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v4.17
 
  1/*
  2 * Copyright (c) 2000-2003 Silicon Graphics, Inc.
  3 * All Rights Reserved.
  4 *
  5 * This program is free software; you can redistribute it and/or
  6 * modify it under the terms of the GNU General Public License as
  7 * published by the Free Software Foundation.
  8 *
  9 * This program is distributed in the hope that it would be useful,
 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 12 * GNU General Public License for more details.
 13 *
 14 * You should have received a copy of the GNU General Public License
 15 * along with this program; if not, write the Free Software Foundation,
 16 * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 17 */
 18#include "xfs.h"
 19#include "xfs_fs.h"
 
 20#include "xfs_format.h"
 21#include "xfs_log_format.h"
 22#include "xfs_trans_resv.h"
 23#include "xfs_mount.h"
 24#include "xfs_inode.h"
 25#include "xfs_quota.h"
 26#include "xfs_error.h"
 27#include "xfs_trans.h"
 28#include "xfs_buf_item.h"
 29#include "xfs_trans_priv.h"
 30#include "xfs_qm.h"
 31#include "xfs_log.h"
 
 32
 33static inline struct xfs_dq_logitem *DQUOT_ITEM(struct xfs_log_item *lip)
 34{
 35	return container_of(lip, struct xfs_dq_logitem, qli_item);
 36}
 37
 38/*
 39 * returns the number of iovecs needed to log the given dquot item.
 40 */
 41STATIC void
 42xfs_qm_dquot_logitem_size(
 43	struct xfs_log_item	*lip,
 44	int			*nvecs,
 45	int			*nbytes)
 46{
 47	*nvecs += 2;
 48	*nbytes += sizeof(struct xfs_dq_logformat) +
 49		   sizeof(struct xfs_disk_dquot);
 50}
 51
 52/*
 53 * fills in the vector of log iovecs for the given dquot log item.
 54 */
 55STATIC void
 56xfs_qm_dquot_logitem_format(
 57	struct xfs_log_item	*lip,
 58	struct xfs_log_vec	*lv)
 59{
 
 60	struct xfs_dq_logitem	*qlip = DQUOT_ITEM(lip);
 61	struct xfs_log_iovec	*vecp = NULL;
 62	struct xfs_dq_logformat	*qlf;
 63
 64	qlf = xlog_prepare_iovec(lv, &vecp, XLOG_REG_TYPE_QFORMAT);
 65	qlf->qlf_type = XFS_LI_DQUOT;
 66	qlf->qlf_size = 2;
 67	qlf->qlf_id = be32_to_cpu(qlip->qli_dquot->q_core.d_id);
 68	qlf->qlf_blkno = qlip->qli_dquot->q_blkno;
 69	qlf->qlf_len = 1;
 70	qlf->qlf_boffset = qlip->qli_dquot->q_bufoffset;
 71	xlog_finish_iovec(lv, vecp, sizeof(struct xfs_dq_logformat));
 72
 73	xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_DQUOT,
 74			&qlip->qli_dquot->q_core,
 
