4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2011, 2012, Intel Corporation.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * lustre/llite/llite_close.c
38 * Lustre Lite routines to issue a secondary close after writeback
41 #include <linux/module.h>
43 #define DEBUG_SUBSYSTEM S_LLITE
45 #include "llite_internal.h"
47 /** records that a write is in flight */
48 void vvp_write_pending(struct ccc_object *club, struct ccc_page *page)
50 struct ll_inode_info *lli = ll_i2info(club->cob_inode);
53 spin_lock(&lli->lli_lock);
54 lli->lli_flags |= LLIF_SOM_DIRTY;
55 if (page != NULL && list_empty(&page->cpg_pending_linkage))
56 list_add(&page->cpg_pending_linkage,
57 &club->cob_pending_list);
58 spin_unlock(&lli->lli_lock);
62 /** records that a write has completed */
63 void vvp_write_complete(struct ccc_object *club, struct ccc_page *page)
65 struct ll_inode_info *lli = ll_i2info(club->cob_inode);
69 spin_lock(&lli->lli_lock);
70 if (page != NULL && !list_empty(&page->cpg_pending_linkage)) {
71 list_del_init(&page->cpg_pending_linkage);
74 spin_unlock(&lli->lli_lock);
76 ll_queue_done_writing(club->cob_inode, 0);
80 /** Queues DONE_WRITING if
81 * - done writing is allowed;
82 * - inode has no no dirty pages; */
83 void ll_queue_done_writing(struct inode *inode, unsigned long flags)
85 struct ll_inode_info *lli = ll_i2info(inode);
86 struct ccc_object *club = cl2ccc(ll_i2info(inode)->lli_clob);
89 spin_lock(&lli->lli_lock);
90 lli->lli_flags |= flags;
92 if ((lli->lli_flags & LLIF_DONE_WRITING) &&
93 list_empty(&club->cob_pending_list)) {
94 struct ll_close_queue *lcq = ll_i2sbi(inode)->ll_lcq;
96 if (lli->lli_flags & LLIF_MDS_SIZE_LOCK)
97 CWARN("%s: file "DFID"(flags %u) Size-on-MDS valid, "
98 "done writing allowed and no diry pages\n",
99 ll_get_fsname(inode->i_sb, NULL, 0),
100 PFID(ll_inode2fid(inode)), lli->lli_flags);
101 /* DONE_WRITING is allowed and inode has no dirty page. */
102 spin_lock(&lcq->lcq_lock);
104 LASSERT(list_empty(&lli->lli_close_list));
105 CDEBUG(D_INODE, "adding inode "DFID" to close list\n",
106 PFID(ll_inode2fid(inode)));
107 list_add_tail(&lli->lli_close_list, &lcq->lcq_head);
109 /* Avoid a concurrent insertion into the close thread queue:
110 * an inode is already in the close thread, open(), write(),
111 * close() happen, epoch is closed as the inode is marked as
112 * LLIF_EPOCH_PENDING. When pages are written inode should not
113 * be inserted into the queue again, clear this flag to avoid
115 lli->lli_flags &= ~LLIF_DONE_WRITING;
117 wake_up(&lcq->lcq_waitq);
118 spin_unlock(&lcq->lcq_lock);
120 spin_unlock(&lli->lli_lock);
124 /** Pack SOM attributes info @opdata for CLOSE, DONE_WRITING rpc. */
125 void ll_done_writing_attr(struct inode *inode, struct md_op_data *op_data)
127 struct ll_inode_info *lli = ll_i2info(inode);
130 op_data->op_flags |= MF_SOM_CHANGE;
131 /* Check if Size-on-MDS attributes are valid. */
132 if (lli->lli_flags & LLIF_MDS_SIZE_LOCK)
133 CERROR("%s: inode "DFID"(flags %u) MDS holds lock on "
134 "Size-on-MDS attributes\n",
135 ll_get_fsname(inode->i_sb, NULL, 0),
136 PFID(ll_inode2fid(inode)), lli->lli_flags);
138 if (!cl_local_size(inode)) {
139 /* Send Size-on-MDS Attributes if valid. */
