_client;
Andy Adamson671fb892012-04-27 17:53:49 -0400145 struct nfs4_slot_table *tbl = &clp->cl_session->fc_slot_table;
Andy Adamson9cb81962012-03-07 10:49:41 -0500146
Andy Adamsoncbdabc72011-03-01 01:34:20 +0000147 if (task->tk_status >= 0)
148 return 0;
Andy Adamsoncbdabc72011-03-01 01:34:20 +0000149
150 switch (task->tk_status) {
Andy Adamson9cb81962012-03-07 10:49:41 -0500151 /* MDS state errors */
152 case -NFS4ERR_DELEG_REVOKED:
153 case -NFS4ERR_ADMIN_REVOKED:
154 case -NFS4ERR_BAD_STATEID:
Andy Adamsone7dd79af2012-04-27 17:53:46 -0400155 if (state == NULL)
156 break;
Andy Adamson2dc31752012-03-08 11:03:53 -0500157 nfs_remove_bad_delegation(state->inode);
Andy Adamson9cb81962012-03-07 10:49:41 -0500158 case -NFS4ERR_OPENMODE:
Andy Adamsone7dd79af2012-04-27 17:53:46 -0400159 if (state == NULL)
160 break;
Trond Myklebust5d422302013-03-14 16:57:48 -0400161 if (nfs4_schedule_stateid_recovery(mds_server, state) < 0)
162 goto out_bad_stateid;
Andy Adamson9cb81962012-03-07 10:49:41 -0500163 goto wait_on_recovery;
164 case -NFS4ERR_EXPIRED:
Trond Myklebust5d422302013-03-14 16:57:48 -0400165 if (state != NULL) {
166 if (nfs4_schedule_stateid_recovery(mds_server, state) < 0)
167 goto out_bad_stateid;
168 }
Andy Adamson9cb81962012-03-07 10:49:41 -0500169 nfs4_schedule_lease_recovery(mds_client);
170 goto wait_on_recovery;
171 /* DS session errors */
Andy Adamsoncbdabc72011-03-01 01:34:20 +0000172 case -NFS4ERR_BADSESSION:
173 case -NFS4ERR_BADSLOT:
174 case -NFS4ERR_BAD_HIGH_SLOT:
175 case -NFS4ERR_DEADSESSION:
176 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
177 case -NFS4ERR_SEQ_FALSE_RETRY:
178 case -NFS4ERR_SEQ_MISORDERED:
179 dprintk("%s ERROR %d, Reset session. Exchangeid "
180 "flags 0x%x\n", __func__, task->tk_status,
181 clp->cl_exchange_flags);
Trond Myklebust9f594792012-05-27 13:02:53 -0400182 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
Andy Adamsoncbdabc72011-03-01 01:34:20 +0000183 break;
184 case -NFS4ERR_DELAY:
185 case -NFS4ERR_GRACE:
Andy Adamsoncbdabc72011-03-01 01:34:20 +0000186 rpc_delay(task, FILELAYOUT_POLL_RETRY_MAX);
187 break;
Andy Adamsona8a4ae32011-05-03 13:43:03 -0400188 case -NFS4ERR_RETRY_UNCACHED_REP:
189 break;
Andy Adamson041245c2012-04-27 17:53:53 -0400190 /* Invalidate Layout errors */
191 case -NFS4ERR_PNFS_NO_LAYOUT:
192 case -ESTALE: /* mapped NFS4ERR_STALE */
193 case -EBADHANDLE: /* mapped NFS4ERR_BADHANDLE */
194 case -EISDIR: /* mapped NFS4ERR_ISDIR */
195 case -NFS4ERR_FHEXPIRED:
196 case -NFS4ERR_WRONG_TYPE:
197 dprintk("%s Invalid layout error %d\n", __func__,
198 task->tk_status);
199 /*
200 * Destroy layout so new i/o will get a new layout.
201 * Layout will not be destroyed until all current lseg
202 * references are put. Mark layout as invalid to resend failed
203 * i/o and all i/o waiting on the slot table to the MDS until
204 * layout is destroyed and a new valid layout is obtained.
205 */
Andy Adamsond42e7872012-05-22 08:09:28 -0400206 pnfs_destroy_layout(NFS_I(inode));
Andy Adamson041245c2012-04-27 17:53:53 -0400207 rpc_wake_up(&tbl->slot_tbl_waitq);
208 goto reset;
Andy Adamsone7dd79af2012-04-27 17:53:46 -0400209 /* RPC connection errors */
210 case -ECONNREFUSED:
211 case -EHOSTDOWN:
212 case -EHOSTUNREACH:
213 case -ENETUNREACH:
214 case -EIO:
215 case -ETIMEDOUT:
216 case -EPIPE:
217 dprintk("%s DS connection error %d\n", __func__,
Andy Adamsoncbdabc72011-03-01 01:34:20 +0000218 task->tk_status);
Trond Myklebust1dfed272012-09-18 19:51:12 -0400219 nfs4_mark_deviceid_unavailable(devid);
Trond Myklebustd527e5c2012-10-11 13:43:38 -0400220 set_bit(NFS_LAYOUT_RETURN, &lo->plh_flags);
Andy Adamson671fb892012-04-27 17:53:49 -0400221 rpc_wake_up(&tbl->slot_tbl_waitq);
Andy Adamsone7dd79af2012-04-27 17:53:46 -0400222 /* fall through */
223 default:
Andy Adamson041245c2012-04-27 17:53:53 -0400224reset:
Andy Adamsone7dd79af2012-04-27 17:53:46 -0400225 dprintk("%s Retry through MDS. Error %d\n", __func__,
226 task->tk_status);
227 return -NFS4ERR_RESET_TO_MDS;
Andy Adamsoncbdabc72011-03-01 01:34:20 +0000228 }
Andy Adamson9cb81962012-03-07 10:49:41 -0500229out:
Andy Adamsoncbdabc72011-03-01 01:34:20 +0000230 task->tk_status = 0;
231 return -EAGAIN;
Trond Myklebust5d422302013-03-14 16:57:48 -0400232out_bad_stateid:
233 task->tk_status = -EIO;
234 return 0;
Andy Adamson9cb81962012-03-07 10:49:41 -0500235wait_on_recovery:
236 rpc_sleep_on(&mds_client->cl_rpcwaitq, task, NULL);
237 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &mds_client->cl_state) == 0)
238 rpc_wake_up_queued_task(&mds_client->cl_rpcwaitq, task);
239 goto out;
Andy Adamsoncbdabc72011-03-01 01:34:20 +0000240}
241
242/* NFS_PROTO call done callback routines */
243
244static int filelayout_read_done_cb(struct rpc_task *task,
245 struct nfs_read_data *data)
246{
Andy Adamsone7dd79af2012-04-27 17:53:46 -0400247 struct nfs_pgio_header *hdr = data->header;
248 int err;
Andy Adamsoncbdabc72011-03-01 01:34:20 +0000249
Andy Adamsone7dd79af2012-04-27 17:53:46 -0400250 err = filelayout_async_handle_error(task, data->args.context->state,
251 data->ds_clp, hdr->lseg);
Andy Adamsoncbdabc72011-03-01 01:34:20 +0000252
Andy Adamsone7dd79af2012-04-27 17:53:46 -0400253 switch (err) {
254 case -NFS4ERR_RESET_TO_MDS:
255 filelayout_reset_read(data);
256 return task->tk_status;
257 case -EAGAIN:
Trond Myklebustd00c5d42011-10-19 12:17:29 -0700258 rpc_restart_call_prepare(task);
Andy Adamsoncbdabc72011-03-01 01:34:20 +0000259 return -EAGAIN;
260 }
261
262 return 0;
263}
264
Andy Adamson16b374c2010-10-20 00:18:04 -0400265/*
Andy Adamson863a3c62011-03-23 13:27:54 +0000266 * We reference the rpc_cred of the first WRITE that triggers the need for
267 * a LAYOUTCOMMIT, and use it to send the layoutcommit compound.
268 * rfc5661 is not clear about which credential should be used.
269 */
270static void
271filelayout_set_layoutcommit(struct nfs_write_data *wdata)
272{
Fred Isamancd841602012-04-20 14:47:44 -0400273 struct nfs_pgio_header *hdr = wdata->header;
274
275 if (FILELAYOUT_LSEG(hdr->lseg)->commit_through_mds ||
Andy Adamson863a3c62011-03-23 13:27:54 +0000276 wdata->res.verf->committed == NFS_FILE_SYNC)
277 return;
278
279 pnfs_set_layoutcommit(wdata);
Fred Isamancd841602012-04-20 14:47:44 -0400280 dprintk("%s ionde %lu pls_end_pos %lu\n", __func__, hdr->inode->i_ino,
281 (unsigned long) NFS_I(hdr->inode)->layout->plh_lwb);
Andy Adamson863a3c62011-03-23 13:27:54 +0000282}
283
Trond Myklebust1dfed272012-09-18 19:51:12 -0400284bool
285filelayout_test_devid_unavailable(struct nfs4_deviceid_node *node)
286{
287 return filelayout_test_devid_invalid(node) ||
288 nfs4_test_deviceid_unavailable(node);
289}
290
291static bool
292filelayout_reset_to_mds(struct pnfs_layout_segment *lseg)
293{
294 struct nfs4_deviceid_node *node = FILELAYOUT_DEVID_NODE(lseg);
295
Trond Myklebust8006bfb2012-09-21 14:48:04 -0400296 return filelayout_test_devid_unavailable(node);
Trond Myklebust1dfed272012-09-18 19:51:12 -0400297}
298
Andy Adamson863a3c62011-03-23 13:27:54 +0000299/*
Andy Adamsondc70d7b2011-03-01 01:34:19 +0000300 * Call ops for the async read/write cases
301 * In the case of dense layouts, the offset needs to be reset to its
302 * original value.