 75			sizeof(struct xfs_disk_dquot));
 76}
 77
 78/*
 79 * Increment the pin count of the given dquot.
 80 */
 81STATIC void
 82xfs_qm_dquot_logitem_pin(
 83	struct xfs_log_item	*lip)
 84{
 85	struct xfs_dquot	*dqp = DQUOT_ITEM(lip)->qli_dquot;
 86
 87	ASSERT(XFS_DQ_IS_LOCKED(dqp));
 88	atomic_inc(&dqp->q_pincount);
 89}
 90
 91/*
 92 * Decrement the pin count of the given dquot, and wake up
 93 * anyone in xfs_dqwait_unpin() if the count goes to 0.	 The
 94 * dquot must have been previously pinned with a call to
 95 * xfs_qm_dquot_logitem_pin().
 96 */
 97STATIC void
 98xfs_qm_dquot_logitem_unpin(
 99	struct xfs_log_item	*lip,
100	int			remove)
101{
102	struct xfs_dquot	*dqp = DQUOT_ITEM(lip)->qli_dquot;
103
104	ASSERT(atomic_read(&dqp->q_pincount) > 0);
105	if (atomic_dec_and_test(&dqp->q_pincount))
106		wake_up(&dqp->q_pinwait);
107}
108
109STATIC xfs_lsn_t
110xfs_qm_dquot_logitem_committed(
111	struct xfs_log_item	*lip,
112	xfs_lsn_t		lsn)
113{
114	/*
115	 * We always re-log the entire dquot when it becomes dirty,
116	 * so, the latest copy _is_ the only one that matters.
117	 */
118	return lsn;
119}
120
121/*
122 * This is called to wait for the given dquot to be unpinned.
123 * Most of these pin/unpin routines are plagiarized from inode code.
124 */
125void
126xfs_qm_dqunpin_wait(
127	struct xfs_dquot	*dqp)
128{
129	ASSERT(XFS_DQ_IS_LOCKED(dqp));
130	if (atomic_read(&dqp->q_pincount) == 0)
131		return;
132
133	/*
134	 * Give the log a push so we don't wait here too long.
135	 */
136	xfs_log_force(dqp->q_mount, 0);
137	wait_event(dqp->q_pinwait, (atomic_read(&dqp->q_pincount) == 0));
138}
139
140/*
141 * Callback used to mark a buffer with XFS_LI_FAILED when items in the buffer
142 * have been failed during writeback
143 *
144 * this informs the AIL that the dquot is already flush locked on the next push,
145 * and acquires a hold on the buffer to ensure that it isn't reclaimed before
146 * dirty data makes it to disk.
147 */
148STATIC void
149xfs_dquot_item_error(
150	struct xfs_log_item	*lip,
151	struct xfs_buf		*bp)
152{
153	ASSERT(!completion_done(&DQUOT_ITEM(lip)->qli_dquot->q_flush));
154	xfs_set_li_failed(lip, bp);
155}
156
157STATIC uint
158xfs_qm_dquot_logitem_push(
159	struct xfs_log_item	*lip,
160	struct list_head	*buffer_list)
161		__releases(&lip->li_ailp->ail_lock)
162		__acquires(&lip->li_ailp->ail_lock)
163{
164	struct xfs_dquot	*dqp = DQUOT_ITEM(lip)->qli_dquot;
165	struct xfs_buf		*bp = lip->li_buf;
 
166	uint			rval = XFS_ITEM_SUCCESS;
167	int			error;
168
169	if (atomic_read(&dqp->q_pincount) > 0)
170		return XFS_ITEM_PINNED;
171
172	/*
173	 * The buffer containing this item failed to be written back
174	 * previously. Resubmit the buffer for IO
175	 */
176	if (lip->li_flags & XFS_LI_FAILED) {
177		if (!xfs_buf_trylock(bp))
178			return XFS_ITEM_LOCKED;
179
180		if (!xfs_buf_resubmit_failed_buffers(bp, buffer_list))
181			rval = XFS_ITEM_FLUSHING;
182
183		xfs_buf_unlock(bp);
184		return rval;
185	}
186
187	if (!xfs_dqlock_nowait(dqp))
188		return XFS_ITEM_LOCKED;
189
190	/*
191	 * Re-check the pincount now that we stabilized the value by
192	 * taking the quota lock.
193	 */
194	if (atomic_read(&dqp->q_pincount) > 0) {
195		rval = XFS_ITEM_PINNED;
196		goto out_unlock;
197	}
198
199	/*
200	 * Someone else is already flushing the dquot.  Nothing we can do
201	 * here but wait for the flush to finish and remove the item from
202	 * the AIL.
203	 */
204	if (!xfs_dqflock_nowait(dqp)) {
205		rval = XFS_ITEM_FLUSHING;
206		goto out_unlock;
207	}
208
209	spin_unlock(&lip->li_ailp->ail_lock);
210
211	error = xfs_qm_dqflush(dqp, &bp);
212	if (error) {
213		xfs_warn(dqp->q_mount, "%s: push error %d on dqp "PTR_FMT,
214			__func__, error, dqp);
215	} else {
 
 
 
 
 
 
 
 
216		if (!xfs_buf_delwri_queue(bp, buffer_list))
217			rval = XFS_ITEM_FLUSHING;
218		xfs_buf_relse(bp);
219	}
 