140 op_data->op_attr.ia_valid |= ATTR_MTIME_SET | ATTR_CTIME_SET |
141 ATTR_ATIME_SET | ATTR_SIZE | ATTR_BLOCKS;
146 /** Closes ioepoch and packs Size-on-MDS attribute if needed into @op_data. */
147 void ll_ioepoch_close(struct inode *inode, struct md_op_data *op_data,
148 struct obd_client_handle **och, unsigned long flags)
150 struct ll_inode_info *lli = ll_i2info(inode);
151 struct ccc_object *club = cl2ccc(ll_i2info(inode)->lli_clob);
154 spin_lock(&lli->lli_lock);
155 if (!(list_empty(&club->cob_pending_list))) {
156 if (!(lli->lli_flags & LLIF_EPOCH_PENDING)) {
157 LASSERT(*och != NULL);
158 LASSERT(lli->lli_pending_och == NULL);
159 /* Inode is dirty and there is no pending write done
160 * request yet, DONE_WRITE is to be sent later. */
161 lli->lli_flags |= LLIF_EPOCH_PENDING;
162 lli->lli_pending_och = *och;
163 spin_unlock(&lli->lli_lock);
165 inode = igrab(inode);
169 if (flags & LLIF_DONE_WRITING) {
170 /* Some pages are still dirty, it is early to send
171 * DONE_WRITE. Wait untill all pages will be flushed
172 * and try DONE_WRITE again later. */
173 LASSERT(!(lli->lli_flags & LLIF_DONE_WRITING));
174 lli->lli_flags |= LLIF_DONE_WRITING;
175 spin_unlock(&lli->lli_lock);
177 inode = igrab(inode);
182 CDEBUG(D_INODE, "Epoch "LPU64" closed on "DFID"\n",
183 ll_i2info(inode)->lli_ioepoch, PFID(&lli->lli_fid));
184 op_data->op_flags |= MF_EPOCH_CLOSE;
186 if (flags & LLIF_DONE_WRITING) {
187 LASSERT(lli->lli_flags & LLIF_SOM_DIRTY);
188 LASSERT(!(lli->lli_flags & LLIF_DONE_WRITING));
189 *och = lli->lli_pending_och;
190 lli->lli_pending_och = NULL;
191 lli->lli_flags &= ~LLIF_EPOCH_PENDING;
193 /* Pack Size-on-MDS inode attributes only if they has changed */
194 if (!(lli->lli_flags & LLIF_SOM_DIRTY)) {
195 spin_unlock(&lli->lli_lock);
199 /* There is a pending DONE_WRITE -- close epoch with no
200 * attribute change. */
201 if (lli->lli_flags & LLIF_EPOCH_PENDING) {
202 spin_unlock(&lli->lli_lock);
207 LASSERT(list_empty(&club->cob_pending_list));
208 lli->lli_flags &= ~LLIF_SOM_DIRTY;
209 spin_unlock(&lli->lli_lock);
210 ll_done_writing_attr(inode, op_data);
218 * Cliens updates SOM attributes on MDS (including llog cookies):
219 * obd_getattr with no lock and md_setattr.
221 int ll_som_update(struct inode *inode, struct md_op_data *op_data)
223 struct ll_inode_info *lli = ll_i2info(inode);
224 struct ptlrpc_request *request = NULL;
230 LASSERT(op_data != NULL);
231 if (lli->lli_flags & LLIF_MDS_SIZE_LOCK)
232 CERROR("%s: inode "DFID"(flags %u) MDS holds lock on "
233 "Size-on-MDS attributes\n",
234 ll_get_fsname(inode->i_sb, NULL, 0),
235 PFID(ll_inode2fid(inode)), lli->lli_flags);
239 CERROR("can't allocate memory for Size-on-MDS update.\n");
243 old_flags = op_data->op_flags;
244 op_data->op_flags = MF_SOM_CHANGE;
246 /* If inode is already in another epoch, skip getattr from OSTs. */
247 if (lli->lli_ioepoch == op_data->op_ioepoch) {
248 rc = ll_inode_getattr(inode, oa, op_data->op_ioepoch,
249 old_flags & MF_GETATTR_LOCK);
253 CERROR("%s: inode_getattr failed - unable to "
254 "send a Size-on-MDS attribute update "
255 "for inode "DFID": rc = %d\n",
256 ll_get_fsname(inode->i_sb, NULL, 0),
257 PFID(ll_inode2fid(inode)), rc);
259 CDEBUG(D_INODE, "Size-on-MDS update on "DFID"\n",