303 */
304static void filelayout_read_prepare(struct rpc_task *task, void *data)
305{
Fred Isamancd12ae32012-04-20 14:47:42 -0400306 struct nfs_read_data *rdata = data;
Andy Adamsondc70d7b2011-03-01 01:34:19 +0000307
Trond Myklebustc58c8442013-03-18 19:45:14 -0400308 if (unlikely(test_bit(NFS_CONTEXT_BAD, &rdata->args.context->flags))) {
309 rpc_exit(task, -EIO);
310 return;
311 }
Andy Adamson041245c2012-04-27 17:53:53 -0400312 if (filelayout_reset_to_mds(rdata->header->lseg)) {
Andy Adamson0ad2f372012-04-27 17:53:48 -0400313 dprintk("%s task %u reset io to MDS\n", __func__, task->tk_pid);
314 filelayout_reset_read(rdata);
315 rpc_exit(task, 0);
316 return;
317 }
Andy Adamsoncbdabc72011-03-01 01:34:20 +0000318 rdata->read_done_cb = filelayout_read_done_cb;
319
Trond Myklebustd9afbd12012-10-22 20:28:44 -0400320 nfs41_setup_sequence(rdata->ds_clp->cl_session,
321 &rdata->args.seq_args,
322 &rdata->res.seq_res,
323 task);
Andy Adamsondc70d7b2011-03-01 01:34:19 +0000324}
325
326static void filelayout_read_call_done(struct rpc_task *task, void *data)
327{
Fred Isamancd12ae32012-04-20 14:47:42 -0400328 struct nfs_read_data *rdata = data;
Andy Adamsondc70d7b2011-03-01 01:34:19 +0000329
330 dprintk("--> %s task->tk_status %d\n", __func__, task->tk_status);
331
Andy Adamsonbd4aeff2012-05-22 08:09:27 -0400332 if (test_bit(NFS_IOHDR_REDO, &rdata->header->flags) &&
333 task->tk_status == 0)
Andy Adamson0ad2f372012-04-27 17:53:48 -0400334 return;
335
Andy Adamsondc70d7b2011-03-01 01:34:19 +0000336 /* Note this may cause RPC to be resent */
Fred Isamancd841602012-04-20 14:47:44 -0400337 rdata->header->mds_ops->rpc_call_done(task, data);
Andy Adamsondc70d7b2011-03-01 01:34:19 +0000338}
339
Weston Andros Adamson0a702192012-02-17 13:15:24 -0500340static void filelayout_read_count_stats(struct rpc_task *task, void *data)
341{
Fred Isamancd12ae32012-04-20 14:47:42 -0400342 struct nfs_read_data *rdata = data;
Weston Andros Adamson0a702192012-02-17 13:15:24 -0500343
Fred Isamancd841602012-04-20 14:47:44 -0400344 rpc_count_iostats(task, NFS_SERVER(rdata->header->inode)->client->cl_metrics);
Weston Andros Adamson0a702192012-02-17 13:15:24 -0500345}
346
Andy Adamsondc70d7b2011-03-01 01:34:19 +0000347static void filelayout_read_release(void *data)
348{
Fred Isamancd12ae32012-04-20 14:47:42 -0400349 struct nfs_read_data *rdata = data;
Trond Myklebustd527e5c2012-10-11 13:43:38 -0400350 struct pnfs_layout_hdr *lo = rdata->header->lseg->pls_layout;
Andy Adamsondc70d7b2011-03-01 01:34:19 +0000351
Trond Myklebustd527e5c2012-10-11 13:43:38 -0400352 filelayout_fenceme(lo->plh_inode, lo);
Andy Adamson996074c2012-05-22 08:09:26 -0400353 nfs_put_client(rdata->ds_clp);
Fred Isamancd841602012-04-20 14:47:44 -0400354 rdata->header->mds_ops->rpc_release(data);
Andy Adamsondc70d7b2011-03-01 01:34:19 +0000355}
356
Fred Isamana69aef12011-03-03 15:13:47 +0000357static int filelayout_write_done_cb(struct rpc_task *task,
358 struct nfs_write_data *data)
359{
Andy Adamsone7dd79af2012-04-27 17:53:46 -0400360 struct nfs_pgio_header *hdr = data->header;
361 int err;
Fred Isamana69aef12011-03-03 15:13:47 +0000362
Andy Adamsone7dd79af2012-04-27 17:53:46 -0400363 err = filelayout_async_handle_error(task, data->args.context->state,
364 data->ds_clp, hdr->lseg);
365
366 switch (err) {
367 case -NFS4ERR_RESET_TO_MDS:
368 filelayout_reset_write(data);
369 return task->tk_status;
370 case -EAGAIN:
Trond Myklebustd00c5d42011-10-19 12:17:29 -0700371 rpc_restart_call_prepare(task);
Fred Isamana69aef12011-03-03 15:13:47 +0000372 return -EAGAIN;
373 }
374
Andy Adamson863a3c62011-03-23 13:27:54 +0000375 filelayout_set_layoutcommit(data);
Fred Isamana69aef12011-03-03 15:13:47 +0000376 return 0;
377}
378
Fred Isamane0c2b382011-03-23 13:27:53 +0000379/* Fake up some data that will cause nfs_commit_release to retry the writes. */
Fred Isaman0b7c0152012-04-20 14:47:39 -0400380static void prepare_to_resend_writes(struct nfs_commit_data *data)
Fred Isamane0c2b382011-03-23 13:27:53 +0000381{
382 struct nfs_page *first = nfs_list_entry(data->pages.next);
383
384 data->task.tk_status = 0;
Trond Myklebust2f2c63b2012-06-08 11:56:09 -0400385 memcpy(&data->verf.verifier, &first->wb_verf,
386 sizeof(data->verf.verifier));
387 data->verf.verifier.data[0]++; /* ensure verifier mismatch */
Fred Isamane0c2b382011-03-23 13:27:53 +0000388}
389
390static int filelayout_commit_done_cb(struct rpc_task *task,
Fred Isaman0b7c0152012-04-20 14:47:39 -0400391 struct nfs_commit_data *data)
Fred Isamane0c2b382011-03-23 13:27:53 +0000392{
Andy Adamsone7dd79af2012-04-27 17:53:46 -0400393 int err;
Fred Isamane0c2b382011-03-23 13:27:53 +0000394
Andy Adamsone7dd79af2012-04-27 17:53:46 -0400395 err = filelayout_async_handle_error(task, NULL, data->ds_clp,
396 data->lseg);
397
398 switch (err) {
399 case -NFS4ERR_RESET_TO_MDS:
400 prepare_to_resend_writes(data);
401 return -EAGAIN;
402 case -EAGAIN:
403 rpc_restart_call_prepare(task);
Fred Isamane0c2b382011-03-23 13:27:53 +0000404 return -EAGAIN;
405 }
406
407 return 0;
408}
409
Fred Isamana69aef12011-03-03 15:13:47 +0000410static void filelayout_write_prepare(struct rpc_task *task, void *data)
411{
Fred Isamancd12ae32012-04-20 14:47:42 -0400412 struct nfs_write_data *wdata = data;
Fred Isamana69aef12011-03-03 15:13:47 +0000413
Trond Myklebustc58c8442013-03-18 19:45:14 -0400414 if (unlikely(test_bit(NFS_CONTEXT_BAD, &wdata->args.context->flags))) {
415 rpc_exit(task, -EIO);
416 return;
417 }
Andy Adamson041245c2012-04-27 17:53:53 -0400418 if (filelayout_reset_to_mds(wdata->header->lseg)) {
Andy Adamson0ad2f372012-04-27 17:53:48 -0400419 dprintk("%s task %u reset io to MDS\n", __func__, task->tk_pid);
420 filelayout_reset_write(wdata);
421 rpc_exit(task, 0);
422 return;
423 }
Trond Myklebustd9afbd12012-10-22 20:28:44 -0400424 nfs41_setup_sequence(wdata->ds_clp->cl_session,
425 &wdata->args.seq_args,
426 &wdata->res.seq_res,
427 task);
Fred Isamana69aef12011-03-03 15:13:47 +0000428}
429
430static void filelayout_write_call_done(struct rpc_task *task, void *data)
431{
Fred Isamancd12ae32012-04-20 14:47:42 -0400432 struct nfs_write_data *wdata = data;
Fred Isamana69aef12011-03-03 15:13:47 +0000433
Andy Adamsonbd4aeff2012-05-22 08:09:27 -0400434 if (test_bit(NFS_IOHDR_REDO, &wdata->header->flags) &&
435 task->tk_status == 0)
Andy Adamson0ad2f372012-04-27 17:53:48 -0400436 return;
437
Fred Isamana69aef12011-03-03 15:13:47 +0000438 /* Note this may cause RPC to be resent */
Fred Isamancd841602012-04-20 14:47:44 -0400439 wdata->header->mds_ops->rpc_call_done(task, data);
Fred Isamana69aef12011-03-03 15:13:47 +0000440}
441
Weston Andros Adamson0a702192012-02-17 13:15:24 -0500442static void filelayout_write_count_stats(struct rpc_task *task, void *data)
443{
Fred Isamancd12ae32012-04-20 14:47:42 -0400444 struct nfs_write_data *wdata = data;
Weston Andros Adamson0a702192012-02-17 13:15:24 -0500445
Fred Isamancd841602012-04-20 14:47:44 -0400446 rpc_count_iostats(task, NFS_SERVER(wdata->header->inode)->client->cl_metrics);
Weston Andros Adamson0a702192012-02-17 13:15:24 -0500447}
448
Fred Isamana69aef12011-03-03 15:13:47 +0000449static void filelayout_write_release(void *data)
450{
Fred Isamancd12ae32012-04-20 14:47:42 -0400451 struct nfs_write_data *wdata = data;
Trond Myklebustd527e5c2012-10-11 13:43:38 -0400452 struct pnfs_layout_hdr *lo = wdata->header->lseg->pls_layout;