220
 
221	spin_lock(&lip->li_ailp->ail_lock);
222out_unlock:
223	xfs_dqunlock(dqp);
224	return rval;
225}
226
227/*
228 * Unlock the dquot associated with the log item.
229 * Clear the fields of the dquot and dquot log item that
230 * are specific to the current transaction.  If the
231 * hold flags is set, do not unlock the dquot.
232 */
233STATIC void
234xfs_qm_dquot_logitem_unlock(
235	struct xfs_log_item	*lip)
236{
237	struct xfs_dquot	*dqp = DQUOT_ITEM(lip)->qli_dquot;
238
239	ASSERT(XFS_DQ_IS_LOCKED(dqp));
240
241	/*
242	 * Clear the transaction pointer in the dquot
243	 */
244	dqp->q_transp = NULL;
245
246	/*
247	 * dquots are never 'held' from getting unlocked at the end of
248	 * a transaction.  Their locking and unlocking is hidden inside the
249	 * transaction layer, within trans_commit. Hence, no LI_HOLD flag
250	 * for the logitem.
251	 */
252	xfs_dqunlock(dqp);
253}
254
255/*
256 * this needs to stamp an lsn into the dquot, I think.
257 * rpc's that look at user dquot's would then have to
258 * push on the dependency recorded in the dquot
259 */
260STATIC void
261xfs_qm_dquot_logitem_committing(
262	struct xfs_log_item	*lip,
263	xfs_lsn_t		lsn)
264{
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
265}
266
267/*
268 * This is the ops vector for dquots
269 */
270static const struct xfs_item_ops xfs_dquot_item_ops = {
271	.iop_size	= xfs_qm_dquot_logitem_size,
 
272	.iop_format	= xfs_qm_dquot_logitem_format,
273	.iop_pin	= xfs_qm_dquot_logitem_pin,
274	.iop_unpin	= xfs_qm_dquot_logitem_unpin,
275	.iop_unlock	= xfs_qm_dquot_logitem_unlock,
276	.iop_committed	= xfs_qm_dquot_logitem_committed,
277	.iop_push	= xfs_qm_dquot_logitem_push,
278	.iop_committing = xfs_qm_dquot_logitem_committing,
279	.iop_error	= xfs_dquot_item_error
280};
281
282/*
283 * Initialize the dquot log item for a newly allocated dquot.
284 * The dquot isn't locked at this point, but it isn't on any of the lists
285 * either, so we don't care.
286 */
287void
288xfs_qm_dquot_logitem_init(
289	struct xfs_dquot	*dqp)
290{
291	struct xfs_dq_logitem	*lp = &dqp->q_logitem;
292
293	xfs_log_item_init(dqp->q_mount, &lp->qli_item, XFS_LI_DQUOT,
294					&xfs_dquot_item_ops);
 