260 PFID(&lli->lli_fid));
262 /* Install attributes into op_data. */
263 md_from_obdo(op_data, oa, oa->o_valid);
266 rc = md_setattr(ll_i2sbi(inode)->ll_md_exp, op_data,
267 NULL, 0, NULL, 0, &request, NULL);
268 ptlrpc_req_finished(request);
275 * Closes the ioepoch and packs all the attributes into @op_data for
278 static void ll_prepare_done_writing(struct inode *inode,
279 struct md_op_data *op_data,
280 struct obd_client_handle **och)
282 ll_ioepoch_close(inode, op_data, och, LLIF_DONE_WRITING);
283 /* If there is no @och, we do not do D_W yet. */
287 ll_pack_inode2opdata(inode, op_data, &(*och)->och_fh);
288 ll_prep_md_op_data(op_data, inode, NULL, NULL,
289 0, 0, LUSTRE_OPC_ANY, NULL);
292 /** Send a DONE_WRITING rpc. */
293 static void ll_done_writing(struct inode *inode)
295 struct obd_client_handle *och = NULL;
296 struct md_op_data *op_data;
300 LASSERT(exp_connect_som(ll_i2mdexp(inode)));
302 OBD_ALLOC_PTR(op_data);
303 if (op_data == NULL) {
304 CERROR("can't allocate op_data\n");
309 ll_prepare_done_writing(inode, op_data, &och);
310 /* If there is no @och, we do not do D_W yet. */
314 rc = md_done_writing(ll_i2sbi(inode)->ll_md_exp, op_data, NULL);
316 /* MDS has instructed us to obtain Size-on-MDS attribute from
317 * OSTs and send setattr to back to MDS. */
318 rc = ll_som_update(inode, op_data);
320 CERROR("%s: inode "DFID" mdc done_writing failed: rc = %d\n",
321 ll_get_fsname(inode->i_sb, NULL, 0),
322 PFID(ll_inode2fid(inode)), rc);
325 ll_finish_md_op_data(op_data);
327 md_clear_open_replay_data(ll_i2sbi(inode)->ll_md_exp, och);
333 static struct ll_inode_info *ll_close_next_lli(struct ll_close_queue *lcq)
335 struct ll_inode_info *lli = NULL;
337 spin_lock(&lcq->lcq_lock);
339 if (!list_empty(&lcq->lcq_head)) {
340 lli = list_entry(lcq->lcq_head.next, struct ll_inode_info,
342 list_del_init(&lli->lli_close_list);
343 } else if (atomic_read(&lcq->lcq_stop))
344 lli = ERR_PTR(-EALREADY);
346 spin_unlock(&lcq->lcq_lock);
350 static int ll_close_thread(void *arg)
352 struct ll_close_queue *lcq = arg;
355 complete(&lcq->lcq_comp);
358 struct l_wait_info lwi = { 0 };
359 struct ll_inode_info *lli;
362 l_wait_event_exclusive(lcq->lcq_waitq,
363 (lli = ll_close_next_lli(lcq)) != NULL,
368 inode = ll_info2i(lli);
369 CDEBUG(D_INFO, "done_writting for inode "DFID"\n",
370 PFID(ll_inode2fid(inode)));
371 ll_done_writing(inode);
375 CDEBUG(D_INFO, "ll_close exiting\n");
376 complete(&lcq->lcq_comp);
380 int ll_close_thread_start(struct ll_close_queue **lcq_ret)
382 struct ll_close_queue *lcq;
383 struct task_struct *task;
385 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_CLOSE_THREAD))
388 OBD_ALLOC(lcq, sizeof(*lcq));
392 spin_lock_init(&lcq->lcq_lock);
393 INIT_LIST_HEAD(&lcq->lcq_head);
394 init_waitqueue_head(&lcq->lcq_waitq);
395 init_completion(&lcq->lcq_comp);
397 task = kthread_run(ll_close_thread, lcq, "ll_close");
399 OBD_FREE(lcq, sizeof(*lcq));
400 return PTR_ERR(task);
403 wait_for_completion(&lcq->lcq_comp);
408 void ll_close_thread_shutdown(struct ll_close_queue *lcq)
410 init_completion(&lcq->lcq_comp);
411 atomic_inc(&lcq->lcq_stop);
412 wake_up(&lcq->lcq_waitq);
413 wait_for_completion(&lcq->lcq_comp);
414 OBD_FREE(lcq, sizeof(*lcq));