Fred Isamana69aef12011-03-03 15:13:47 +0000453
Trond Myklebustd527e5c2012-10-11 13:43:38 -0400454 filelayout_fenceme(lo->plh_inode, lo);
Andy Adamson996074c2012-05-22 08:09:26 -0400455 nfs_put_client(wdata->ds_clp);
Fred Isamancd841602012-04-20 14:47:44 -0400456 wdata->header->mds_ops->rpc_release(data);
Fred Isamana69aef12011-03-03 15:13:47 +0000457}
458
Fred Isaman0b7c0152012-04-20 14:47:39 -0400459static void filelayout_commit_prepare(struct rpc_task *task, void *data)
Fred Isamane0c2b382011-03-23 13:27:53 +0000460{
Fred Isaman0b7c0152012-04-20 14:47:39 -0400461 struct nfs_commit_data *wdata = data;
Fred Isamane0c2b382011-03-23 13:27:53 +0000462
Trond Myklebustd9afbd12012-10-22 20:28:44 -0400463 nfs41_setup_sequence(wdata->ds_clp->cl_session,
464 &wdata->args.seq_args,
465 &wdata->res.seq_res,
466 task);
Fred Isaman0b7c0152012-04-20 14:47:39 -0400467}
468
469static void filelayout_write_commit_done(struct rpc_task *task, void *data)
470{
471 struct nfs_commit_data *wdata = data;
472
473 /* Note this may cause RPC to be resent */
474 wdata->mds_ops->rpc_call_done(task, data);
475}
476
477static void filelayout_commit_count_stats(struct rpc_task *task, void *data)
478{
479 struct nfs_commit_data *cdata = data;
480
481 rpc_count_iostats(task, NFS_SERVER(cdata->inode)->client->cl_metrics);
482}
483
484static void filelayout_commit_release(void *calldata)
485{
486 struct nfs_commit_data *data = calldata;
487
Fred Isamanf453a542012-04-20 14:47:54 -0400488 data->completion_ops->completion(data);
Trond Myklebust9369a432012-09-18 20:57:08 -0400489 pnfs_put_lseg(data->lseg);
Andy Adamson3a7936c2012-04-27 17:53:51 -0400490 nfs_put_client(data->ds_clp);
Fred Isaman0b7c0152012-04-20 14:47:39 -0400491 nfs_commitdata_release(data);
Fred Isamane0c2b382011-03-23 13:27:53 +0000492}
493
Trond Myklebust17280172012-03-11 13:11:00 -0400494static const struct rpc_call_ops filelayout_read_call_ops = {
Andy Adamsondc70d7b2011-03-01 01:34:19 +0000495 .rpc_call_prepare = filelayout_read_prepare,
496 .rpc_call_done = filelayout_read_call_done,
Weston Andros Adamson0a702192012-02-17 13:15:24 -0500497 .rpc_count_stats = filelayout_read_count_stats,
Andy Adamsondc70d7b2011-03-01 01:34:19 +0000498 .rpc_release = filelayout_read_release,
499};
500
Trond Myklebust17280172012-03-11 13:11:00 -0400501static const struct rpc_call_ops filelayout_write_call_ops = {
Fred Isamana69aef12011-03-03 15:13:47 +0000502 .rpc_call_prepare = filelayout_write_prepare,
503 .rpc_call_done = filelayout_write_call_done,
Weston Andros Adamson0a702192012-02-17 13:15:24 -0500504 .rpc_count_stats = filelayout_write_count_stats,
Fred Isamana69aef12011-03-03 15:13:47 +0000505 .rpc_release = filelayout_write_release,
506};
507
Trond Myklebust17280172012-03-11 13:11:00 -0400508static const struct rpc_call_ops filelayout_commit_call_ops = {
Fred Isaman0b7c0152012-04-20 14:47:39 -0400509 .rpc_call_prepare = filelayout_commit_prepare,
510 .rpc_call_done = filelayout_write_commit_done,
511 .rpc_count_stats = filelayout_commit_count_stats,
Fred Isamane0c2b382011-03-23 13:27:53 +0000512 .rpc_release = filelayout_commit_release,
513};
514
Andy Adamsondc70d7b2011-03-01 01:34:19 +0000515static enum pnfs_try_status
516filelayout_read_pagelist(struct nfs_read_data *data)
517{
Fred Isamancd841602012-04-20 14:47:44 -0400518 struct nfs_pgio_header *hdr = data->header;
519 struct pnfs_layout_segment *lseg = hdr->lseg;
Andy Adamsondc70d7b2011-03-01 01:34:19 +0000520 struct nfs4_pnfs_ds *ds;
521 loff_t offset = data->args.offset;
522 u32 j, idx;
523 struct nfs_fh *fh;
Andy Adamsondc70d7b2011-03-01 01:34:19 +0000524
525 dprintk("--> %s ino %lu pgbase %u req %Zu@%llu\n",
Fred Isamancd841602012-04-20 14:47:44 -0400526 __func__, hdr->inode->i_ino,
Andy Adamsondc70d7b2011-03-01 01:34:19 +0000527 data->args.pgbase, (size_t)data->args.count, offset);
528
529 /* Retrieve the correct rpc_client for the byte range */
530 j = nfs4_fl_calc_j_index(lseg, offset);
531 idx = nfs4_fl_calc_ds_index(lseg, j);
532 ds = nfs4_fl_prepare_ds(lseg, idx);
Andy Adamson90fecfc2012-04-27 17:53:43 -0400533 if (!ds)
Andy Adamsondc70d7b2011-03-01 01:34:19 +0000534 return PNFS_NOT_ATTEMPTED;
Andy Adamson3a7936c2012-04-27 17:53:51 -0400535 dprintk("%s USE DS: %s cl_count %d\n", __func__,
536 ds->ds_remotestr, atomic_read(&ds->ds_clp->cl_count));
Andy Adamsondc70d7b2011-03-01 01:34:19 +0000537
538 /* No multipath support. Use first DS */
Andy Adamson3a7936c2012-04-27 17:53:51 -0400539 atomic_inc(&ds->ds_clp->cl_count);
Andy Adamsondc70d7b2011-03-01 01:34:19 +0000540 data->ds_clp = ds->ds_clp;
541 fh = nfs4_fl_select_ds_fh(lseg, j);
542 if (fh)
543 data->args.fh = fh;
544
545 data->args.offset = filelayout_get_dserver_offset(lseg, offset);
546 data->mds_offset = offset;
547
548 /* Perform an asynchronous read to ds */
Trond Myklebustbc5a89b2012-10-15 14:58:04 -0400549 nfs_initiate_read(ds->ds_clp->cl_rpcclient, data,
Andy Adamson9f0ec1762012-04-27 17:53:44 -0400550 &filelayout_read_call_ops, RPC_TASK_SOFTCONN);
Andy Adamsondc70d7b2011-03-01 01:34:19 +0000551 return PNFS_ATTEMPTED;
552}
553
Fred Isamana69aef12011-03-03 15:13:47 +0000554/* Perform async writes. */
Andy Adamson0382b742011-03-03 15:13:45 +0000555static enum pnfs_try_status
556filelayout_write_pagelist(struct nfs_write_data *data, int sync)
557{
Fred Isamancd841602012-04-20 14:47:44 -0400558 struct nfs_pgio_header *hdr = data->header;
559 struct pnfs_layout_segment *lseg = hdr->lseg;
Fred Isamana69aef12011-03-03 15:13:47 +0000560 struct nfs4_pnfs_ds *ds;
561 loff_t offset = data->args.offset;
562 u32 j, idx;
563 struct nfs_fh *fh;
Fred Isamana69aef12011-03-03 15:13:47 +0000564
565 /* Retrieve the correct rpc_client for the byte range */
566 j = nfs4_fl_calc_j_index(lseg, offset);
567 idx = nfs4_fl_calc_ds_index(lseg, j);
568 ds = nfs4_fl_prepare_ds(lseg, idx);
Andy Adamson90fecfc2012-04-27 17:53:43 -0400569 if (!ds)
Fred Isamana69aef12011-03-03 15:13:47 +0000570 return PNFS_NOT_ATTEMPTED;
Andy Adamson3a7936c2012-04-27 17:53:51 -0400571 dprintk("%s ino %lu sync %d req %Zu@%llu DS: %s cl_count %d\n",
572 __func__, hdr->inode->i_ino, sync, (size_t) data->args.count,
573 offset, ds->ds_remotestr, atomic_read(&ds->ds_clp->cl_count));
Fred Isamana69aef12011-03-03 15:13:47 +0000574
Fred Isamana69aef12011-03-03 15:13:47 +0000575 data->write_done_cb = filelayout_write_done_cb;
Andy Adamson3a7936c2012-04-27 17:53:51 -0400576 atomic_inc(&ds->ds_clp->cl_count);
Fred Isamana69aef12011-03-03 15:13:47 +0000577 data->ds_clp = ds->ds_clp;
578 fh = nfs4_fl_select_ds_fh(lseg, j);
579 if (fh)
580 data->args.fh = fh;
581 /*
582 * Get the file offset on the dserver. Set the write offset to
583 * this offset and save the original offset.
584 */
585 data->args.offset = filelayout_get_dserver_offset(lseg, offset);
Fred Isamana69aef12011-03-03 15:13:47 +0000586
587 /* Perform an asynchronous write */
Trond Myklebustbc5a89b2012-10-15 14:58:04 -0400588 nfs_initiate_write(ds->ds_clp->cl_rpcclient, data,
Andy Adamson9f0ec1762012-04-27 17:53:44 -0400589 &filelayout_write_call_ops, sync,
590 RPC_TASK_SOFTCONN);
Fred Isamana69aef12011-03-03 15:13:47 +0000591 return PNFS_ATTEMPTED;
Andy Adamson0382b742011-03-03 15:13:45 +0000592}
593
Andy Adamsondc70d7b2011-03-01 01:34:19 +0000594/*
Andy Adamson16b374c2010-10-20 00:18:04 -0400595 * filelayout_check_layout()
596 *
597 * Make sure layout segment parameters are sane WRT the device.