295	lp->qli_dquot = dqp;
296}
297
298/*------------------  QUOTAOFF LOG ITEMS  -------------------*/
299
300static inline struct xfs_qoff_logitem *QOFF_ITEM(struct xfs_log_item *lip)
301{
302	return container_of(lip, struct xfs_qoff_logitem, qql_item);
303}
304
305
306/*
307 * This returns the number of iovecs needed to log the given quotaoff item.
308 * We only need 1 iovec for an quotaoff item.  It just logs the
309 * quotaoff_log_format structure.
310 */
311STATIC void
312xfs_qm_qoff_logitem_size(
313	struct xfs_log_item	*lip,
314	int			*nvecs,
315	int			*nbytes)
316{
317	*nvecs += 1;
318	*nbytes += sizeof(struct xfs_qoff_logitem);
319}
320
321STATIC void
322xfs_qm_qoff_logitem_format(
323	struct xfs_log_item	*lip,
324	struct xfs_log_vec	*lv)
325{
326	struct xfs_qoff_logitem	*qflip = QOFF_ITEM(lip);
327	struct xfs_log_iovec	*vecp = NULL;
328	struct xfs_qoff_logformat *qlf;
329
330	qlf = xlog_prepare_iovec(lv, &vecp, XLOG_REG_TYPE_QUOTAOFF);
331	qlf->qf_type = XFS_LI_QUOTAOFF;
332	qlf->qf_size = 1;
333	qlf->qf_flags = qflip->qql_flags;
334	xlog_finish_iovec(lv, vecp, sizeof(struct xfs_qoff_logitem));
335}
336
337/*
338 * Pinning has no meaning for an quotaoff item, so just return.
339 */
340STATIC void
341xfs_qm_qoff_logitem_pin(
342	struct xfs_log_item	*lip)
343{
344}
345
346/*
347 * Since pinning has no meaning for an quotaoff item, unpinning does
348 * not either.
349 */
350STATIC void
351xfs_qm_qoff_logitem_unpin(
352	struct xfs_log_item	*lip,
353	int			remove)
354{
355}
356
357/*
358 * There isn't much you can do to push a quotaoff item.  It is simply
359 * stuck waiting for the log to be flushed to disk.
360 */
361STATIC uint
362xfs_qm_qoff_logitem_push(
363	struct xfs_log_item	*lip,
364	struct list_head	*buffer_list)
365{
366	return XFS_ITEM_LOCKED;
367}
368
369/*
370 * Quotaoff items have no locking or pushing, so return failure
371 * so that the caller doesn't bother with us.
372 */
373STATIC void
374xfs_qm_qoff_logitem_unlock(
375	struct xfs_log_item	*lip)
376{
377}
378
379/*
380 * The quotaoff-start-item is logged only once and cannot be moved in the log,
381 * so simply return the lsn at which it's been logged.
382 */
383STATIC xfs_lsn_t
384xfs_qm_qoff_logitem_committed(
385	struct xfs_log_item	*lip,
386	xfs_lsn_t		lsn)
387{
388	return lsn;
389}
390
391STATIC xfs_lsn_t
392xfs_qm_qoffend_logitem_committed(
393	struct xfs_log_item	*lip,
394	xfs_lsn_t		lsn)
395{
396	struct xfs_qoff_logitem	*qfe = QOFF_ITEM(lip);
397	struct xfs_qoff_logitem	*qfs = qfe->qql_start_lip;
398	struct xfs_ail		*ailp = qfs->qql_item.li_ailp;
399
400	/*
401	 * Delete the qoff-start logitem from the AIL.
402	 * xfs_trans_ail_delete() drops the AIL lock.
403	 */
404	spin_lock(&ailp->ail_lock);
405	xfs_trans_ail_delete(ailp, &qfs->qql_item, SHUTDOWN_LOG_IO_ERROR);
406
407	kmem_free(qfs->qql_item.li_lv_shadow);
408	kmem_free(lip->li_lv_shadow);
409	kmem_free(qfs);
410	kmem_free(qfe);
411	return (xfs_lsn_t)-1;
412}
413
414/*
415 * XXX rcc - don't know quite what to do with this.  I think we can
416 * just ignore it.  The only time that isn't the case is if we allow
417 * the client to somehow see that quotas have been turned off in which
418 * we can't allow that to get back until the quotaoff hits the disk.
419 * So how would that happen?  Also, do we need different routines for
420 * quotaoff start and quotaoff end?  I suspect the answer is yes but
421 * to be sure, I need to look at the recovery code and see how quota off
422 * recovery is handled (do we roll forward or back or do something else).
423 * If we roll forwards or backwards, then we need two separate routines,
424 * one that does nothing and one that stamps in the lsn that matters
425 * (truly makes the quotaoff irrevocable).  If we do something else,
426 * then maybe we don't need two.
427 */
428STATIC void
429xfs_qm_qoff_logitem_committing(
430	struct xfs_log_item	*lip,
431	xfs_lsn_t		commit_lsn)
432{
433}
434
435static const struct xfs_item_ops xfs_qm_qoffend_logitem_ops = {
436	.iop_size	= xfs_qm_qoff_logitem_size,
437	.iop_format	= xfs_qm_qoff_logitem_format,
438	.iop_pin	= xfs_qm_qoff_logitem_pin,
439	.iop_unpin	= xfs_qm_qoff_logitem_unpin,
440	.iop_unlock	= xfs_qm_qoff_logitem_unlock,
441	.iop_committed	= xfs_qm_qoffend_logitem_committed,
442	.iop_push	= xfs_qm_qoff_logitem_push,
443	.iop_committing = xfs_qm_qoff_logitem_committing
444};
445
446/*
447 * This is the ops vector shared by all quotaoff-start log items.
448 */
449static const struct xfs_item_ops xfs_qm_qoff_logitem_ops = {
450	.iop_size	= xfs_qm_qoff_logitem_size,
451	.iop_format	= xfs_qm_qoff_logitem_format,
452	.iop_pin	= xfs_qm_qoff_logitem_pin,
453	.iop_unpin	= xfs_qm_qoff_logitem_unpin,
454	.iop_unlock	= xfs_qm_qoff_logitem_unlock,
455	.iop_committed	= xfs_qm_qoff_logitem_committed,
456	.iop_push	= xfs_qm_qoff_logitem_push,
457	.iop_committing = xfs_qm_qoff_logitem_committing
458};
459
460/*
461 * Allocate and initialize an quotaoff item of the correct quota type(s).
462 */
463struct xfs_qoff_logitem *
464xfs_qm_qoff_logitem_init(
465	struct xfs_mount	*mp,
466	struct xfs_qoff_logitem	*start,
467	uint			flags)
468{
469	struct xfs_qoff_logitem	*qf;
470
471	qf = kmem_zalloc(sizeof(struct xfs_qoff_logitem), KM_SLEEP);
472
473	xfs_log_item_init(mp, &qf->qql_item, XFS_LI_QUOTAOFF, start ?
474			&xfs_qm_qoffend_logitem_ops : &xfs_qm_qoff_logitem_ops);
475	qf->qql_item.li_mountp = mp;
476	qf->qql_start_lip = start;
477	qf->qql_flags = flags;
478	return qf;
479}
v6.13.7
  1// SPDX-License-Identifier: GPL-2.0
  2/*
  3 * Copyright (c) 2000-2003 Silicon Graphics, Inc.
  4 * All Rights Reserved.
 