598 * At this point no generic layer initialization of the lseg has occurred,
599 * and nothing has been added to the layout_hdr cache.
600 *
601 */
602static int
603filelayout_check_layout(struct pnfs_layout_hdr *lo,
604 struct nfs4_filelayout_segment *fl,
605 struct nfs4_layoutget_res *lgr,
Trond Myklebusta75b9df2011-05-11 18:00:51 -0400606 struct nfs4_deviceid *id,
607 gfp_t gfp_flags)
Andy Adamson16b374c2010-10-20 00:18:04 -0400608{
Benny Halevya1eaecb2011-05-19 22:14:47 -0400609 struct nfs4_deviceid_node *d;
Andy Adamson16b374c2010-10-20 00:18:04 -0400610 struct nfs4_file_layout_dsaddr *dsaddr;
611 int status = -EINVAL;
Fred Isamanb7edfaa2011-01-06 11:36:21 +0000612 struct nfs_server *nfss = NFS_SERVER(lo->plh_inode);
Andy Adamson16b374c2010-10-20 00:18:04 -0400613
614 dprintk("--> %s\n", __func__);
615
Andy Adamson7c24d942011-06-13 18:22:38 -0400616 /* FIXME: remove this check when layout segment support is added */
617 if (lgr->range.offset != 0 ||
618 lgr->range.length != NFS4_MAX_UINT64) {
619 dprintk("%s Only whole file layouts supported. Use MDS i/o\n",
620 __func__);
621 goto out;
622 }
623
Andy Adamson16b374c2010-10-20 00:18:04 -0400624 if (fl->pattern_offset > lgr->range.offset) {
Jim Rees3b6445a2011-02-22 19:31:57 -0500625 dprintk("%s pattern_offset %lld too large\n",
Andy Adamson16b374c2010-10-20 00:18:04 -0400626 __func__, fl->pattern_offset);
627 goto out;
628 }
629
Benny Halevy75247af2011-02-22 15:56:01 -0800630 if (!fl->stripe_unit || fl->stripe_unit % PAGE_SIZE) {
631 dprintk("%s Invalid stripe unit (%u)\n",
Andy Adamson16b374c2010-10-20 00:18:04 -0400632 __func__, fl->stripe_unit);
633 goto out;
634 }
635
636 /* find and reference the deviceid */
Benny Halevy35c8bb52011-05-24 18:04:02 +0300637 d = nfs4_find_get_deviceid(NFS_SERVER(lo->plh_inode)->pnfs_curr_ld,
638 NFS_SERVER(lo->plh_inode)->nfs_client, id);
Benny Halevya1eaecb2011-05-19 22:14:47 -0400639 if (d == NULL) {
Trond Myklebust78e4e052012-09-18 21:02:29 -0400640 dsaddr = filelayout_get_device_info(lo->plh_inode, id, gfp_flags);
Andy Adamson16b374c2010-10-20 00:18:04 -0400641 if (dsaddr == NULL)
642 goto out;
Benny Halevya1eaecb2011-05-19 22:14:47 -0400643 } else
644 dsaddr = container_of(d, struct nfs4_file_layout_dsaddr, id_node);
Trond Myklebust1dfed272012-09-18 19:51:12 -0400645 /* Found deviceid is unavailable */
646 if (filelayout_test_devid_unavailable(&dsaddr->id_node))
Andy Adamsonc47abcf2011-06-15 17:52:40 -0400647 goto out_put;
648
Andy Adamson16b374c2010-10-20 00:18:04 -0400649 fl->dsaddr = dsaddr;
650
Chuck Levere4149662011-10-25 12:18:03 -0400651 if (fl->first_stripe_index >= dsaddr->stripe_count) {
652 dprintk("%s Bad first_stripe_index %u\n",
Andy Adamson16b374c2010-10-20 00:18:04 -0400653 __func__, fl->first_stripe_index);
654 goto out_put;
655 }
656
657 if ((fl->stripe_type == STRIPE_SPARSE &&
658 fl->num_fh > 1 && fl->num_fh != dsaddr->ds_num) ||
659 (fl->stripe_type == STRIPE_DENSE &&
660 fl->num_fh != dsaddr->stripe_count)) {
661 dprintk("%s num_fh %u not valid for given packing\n",
662 __func__, fl->num_fh);
663 goto out_put;
664 }
665
666 if (fl->stripe_unit % nfss->rsize || fl->stripe_unit % nfss->wsize) {
667 dprintk("%s Stripe unit (%u) not aligned with rsize %u "
668 "wsize %u\n", __func__, fl->stripe_unit, nfss->rsize,
669 nfss->wsize);
670 }
671
672 status = 0;
673out:
674 dprintk("--> %s returns %d\n", __func__, status);
675 return status;
676out_put:
Christoph Hellwigea8eecd2011-03-01 01:34:21 +0000677 nfs4_fl_put_deviceid(dsaddr);
Andy Adamson16b374c2010-10-20 00:18:04 -0400678 goto out;
679}
680
681static void filelayout_free_fh_array(struct nfs4_filelayout_segment *fl)
682{
683 int i;
684
685 for (i = 0; i < fl->num_fh; i++) {
686 if (!fl->fh_array[i])
687 break;
688 kfree(fl->fh_array[i]);
689 }
690 kfree(fl->fh_array);
691 fl->fh_array = NULL;
692}
693
694static void
695_filelayout_free_lseg(struct nfs4_filelayout_segment *fl)
696{
697 filelayout_free_fh_array(fl);
698 kfree(fl);
699}
700
701static int
702filelayout_decode_layout(struct pnfs_layout_hdr *flo,
703 struct nfs4_filelayout_segment *fl,
704 struct nfs4_layoutget_res *lgr,
Trond Myklebusta75b9df2011-05-11 18:00:51 -0400705 struct nfs4_deviceid *id,
706 gfp_t gfp_flags)
Andy Adamson16b374c2010-10-20 00:18:04 -0400707{
Weston Andros Adamson35124a02011-03-24 16:48:21 -0400708 struct xdr_stream stream;
Benny Halevyf7da7a12011-05-19 14:16:47 -0400709 struct xdr_buf buf;
Weston Andros Adamson35124a02011-03-24 16:48:21 -0400710 struct page *scratch;
711 __be32 *p;
Andy Adamson16b374c2010-10-20 00:18:04 -0400712 uint32_t nfl_util;
713 int i;
714
715 dprintk("%s: set_layout_map Begin\n", __func__);
716
Trond Myklebusta75b9df2011-05-11 18:00:51 -0400717 scratch = alloc_page(gfp_flags);
Weston Andros Adamson35124a02011-03-24 16:48:21 -0400718 if (!scratch)
719 return -ENOMEM;
720
Benny Halevyf7da7a12011-05-19 14:16:47 -0400721 xdr_init_decode_pages(&stream, &buf, lgr->layoutp->pages, lgr->layoutp->len);
Weston Andros Adamson35124a02011-03-24 16:48:21 -0400722 xdr_set_scratch_buffer(&stream, page_address(scratch), PAGE_SIZE);
723
724 /* 20 = ufl_util (4), first_stripe_index (4), pattern_offset (8),
725 * num_fh (4) */
726 p = xdr_inline_decode(&stream, NFS4_DEVICEID4_SIZE + 20);
727 if (unlikely(!p))
728 goto out_err;
729
Andy Adamson16b374c2010-10-20 00:18:04 -0400730 memcpy(id, p, sizeof(*id));
731 p += XDR_QUADLEN(NFS4_DEVICEID4_SIZE);
Benny Halevya1eaecb2011-05-19 22:14:47 -0400732 nfs4_print_deviceid(id);
Andy Adamson16b374c2010-10-20 00:18:04 -0400733
734 nfl_util = be32_to_cpup(p++);
735 if (nfl_util & NFL4_UFLG_COMMIT_THRU_MDS)
736 fl->commit_through_mds = 1;
737 if (nfl_util & NFL4_UFLG_DENSE)
738 fl->stripe_type = STRIPE_DENSE;
739 else
740 fl->stripe_type = STRIPE_SPARSE;
741 fl->stripe_unit = nfl_util & ~NFL4_UFLG_MASK;
742
743 fl->first_stripe_index = be32_to_cpup(p++);
744 p = xdr_decode_hyper(p, &fl->pattern_offset);
745 fl->num_fh = be32_to_cpup(p++);
746
747 dprintk("%s: nfl_util 0x%X num_fh %u fsi %u po %llu\n",
748 __func__, nfl_util, fl->num_fh, fl->first_stripe_index,
749 fl->pattern_offset);
750
Andy Adamsoncec765c2011-06-13 18:36:17 -0400751 /* Note that a zero value for num_fh is legal for STRIPE_SPARSE.