 
 
 
 
 
 
 
 
 
 
 
 
  5 */
  6#include "xfs.h"
  7#include "xfs_fs.h"
  8#include "xfs_shared.h"
  9#include "xfs_format.h"
 10#include "xfs_log_format.h"
 11#include "xfs_trans_resv.h"
 12#include "xfs_mount.h"
 13#include "xfs_inode.h"
 14#include "xfs_quota.h"
 
 15#include "xfs_trans.h"
 16#include "xfs_buf_item.h"
 17#include "xfs_trans_priv.h"
 18#include "xfs_qm.h"
 19#include "xfs_log.h"
 20#include "xfs_error.h"
 21
 22static inline struct xfs_dq_logitem *DQUOT_ITEM(struct xfs_log_item *lip)
 23{
 24	return container_of(lip, struct xfs_dq_logitem, qli_item);
 25}
 26
 27/*
 28 * returns the number of iovecs needed to log the given dquot item.
 29 */
 30STATIC void
 31xfs_qm_dquot_logitem_size(
 32	struct xfs_log_item	*lip,
 33	int			*nvecs,
 34	int			*nbytes)
 35{
 36	*nvecs += 2;
 37	*nbytes += sizeof(struct xfs_dq_logformat) +
 38		   sizeof(struct xfs_disk_dquot);
 39}
 40
 41/*
 42 * fills in the vector of log iovecs for the given dquot log item.
 43 */
 44STATIC void
 45xfs_qm_dquot_logitem_format(
 46	struct xfs_log_item	*lip,
 47	struct xfs_log_vec	*lv)
 48{
 49	struct xfs_disk_dquot	ddq;
 50	struct xfs_dq_logitem	*qlip = DQUOT_ITEM(lip);
 51	struct xfs_log_iovec	*vecp = NULL;
 52	struct xfs_dq_logformat	*qlf;
 53
 54	qlf = xlog_prepare_iovec(lv, &vecp, XLOG_REG_TYPE_QFORMAT);
 55	qlf->qlf_type = XFS_LI_DQUOT;
 56	qlf->qlf_size = 2;
 57	qlf->qlf_id = qlip->qli_dquot->q_id;
 58	qlf->qlf_blkno = qlip->qli_dquot->q_blkno;
 59	qlf->qlf_len = 1;
 60	qlf->qlf_boffset = qlip->qli_dquot->q_bufoffset;
 61	xlog_finish_iovec(lv, vecp, sizeof(struct xfs_dq_logformat));
 62
 63	xfs_dquot_to_disk(&ddq, qlip->qli_dquot);
 64
 65	xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_DQUOT, &ddq,
 66			sizeof(struct xfs_disk_dquot));
 67}
 68
 69/*
 70 * Increment the pin count of the given dquot.
 71 */
 72STATIC void
 73xfs_qm_dquot_logitem_pin(
 74	struct xfs_log_item	*lip)
 75{
 76	struct xfs_dquot	*dqp = DQUOT_ITEM(lip)->qli_dquot;
 77
 78	ASSERT(XFS_DQ_IS_LOCKED(dqp));
 79	atomic_inc(&dqp->q_pincount);
 80}
 81
 82/*
 83 * Decrement the pin count of the given dquot, and wake up
 84 * anyone in xfs_dqwait_unpin() if the count goes to 0.	 The
 85 * dquot must have been previously pinned with a call to
 86 * xfs_qm_dquot_logitem_pin().
 87 */
 88STATIC void
 89xfs_qm_dquot_logitem_unpin(
 90	struct xfs_log_item	*lip,
 91	int			remove)
 92{
 93	struct xfs_dquot	*dqp = DQUOT_ITEM(lip)->qli_dquot;
 94
 95	ASSERT(atomic_read(&dqp->q_pincount) > 0);
 96	if (atomic_dec_and_test(&dqp->q_pincount))
 97		wake_up(&dqp->q_pinwait);
 98}
 99
 