752 * Futher checking is done in filelayout_check_layout */
Chuck Levere4149662011-10-25 12:18:03 -0400753 if (fl->num_fh >
Andy Adamsoncec765c2011-06-13 18:36:17 -0400754 max(NFS4_PNFS_MAX_STRIPE_CNT, NFS4_PNFS_MAX_MULTI_CNT))
Weston Andros Adamson35124a02011-03-24 16:48:21 -0400755 goto out_err;
756
Andy Adamsoncec765c2011-06-13 18:36:17 -0400757 if (fl->num_fh > 0) {
Trond Myklebust1813bad2012-10-11 14:36:52 -0400758 fl->fh_array = kcalloc(fl->num_fh, sizeof(fl->fh_array[0]),
Andy Adamsoncec765c2011-06-13 18:36:17 -0400759 gfp_flags);
760 if (!fl->fh_array)
761 goto out_err;
762 }
Andy Adamson16b374c2010-10-20 00:18:04 -0400763
764 for (i = 0; i < fl->num_fh; i++) {
765 /* Do we want to use a mempool here? */
Trond Myklebusta75b9df2011-05-11 18:00:51 -0400766 fl->fh_array[i] = kmalloc(sizeof(struct nfs_fh), gfp_flags);
Weston Andros Adamson35124a02011-03-24 16:48:21 -0400767 if (!fl->fh_array[i])
768 goto out_err_free;
769
770 p = xdr_inline_decode(&stream, 4);
771 if (unlikely(!p))
772 goto out_err_free;
Andy Adamson16b374c2010-10-20 00:18:04 -0400773 fl->fh_array[i]->size = be32_to_cpup(p++);
774 if (sizeof(struct nfs_fh) < fl->fh_array[i]->size) {
Weston Andros Adamsonf9fd2d92012-01-26 13:32:22 -0500775 printk(KERN_ERR "NFS: Too big fh %d received %d\n",
Andy Adamson16b374c2010-10-20 00:18:04 -0400776 i, fl->fh_array[i]->size);
Weston Andros Adamson35124a02011-03-24 16:48:21 -0400777 goto out_err_free;
Andy Adamson16b374c2010-10-20 00:18:04 -0400778 }
Weston Andros Adamson35124a02011-03-24 16:48:21 -0400779
780 p = xdr_inline_decode(&stream, fl->fh_array[i]->size);
781 if (unlikely(!p))
782 goto out_err_free;
Andy Adamson16b374c2010-10-20 00:18:04 -0400783 memcpy(fl->fh_array[i]->data, p, fl->fh_array[i]->size);
Andy Adamson16b374c2010-10-20 00:18:04 -0400784 dprintk("DEBUG: %s: fh len %d\n", __func__,
785 fl->fh_array[i]->size);
786 }
787
Weston Andros Adamson35124a02011-03-24 16:48:21 -0400788 __free_page(scratch);
Andy Adamson16b374c2010-10-20 00:18:04 -0400789 return 0;
Weston Andros Adamson35124a02011-03-24 16:48:21 -0400790
791out_err_free:
792 filelayout_free_fh_array(fl);
793out_err:
794 __free_page(scratch);
795 return -EIO;
Andy Adamson16b374c2010-10-20 00:18:04 -0400796}
797
Fred Isamanc8795132011-03-23 13:27:49 +0000798static void
799filelayout_free_lseg(struct pnfs_layout_segment *lseg)
800{
801 struct nfs4_filelayout_segment *fl = FILELAYOUT_LSEG(lseg);
802
803 dprintk("--> %s\n", __func__);
804 nfs4_fl_put_deviceid(fl->dsaddr);
Fred Isaman799ba8d2012-04-20 14:47:38 -0400805 /* This assumes a single RW lseg */
806 if (lseg->pls_range.iomode == IOMODE_RW) {
807 struct nfs4_filelayout *flo;
808
809 flo = FILELAYOUT_FROM_HDR(lseg->pls_layout);
810 flo->commit_info.nbuckets = 0;
811 kfree(flo->commit_info.buckets);
812 flo->commit_info.buckets = NULL;
813 }
Fred Isamanc8795132011-03-23 13:27:49 +0000814 _filelayout_free_lseg(fl);
815}
816
Fred Isaman799ba8d2012-04-20 14:47:38 -0400817static int
818filelayout_alloc_commit_info(struct pnfs_layout_segment *lseg,
Fred Isamanea2cf222012-04-20 14:47:53 -0400819 struct nfs_commit_info *cinfo,
Fred Isaman799ba8d2012-04-20 14:47:38 -0400820 gfp_t gfp_flags)
821{
822 struct nfs4_filelayout_segment *fl = FILELAYOUT_LSEG(lseg);
Fred Isamanea2cf222012-04-20 14:47:53 -0400823 struct pnfs_commit_bucket *buckets;
Fred Isaman799ba8d2012-04-20 14:47:38 -0400824 int size;
825
826 if (fl->commit_through_mds)
827 return 0;
Fred Isamanea2cf222012-04-20 14:47:53 -0400828 if (cinfo->ds->nbuckets != 0) {
Fred Isaman799ba8d2012-04-20 14:47:38 -0400829 /* This assumes there is only one IOMODE_RW lseg. What
830 * we really want to do is have a layout_hdr level
831 * dictionary of <multipath_list4, fh> keys, each
832 * associated with a struct list_head, populated by calls
833 * to filelayout_write_pagelist().
834 * */
835 return 0;
836 }
837
838 size = (fl->stripe_type == STRIPE_SPARSE) ?
839 fl->dsaddr->ds_num : fl->dsaddr->stripe_count;
840
Fred Isamanea2cf222012-04-20 14:47:53 -0400841 buckets = kcalloc(size, sizeof(struct pnfs_commit_bucket),
Fred Isaman799ba8d2012-04-20 14:47:38 -0400842 gfp_flags);
843 if (!buckets)
844 return -ENOMEM;
845 else {
846 int i;
847
Fred Isamanea2cf222012-04-20 14:47:53 -0400848 spin_lock(cinfo->lock);
849 if (cinfo->ds->nbuckets != 0)
Fred Isaman799ba8d2012-04-20 14:47:38 -0400850 kfree(buckets);
851 else {
Fred Isamanea2cf222012-04-20 14:47:53 -0400852 cinfo->ds->buckets = buckets;
853 cinfo->ds->nbuckets = size;
Fred Isaman799ba8d2012-04-20 14:47:38 -0400854 for (i = 0; i < size; i++) {
855 INIT_LIST_HEAD(&buckets[i].written);
856 INIT_LIST_HEAD(&buckets[i].committing);
857 }
858 }
Fred Isamanea2cf222012-04-20 14:47:53 -0400859 spin_unlock(cinfo->lock);
Fred Isaman799ba8d2012-04-20 14:47:38 -0400860 return 0;
861 }
862}
863
Andy Adamson16b374c2010-10-20 00:18:04 -0400864static struct pnfs_layout_segment *
865filelayout_alloc_lseg(struct pnfs_layout_hdr *layoutid,
Trond Myklebusta75b9df2011-05-11 18:00:51 -0400866 struct nfs4_layoutget_res *lgr,
867 gfp_t gfp_flags)
Andy Adamson16b374c2010-10-20 00:18:04 -0400868{
869 struct nfs4_filelayout_segment *fl;
870 int rc;
871 struct nfs4_deviceid id;
872
873 dprintk("--> %s\n", __func__);
Trond Myklebusta75b9df2011-05-11 18:00:51 -0400874 fl = kzalloc(sizeof(*fl), gfp_flags);
Andy Adamson16b374c2010-10-20 00:18:04 -0400875 if (!fl)
876 return NULL;
877
Trond Myklebusta75b9df2011-05-11 18:00:51 -0400878 rc = filelayout_decode_layout(layoutid, fl, lgr, &id, gfp_flags);
879 if (rc != 0 || filelayout_check_layout(layoutid, fl, lgr, &id, gfp_flags)) {
Andy Adamson16b374c2010-10-20 00:18:04 -0400880 _filelayout_free_lseg(fl);
881 return NULL;
882 }
883 return &fl->generic_hdr;
884}
885
Fred Isaman94ad1c82011-03-01 01:34:14 +0000886/*
887 * filelayout_pg_test(). Called by nfs_can_coalesce_requests()
888 *
Benny Halevy18ad0a92011-05-25 21:03:56 +0300889 * return true : coalesce page
890 * return false : don't coalesce page
Fred Isaman94ad1c82011-03-01 01:34:14 +0000891 */
Trond Myklebust1751c362011-06-10 13:30:23 -0400892static bool
Fred Isaman94ad1c82011-03-01 01:34:14 +0000893filelayout_pg_test(struct nfs_pageio_descriptor *pgio, struct nfs_page *prev,
894 struct nfs_page *req)
895{
896 u64 p_stripe, r_stripe;
897 u32 stripe_unit;
898
Benny Halevy19345cb2011-06-19 18:33:46 -0400899 if (!pnfs_generic_pg_test(pgio, prev, req) ||
900 !nfs_generic_pg_test(pgio, prev, req))
901 return false;
Benny Halevy89a58e32011-05-25 20:54:40 +0300902
Fred Isamanb5542842012-04-20 14:47:43 -0400903 p_stripe = (u64)req_offset(prev);
904 r_stripe = (u64)req_offset(req);
Fred Isaman94ad1c82011-03-01 01:34:14 +0000905 stripe_unit = FILELAYOUT_LSEG(pgio->pg_lseg)->stripe_unit;
906
907 do_div(p_stripe, stripe_unit);
908 do_div(r_stripe, stripe_unit);
909
910 return (p_stripe == r_stripe);
911}
912
Trond Myklebust17280172012-03-11 13:11:00 -0400913static void
Andy Adamson7c24d942011-06-13 18:22:38 -0400914filelayout_pg_init_read(struct nfs_pageio_descriptor *pgio,
915 struct nfs_page *req)
916{
Trond Myklebustbc5a89b2012-10-15 14:58:04 -0400917 WARN_ON_ONCE(pgio->pg_lseg != NULL);
Andy Adamson7c24d942011-06-13 18:22:38 -0400918
Fred Isaman1825a0d2012-04-20 19:55:31 -0400919 if (req->wb_offset != req->wb_pgbase) {
920 /*
921 * Handling unaligned pages is difficult, because have to
922 * somehow split a req in two in certain cases in the
923 * pg.test code. Avoid this by just not using pnfs
924 * in this case.
925 */
926 nfs_pageio_reset_read_mds(pgio);
927 return;
928 }
Andy Adamson7c24d942011-06-13 18:22:38 -0400929 pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode,
930 req->wb_context,
931 0,
932 NFS4_MAX_UINT64,
933 IOMODE_READ,
934 GFP_KERNEL);
935 /* If no lseg, fall back to read through mds */
936 if (pgio->pg_lseg == NULL)
Trond Myklebust1f945352011-07-13 15:59:57 -0400937 nfs_pageio_reset_read_mds(pgio);
Andy Adamson7c24d942011-06-13 18:22:38 -0400938}
939
Trond Myklebust17280172012-03-11 13:11:00 -0400940static void
Andy Adamson7c24d942011-06-13 18:22:38 -0400941filelayout_pg_init_write(struct nfs_pageio_descriptor *pgio,
942 struct nfs_page *req)
943{
Fred Isamanea2cf222012-04-20 14:47:53 -0400944 struct nfs_commit_info cinfo;
Fred Isaman799ba8d2012-04-20 14:47:38 -0400945 int status;
946
Trond Myklebustbc5a89b2012-10-15 14:58:04 -0400947 WARN_ON_ONCE(pgio->pg_lseg != NULL);
Andy Adamson7c24d942011-06-13 18:22:38 -0400948
Fred Isaman1825a0d2012-04-20 19:55:31 -0400949 if (req->wb_offset != req->wb_pgbase)
950 goto out_mds;
Andy Adamson7c24d942011-06-13 18:22:38 -0400951 pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode,
952 req->wb_context,
953 0,
954 NFS4_MAX_UINT64,
955 IOMODE_RW,
956 GFP_NOFS);
957 /* If no lseg, fall back to write through mds */
958 if (pgio->pg_lseg == NULL)
Fred Isaman799ba8d2012-04-20 14:47:38 -0400959 goto out_mds;
Fred Isamanea2cf222012-04-20 14:47:53 -0400960 nfs_init_cinfo(&cinfo, pgio->pg_inode, pgio->pg_dreq);
961 status = filelayout_alloc_commit_info(pgio->pg_lseg, &cinfo, GFP_NOFS);
Fred Isaman799ba8d2012-04-20 14:47:38 -0400962 if (status < 0) {
Trond Myklebust9369a432012-09-18 20:57:08 -0400963 pnfs_put_lseg(pgio->pg_lseg);
Fred Isaman799ba8d2012-04-20 14:47:38 -0400964 pgio->pg_lseg = NULL;
965 goto out_mds;
966 }
967 return;
968out_mds:
969 nfs_pageio_reset_write_mds(pgio);
Andy Adamson7c24d942011-06-13 18:22:38 -0400970}
971
Trond Myklebust1751c362011-06-10 13:30:23 -0400972static const struct nfs_pageio_ops filelayout_pg_read_ops = {
Andy Adamson7c24d942011-06-13 18:22:38 -0400973 .pg_init = filelayout_pg_init_read,
Trond Myklebust1751c362011-06-10 13:30:23 -0400974 .pg_test = filelayout_pg_test,
Trond Myklebust493292d2011-07-13 15:58:28 -0400975 .pg_doio = pnfs_generic_pg_readpages,
Trond Myklebust1751c362011-06-10 13:30:23 -0400976};
977
978static const struct nfs_pageio_ops filelayout_pg_write_ops = {
Andy Adamson7c24d942011-06-13 18:22:38 -0400979 .pg_init = filelayout_pg_init_write,
Trond Myklebust1751c362011-06-10 13:30:23 -0400980 .pg_test = filelayout_pg_test,
Trond Myklebustdce81292011-07-13 15:59:19 -0400981 .pg_doio = pnfs_generic_pg_writepages,
Trond Myklebust1751c362011-06-10 13:30:23 -0400982};
983
Fred Isamane0c2b382011-03-23 13:27:53 +0000984static u32 select_bucket_index(struct nfs4_filelayout_segment *fl, u32 j)
985{
986 if (fl->stripe_type == STRIPE_SPARSE)
987 return nfs4_fl_calc_ds_index(&fl->generic_hdr, j);
988 else
989 return j;
990}
991
Fred Isamand6d6dc72012-03-08 17:29:35 -0500992/* The generic layer is about to remove the req from the commit list.
993 * If this will make the bucket empty, it will need to put the lseg reference.
Fred Isamand6d6dc72012-03-08 17:29:35 -0500994 */
Trond Myklebust8dd37752012-03-15 17:16:40 -0400995static void
Fred Isamanea2cf222012-04-20 14:47:53 -0400996filelayout_clear_request_commit(struct nfs_page *req,
997 struct nfs_commit_info *cinfo)
Fred Isamane0c2b382011-03-23 13:27:53 +0000998{
Trond Myklebust8dd37752012-03-15 17:16:40 -0400999 struct pnfs_layout_segment *freeme = NULL;
Trond Myklebust8dd37752012-03-15 17:16:40 -04001000
Fred Isamanea2cf222012-04-20 14:47:53 -04001001 spin_lock(cinfo->lock);
Trond Myklebust8dd37752012-03-15 17:16:40 -04001002 if (!test_and_clear_bit(PG_COMMIT_TO_DS, &req->wb_flags))
1003 goto out;
Fred Isamanea2cf222012-04-20 14:47:53 -04001004 cinfo->ds->nwritten--;
Fred Isamand6d6dc72012-03-08 17:29:35 -05001005 if (list_is_singular(&req->wb_list)) {
Fred Isamanea2cf222012-04-20 14:47:53 -04001006 struct pnfs_commit_bucket *bucket;
Fred Isamand6d6dc72012-03-08 17:29:35 -05001007
Fred Isaman799ba8d2012-04-20 14:47:38 -04001008 bucket = list_first_entry(&req->wb_list,
Fred Isamanea2cf222012-04-20 14:47:53 -04001009 struct pnfs_commit_bucket,
Fred Isaman799ba8d2012-04-20 14:47:38 -04001010 written);
1011 freeme = bucket->wlseg;
1012 bucket->wlseg = NULL;
Fred Isamand6d6dc72012-03-08 17:29:35 -05001013 }
Trond Myklebust8dd37752012-03-15 17:16:40 -04001014out:
Fred Isamanea2cf222012-04-20 14:47:53 -04001015 nfs_request_remove_commit_list(req, cinfo);
1016 spin_unlock(cinfo->lock);
Trond Myklebust9369a432012-09-18 20:57:08 -04001017 pnfs_put_lseg(freeme);
Fred Isamand6d6dc72012-03-08 17:29:35 -05001018}
1019
1020static struct list_head *
1021filelayout_choose_commit_list(struct nfs_page *req,
Fred Isamanea2cf222012-04-20 14:47:53 -04001022 struct pnfs_layout_segment *lseg,
1023 struct nfs_commit_info *cinfo)
Fred Isamand6d6dc72012-03-08 17:29:35 -05001024{
Fred Isamane0c2b382011-03-23 13:27:53 +00001025 struct nfs4_filelayout_segment *fl = FILELAYOUT_LSEG(lseg);
1026 u32 i, j;
1027 struct list_head *list;
Fred Isamanea2cf222012-04-20 14:47:53 -04001028 struct pnfs_commit_bucket *buckets;
Fred Isamane0c2b382011-03-23 13:27:53 +00001029
Fred Isamand6d6dc72012-03-08 17:29:35 -05001030 if (fl->commit_through_mds)
Fred Isamanea2cf222012-04-20 14:47:53 -04001031 return &cinfo->mds->list;
Fred Isamand6d6dc72012-03-08 17:29:35 -05001032
Fred Isamane0c2b382011-03-23 13:27:53 +00001033 /* Note that we are calling nfs4_fl_calc_j_index on each page
1034 * that ends up being committed to a data server. An attractive
1035 * alternative is to add a field to nfs_write_data and nfs_page
1036 * to store the value calculated in filelayout_write_pagelist
1037 * and just use that here.
1038 */
Fred Isamanb5542842012-04-20 14:47:43 -04001039 j = nfs4_fl_calc_j_index(lseg, req_offset(req));
Fred Isamane0c2b382011-03-23 13:27:53 +00001040 i = select_bucket_index(fl, j);
Fred Isamanea2cf222012-04-20 14:47:53 -04001041 buckets = cinfo->ds->buckets;
Fred Isaman799ba8d2012-04-20 14:47:38 -04001042 list = &buckets[i].written;
Fred Isamane0c2b382011-03-23 13:27:53 +00001043 if (list_empty(list)) {
Fred Isamand6d6dc72012-03-08 17:29:35 -05001044 /* Non-empty buckets hold a reference on the lseg. That ref
1045 * is normally transferred to the COMMIT call and released
1046 * there. It could also be released if the last req is pulled
1047 * off due to a rewrite, in which case it will be done in
Fred Isaman799ba8d2012-04-20 14:47:38 -04001048 * filelayout_clear_request_commit
Fred Isamand6d6dc72012-03-08 17:29:35 -05001049 */
Trond Myklebust9369a432012-09-18 20:57:08 -04001050 buckets[i].wlseg = pnfs_get_lseg(lseg);
Fred Isamane0c2b382011-03-23 13:27:53 +00001051 }
Trond Myklebust8dd37752012-03-15 17:16:40 -04001052 set_bit(PG_COMMIT_TO_DS, &req->wb_flags);
Fred Isamanea2cf222012-04-20 14:47:53 -04001053 cinfo->ds->nwritten++;
Fred Isamane0c2b382011-03-23 13:27:53 +00001054 return list;
1055}
1056
Trond Myklebust8dd37752012-03-15 17:16:40 -04001057static void
1058filelayout_mark_request_commit(struct nfs_page *req,
Fred Isamanea2cf222012-04-20 14:47:53 -04001059 struct pnfs_layout_segment *lseg,
1060 struct nfs_commit_info *cinfo)
Trond Myklebust8dd37752012-03-15 17:16:40 -04001061{
1062 struct list_head *list;
1063
Fred Isamanea2cf222012-04-20 14:47:53 -04001064 list = filelayout_choose_commit_list(req, lseg, cinfo);
1065 nfs_request_add_commit_list(req, list, cinfo);
Trond Myklebust8dd37752012-03-15 17:16:40 -04001066}
1067
Fred Isamane0c2b382011-03-23 13:27:53 +00001068static u32 calc_ds_index_from_commit(struct pnfs_layout_segment *lseg, u32 i)
1069{
1070 struct nfs4_filelayout_segment *flseg = FILELAYOUT_LSEG(lseg);
1071
1072 if (flseg->stripe_type == STRIPE_SPARSE)
1073 return i;
1074 else
1075 return nfs4_fl_calc_ds_index(lseg, i);
1076}
1077
1078static struct nfs_fh *
1079select_ds_fh_from_commit(struct pnfs_layout_segment *lseg, u32 i)
1080{
1081 struct nfs4_filelayout_segment *flseg = FILELAYOUT_LSEG(lseg);
1082
1083 if (flseg->stripe_type == STRIPE_SPARSE) {
1084 if (flseg->num_fh == 1)
1085 i = 0;
1086 else if (flseg->num_fh == 0)
1087 /* Use the MDS OPEN fh set in nfs_read_rpcsetup */
1088 return NULL;
1089 }
1090 return flseg->fh_array[i];
1091}
1092
Fred Isaman0b7c0152012-04-20 14:47:39 -04001093static int filelayout_initiate_commit(struct nfs_commit_data *data, int how)
Fred Isamane0c2b382011-03-23 13:27:53 +00001094{
1095 struct pnfs_layout_segment *lseg = data->lseg;
1096 struct nfs4_pnfs_ds *ds;
1097 u32 idx;
1098 struct nfs_fh *fh;
1099
1100 idx = calc_ds_index_from_commit(lseg, data->ds_commit_index);
1101 ds = nfs4_fl_prepare_ds(lseg, idx);
1102 if (!ds) {
Fred Isamane0c2b382011-03-23 13:27:53 +00001103 prepare_to_resend_writes(data);
Trond Myklebust8dd37752012-03-15 17:16:40 -04001104 filelayout_commit_release(data);
Fred Isamane0c2b382011-03-23 13:27:53 +00001105 return -EAGAIN;
1106 }
Andy Adamson3a7936c2012-04-27 17:53:51 -04001107 dprintk("%s ino %lu, how %d cl_count %d\n", __func__,
1108 data->inode->i_ino, how, atomic_read(&ds->ds_clp->cl_count));
Fred Isaman0b7c0152012-04-20 14:47:39 -04001109 data->commit_done_cb = filelayout_commit_done_cb;
Andy Adamson3a7936c2012-04-27 17:53:51 -04001110 atomic_inc(&ds->ds_clp->cl_count);
Fred Isamane0c2b382011-03-23 13:27:53 +00001111 data->ds_clp = ds->ds_clp;
1112 fh = select_ds_fh_from_commit(lseg, data->ds_commit_index);
1113 if (fh)
1114 data->args.fh = fh;
Fred Isaman0b7c0152012-04-20 14:47:39 -04001115 return nfs_initiate_commit(ds->ds_clp->cl_rpcclient, data,
Andy Adamson9f0ec1762012-04-27 17:53:44 -04001116 &filelayout_commit_call_ops, how,
1117 RPC_TASK_SOFTCONN);
Fred Isamane0c2b382011-03-23 13:27:53 +00001118}
1119
Trond Myklebust8dd37752012-03-15 17:16:40 -04001120static int
Fred Isaman1763da12012-04-20 14:47:57 -04001121transfer_commit_list(struct list_head *src, struct list_head *dst,
1122 struct nfs_commit_info *cinfo, int max)
Trond Myklebust8dd37752012-03-15 17:16:40 -04001123{
Trond Myklebust8dd37752012-03-15 17:16:40 -04001124 struct nfs_page *req, *tmp;
1125 int ret = 0;
1126
1127 list_for_each_entry_safe(req, tmp, src, wb_list) {
1128 if (!nfs_lock_request(req))
1129 continue;
Trond Myklebust53b8ee32012-05-22 16:36:27 -04001130 kref_get(&req->wb_kref);
Fred Isamanea2cf222012-04-20 14:47:53 -04001131 if (cond_resched_lock(cinfo->lock))
Trond Myklebust3b3be882012-03-17 11:59:30 -04001132 list_safe_reset_next(req, tmp, wb_list);
Fred Isamanea2cf222012-04-20 14:47:53 -04001133 nfs_request_remove_commit_list(req, cinfo);
Trond Myklebust8dd37752012-03-15 17:16:40 -04001134 clear_bit(PG_COMMIT_TO_DS, &req->wb_flags);
1135 nfs_list_add_request(req, dst);
1136 ret++;
Fred Isaman1763da12012-04-20 14:47:57 -04001137 if ((ret == max) && !cinfo->dreq)
Trond Myklebust8dd37752012-03-15 17:16:40 -04001138 break;
1139 }
Fred Isaman1763da12012-04-20 14:47:57 -04001140 return ret;
1141}
1142
1143static int
1144filelayout_scan_ds_commit_list(struct pnfs_commit_bucket *bucket,
1145 struct nfs_commit_info *cinfo,
1146 int max)
1147{
1148 struct list_head *src = &bucket->written;
1149 struct list_head *dst = &bucket->committing;
1150 int ret;
1151
1152 ret = transfer_commit_list(src, dst, cinfo, max);
Fred Isaman799ba8d2012-04-20 14:47:38 -04001153 if (ret) {
Fred Isamanea2cf222012-04-20 14:47:53 -04001154 cinfo->ds->nwritten -= ret;
1155 cinfo->ds->ncommitting += ret;
Fred Isaman799ba8d2012-04-20 14:47:38 -04001156 bucket->clseg = bucket->wlseg;
1157 if (list_empty(src))
1158 bucket->wlseg = NULL;
1159 else
Trond Myklebust9369a432012-09-18 20:57:08 -04001160 pnfs_get_lseg(bucket->clseg);
Fred Isaman799ba8d2012-04-20 14:47:38 -04001161 }
Trond Myklebust8dd37752012-03-15 17:16:40 -04001162 return ret;
1163}
1164
Fred Isamand6d6dc72012-03-08 17:29:35 -05001165/* Move reqs from written to committing lists, returning count of number moved.
Fred Isamanea2cf222012-04-20 14:47:53 -04001166 * Note called with cinfo->lock held.
Fred Isamand6d6dc72012-03-08 17:29:35 -05001167 */
Fred Isamanea2cf222012-04-20 14:47:53 -04001168static int filelayout_scan_commit_lists(struct nfs_commit_info *cinfo,
1169 int max)
Fred Isamand6d6dc72012-03-08 17:29:35 -05001170{
Fred Isamand6d6dc72012-03-08 17:29:35 -05001171 int i, rv = 0, cnt;
1172
Fred Isamanea2cf222012-04-20 14:47:53 -04001173 for (i = 0; i < cinfo->ds->nbuckets && max != 0; i++) {
1174 cnt = filelayout_scan_ds_commit_list(&cinfo->ds->buckets[i],
1175 cinfo, max);
Fred Isamand6d6dc72012-03-08 17:29:35 -05001176 max -= cnt;
1177 rv += cnt;
1178 }
Fred Isamand6d6dc72012-03-08 17:29:35 -05001179 return rv;
1180}
1181
Fred Isaman1763da12012-04-20 14:47:57 -04001182/* Pull everything off the committing lists and dump into @dst */
1183static void filelayout_recover_commit_reqs(struct list_head *dst,
1184 struct nfs_commit_info *cinfo)
1185{
1186 struct pnfs_commit_bucket *b;
1187 int i;
1188
1189 /* NOTE cinfo->lock is NOT held, relying on fact that this is
1190 * only called on single thread per dreq.
Trond Myklebust9369a432012-09-18 20:57:08 -04001191 * Can't take the lock because need to do pnfs_put_lseg
Fred Isaman1763da12012-04-20 14:47:57 -04001192 */
1193 for (i = 0, b = cinfo->ds->buckets; i < cinfo->ds->nbuckets; i++, b++) {
1194 if (transfer_commit_list(&b->written, dst, cinfo, 0)) {
Trond Myklebust9369a432012-09-18 20:57:08 -04001195 pnfs_put_lseg(b->wlseg);
Fred Isaman1763da12012-04-20 14:47:57 -04001196 b->wlseg = NULL;
1197 }
1198 }
1199 cinfo->ds->nwritten = 0;
1200}
1201
Trond Myklebust9390f422012-03-16 13:52:45 -04001202static unsigned int
Fred Isamanea2cf222012-04-20 14:47:53 -04001203alloc_ds_commits(struct nfs_commit_info *cinfo, struct list_head *list)
Fred Isamane0c2b382011-03-23 13:27:53 +00001204{
Fred Isamanea2cf222012-04-20 14:47:53 -04001205 struct pnfs_ds_commit_info *fl_cinfo;
1206 struct pnfs_commit_bucket *bucket;
Fred Isaman0b7c0152012-04-20 14:47:39 -04001207 struct nfs_commit_data *data;
Fred Isamane0c2b382011-03-23 13:27:53 +00001208 int i, j;
Trond Myklebust9390f422012-03-16 13:52:45 -04001209 unsigned int nreq = 0;
Fred Isamane0c2b382011-03-23 13:27:53 +00001210
Fred Isamanea2cf222012-04-20 14:47:53 -04001211 fl_cinfo = cinfo->ds;
Fred Isaman799ba8d2012-04-20 14:47:38 -04001212 bucket = fl_cinfo->buckets;
1213 for (i = 0; i < fl_cinfo->nbuckets; i++, bucket++) {
1214 if (list_empty(&bucket->committing))
Fred Isamane0c2b382011-03-23 13:27:53 +00001215 continue;
1216 data = nfs_commitdata_alloc();
1217 if (!data)
Trond Myklebust9390f422012-03-16 13:52:45 -04001218 break;
Fred Isamane0c2b382011-03-23 13:27:53 +00001219 data->ds_commit_index = i;
Fred Isaman799ba8d2012-04-20 14:47:38 -04001220 data->lseg = bucket->clseg;
1221 bucket->clseg = NULL;
Fred Isamane0c2b382011-03-23 13:27:53 +00001222 list_add(&data->pages, list);
Trond Myklebust9390f422012-03-16 13:52:45 -04001223 nreq++;
Fred Isamane0c2b382011-03-23 13:27:53 +00001224 }
Fred Isamane0c2b382011-03-23 13:27:53 +00001225
Trond Myklebust9390f422012-03-16 13:52:45 -04001226 /* Clean up on error */
Fred Isaman799ba8d2012-04-20 14:47:38 -04001227 for (j = i; j < fl_cinfo->nbuckets; j++, bucket++) {
1228 if (list_empty(&bucket->committing))
Fred Isamane0c2b382011-03-23 13:27:53 +00001229 continue;
Fred Isamanea2cf222012-04-20 14:47:53 -04001230 nfs_retry_commit(&bucket->committing, bucket->clseg, cinfo);
Trond Myklebust9369a432012-09-18 20:57:08 -04001231 pnfs_put_lseg(bucket->clseg);
Fred Isaman799ba8d2012-04-20 14:47:38 -04001232 bucket->clseg = NULL;
Fred Isamane0c2b382011-03-23 13:27:53 +00001233 }
Fred Isamane0c2b382011-03-23 13:27:53 +00001234 /* Caller will clean up entries put on list */
Trond Myklebust9390f422012-03-16 13:52:45 -04001235 return nreq;
Fred Isamane0c2b382011-03-23 13:27:53 +00001236}
1237
1238/* This follows nfs_commit_list pretty closely */
1239static int
1240filelayout_commit_pagelist(struct inode *inode, struct list_head *mds_pages,
Fred Isamanea2cf222012-04-20 14:47:53 -04001241 int how, struct nfs_commit_info *cinfo)
Fred Isamane0c2b382011-03-23 13:27:53 +00001242{
Fred Isaman0b7c0152012-04-20 14:47:39 -04001243 struct nfs_commit_data *data, *tmp;
Fred Isamane0c2b382011-03-23 13:27:53 +00001244 LIST_HEAD(list);
Trond Myklebust9390f422012-03-16 13:52:45 -04001245 unsigned int nreq = 0;
Fred Isamane0c2b382011-03-23 13:27:53 +00001246
1247 if (!list_empty(mds_pages)) {
1248 data = nfs_commitdata_alloc();
Trond Myklebust9390f422012-03-16 13:52:45 -04001249 if (data != NULL) {
1250 data->lseg = NULL;
1251 list_add(&data->pages, &list);
1252 nreq++;
1253 } else
Fred Isamanea2cf222012-04-20 14:47:53 -04001254 nfs_retry_commit(mds_pages, NULL, cinfo);
Fred Isamane0c2b382011-03-23 13:27:53 +00001255 }
1256
Fred Isamanea2cf222012-04-20 14:47:53 -04001257 nreq += alloc_ds_commits(cinfo, &list);
Trond Myklebust9390f422012-03-16 13:52:45 -04001258
1259 if (nreq == 0) {
Fred Isamanf453a542012-04-20 14:47:54 -04001260 cinfo->completion_ops->error_cleanup(NFS_I(inode));
Trond Myklebust9390f422012-03-16 13:52:45 -04001261 goto out;
1262 }
1263
Fred Isamanea2cf222012-04-20 14:47:53 -04001264 atomic_add(nreq, &cinfo->mds->rpcs_out);
Fred Isamane0c2b382011-03-23 13:27:53 +00001265
1266 list_for_each_entry_safe(data, tmp, &list, pages) {
1267 list_del_init(&data->pages);
Fred Isamane0c2b382011-03-23 13:27:53 +00001268 if (!data->lseg) {
Fred Isamanf453a542012-04-20 14:47:54 -04001269 nfs_init_commit(data, mds_pages, NULL, cinfo);
Fred Isaman0b7c0152012-04-20 14:47:39 -04001270 nfs_initiate_commit(NFS_CLIENT(inode), data,
Andy Adamson9f0ec1762012-04-27 17:53:44 -04001271 data->mds_ops, how, 0);
Fred Isamane0c2b382011-03-23 13:27:53 +00001272 } else {
Fred Isamanea2cf222012-04-20 14:47:53 -04001273 struct pnfs_commit_bucket *buckets;
Fred Isaman799ba8d2012-04-20 14:47:38 -04001274
Fred Isamanea2cf222012-04-20 14:47:53 -04001275 buckets = cinfo->ds->buckets;
Fred Isamanf453a542012-04-20 14:47:54 -04001276 nfs_init_commit(data, &buckets[data->ds_commit_index].committing, data->lseg, cinfo);
Fred Isamane0c2b382011-03-23 13:27:53 +00001277 filelayout_initiate_commit(data, how);
1278 }
1279 }
Trond Myklebust9390f422012-03-16 13:52:45 -04001280out:
Fred Isamanea2cf222012-04-20 14:47:53 -04001281 cinfo->ds->ncommitting = 0;
Trond Myklebust9390f422012-03-16 13:52:45 -04001282 return PNFS_ATTEMPTED;
Fred Isamane0c2b382011-03-23 13:27:53 +00001283}
1284
Benny Halevy1775bc32011-05-20 13:47:33 +02001285static void
1286filelayout_free_deveiceid_node(struct nfs4_deviceid_node *d)
1287{
1288 nfs4_fl_free_deviceid(container_of(d, struct nfs4_file_layout_dsaddr, id_node));
1289}
1290
Fred Isaman799ba8d2012-04-20 14:47:38 -04001291static struct pnfs_layout_hdr *
1292filelayout_alloc_layout_hdr(struct inode *inode, gfp_t gfp_flags)
1293{
1294 struct nfs4_filelayout *flo;
1295
1296 flo = kzalloc(sizeof(*flo), gfp_flags);
1297 return &flo->generic_hdr;
1298}
1299
1300static void
1301filelayout_free_layout_hdr(struct pnfs_layout_hdr *lo)
1302{
1303 kfree(FILELAYOUT_FROM_HDR(lo));
1304}
1305
Fred Isamanea2cf222012-04-20 14:47:53 -04001306static struct pnfs_ds_commit_info *
1307filelayout_get_ds_info(struct inode *inode)
1308{
Fred Isamandf011742012-04-24 14:50:34 -04001309 struct pnfs_layout_hdr *layout = NFS_I(inode)->layout;
1310
1311 if (layout == NULL)
1312 return NULL;
1313 else
1314 return &FILELAYOUT_FROM_HDR(layout)->commit_info;
Fred Isamanea2cf222012-04-20 14:47:53 -04001315}
1316
Dean Hildebrand7ab672c2010-10-20 00:18:00 -04001317static struct pnfs_layoutdriver_type filelayout_type = {
Christoph Hellwigea8eecd2011-03-01 01:34:21 +00001318 .id = LAYOUT_NFSV4_1_FILES,
1319 .name = "LAYOUT_NFSV4_1_FILES",
1320 .owner = THIS_MODULE,
Fred Isaman799ba8d2012-04-20 14:47:38 -04001321 .alloc_layout_hdr = filelayout_alloc_layout_hdr,
1322 .free_layout_hdr = filelayout_free_layout_hdr,
Christoph Hellwigea8eecd2011-03-01 01:34:21 +00001323 .alloc_lseg = filelayout_alloc_lseg,
1324 .free_lseg = filelayout_free_lseg,
Trond Myklebust1751c362011-06-10 13:30:23 -04001325 .pg_read_ops = &filelayout_pg_read_ops,
1326 .pg_write_ops = &filelayout_pg_write_ops,
Fred Isamanea2cf222012-04-20 14:47:53 -04001327 .get_ds_info = &filelayout_get_ds_info,
Trond Myklebust8dd37752012-03-15 17:16:40 -04001328 .mark_request_commit = filelayout_mark_request_commit,
1329 .clear_request_commit = filelayout_clear_request_commit,
Fred Isamand6d6dc72012-03-08 17:29:35 -05001330 .scan_commit_lists = filelayout_scan_commit_lists,
Fred Isaman1763da12012-04-20 14:47:57 -04001331 .recover_commit_reqs = filelayout_recover_commit_reqs,
Fred Isamane0c2b382011-03-23 13:27:53 +00001332 .commit_pagelist = filelayout_commit_pagelist,
Andy Adamsondc70d7b2011-03-01 01:34:19 +00001333 .read_pagelist = filelayout_read_pagelist,
Andy Adamson0382b742011-03-03 15:13:45 +00001334 .write_pagelist = filelayout_write_pagelist,
Benny Halevy1775bc32011-05-20 13:47:33 +02001335 .free_deviceid_node = filelayout_free_deveiceid_node,
Dean Hildebrand7ab672c2010-10-20 00:18:00 -04001336};
1337
1338static int __init nfs4filelayout_init(void)
1339{
1340 printk(KERN_INFO "%s: NFSv4 File Layout Driver Registering...\n",
1341 __func__);
1342 return pnfs_register_layoutdriver(&filelayout_type);
1343}
1344
1345static void __exit nfs4filelayout_exit(void)
1346{
1347 printk(KERN_INFO "%s: NFSv4 File Layout Driver Unregistering...\n",
1348 __func__);
1349 pnfs_unregister_layoutdriver(&filelayout_type);
1350}
1351
J. Bruce Fieldsf85ef692011-07-15 19:18:42 -04001352MODULE_ALIAS("nfs-layouttype4-1");
1353
Dean Hildebrand7ab672c2010-10-20 00:18:00 -04001354module_init(nfs4filelayout_init);
1355module_exit(nfs4filelayout_exit);