 
 
 
 
 
 
 
 
 
 
 
100/*
101 * This is called to wait for the given dquot to be unpinned.
102 * Most of these pin/unpin routines are plagiarized from inode code.
103 */
104void
105xfs_qm_dqunpin_wait(
106	struct xfs_dquot	*dqp)
107{
108	ASSERT(XFS_DQ_IS_LOCKED(dqp));
109	if (atomic_read(&dqp->q_pincount) == 0)
110		return;
111
112	/*
113	 * Give the log a push so we don't wait here too long.
114	 */
115	xfs_log_force(dqp->q_mount, 0);
116	wait_event(dqp->q_pinwait, (atomic_read(&dqp->q_pincount) == 0));
117}
118
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
119STATIC uint
120xfs_qm_dquot_logitem_push(
121	struct xfs_log_item	*lip,
122	struct list_head	*buffer_list)
123		__releases(&lip->li_ailp->ail_lock)
124		__acquires(&lip->li_ailp->ail_lock)
125{
126	struct xfs_dq_logitem	*qlip = DQUOT_ITEM(lip);
127	struct xfs_dquot	*dqp = qlip->qli_dquot;
128	struct xfs_buf		*bp;
129	uint			rval = XFS_ITEM_SUCCESS;
130	int			error;
131
132	if (atomic_read(&dqp->q_pincount) > 0)
133		return XFS_ITEM_PINNED;
134
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
135	if (!xfs_dqlock_nowait(dqp))
136		return XFS_ITEM_LOCKED;
137
138	/*
139	 * Re-check the pincount now that we stabilized the value by
140	 * taking the quota lock.
141	 */
142	if (atomic_read(&dqp->q_pincount) > 0) {
143		rval = XFS_ITEM_PINNED;
144		goto out_unlock;
145	}
146
147	/*
148	 * Someone else is already flushing the dquot.  Nothing we can do
149	 * here but wait for the flush to finish and remove the item from
150	 * the AIL.
151	 */
152	if (!xfs_dqflock_nowait(dqp)) {
153		rval = XFS_ITEM_FLUSHING;
154		goto out_unlock;
155	}
156
157	spin_unlock(&lip->li_ailp->ail_lock);
158
159	error = xfs_dquot_use_attached_buf(dqp, &bp);
160	if (error == -EAGAIN) {
161		xfs_dqfunlock(dqp);
162		rval = XFS_ITEM_LOCKED;
163		goto out_relock_ail;
164	}
165
166	/*
167	 * dqflush completes dqflock on error, and the delwri ioend does it on
168	 * success.
169	 */
170	error = xfs_qm_dqflush(dqp, bp);
171	if (!error) {
172		if (!xfs_buf_delwri_queue(bp, buffer_list))
173			rval = XFS_ITEM_FLUSHING;
 
174	}
175	xfs_buf_relse(bp);
176
177out_relock_ail:
178	spin_lock(&lip->li_ailp->ail_lock);
179out_unlock:
180	xfs_dqunlock(dqp);
181	return rval;
182}
183
 
 
 
 
 
 
184STATIC void
185xfs_qm_dquot_logitem_release(
186	struct xfs_log_item	*lip)
187{
188	struct xfs_dquot	*dqp = DQUOT_ITEM(lip)->qli_dquot;
189
190	ASSERT(XFS_DQ_IS_LOCKED(dqp));
191
192	/*
 
 
 
 
 
193	 * dquots are never 'held' from getting unlocked at the end of
194	 * a transaction.  Their locking and unlocking is hidden inside the
195	 * transaction layer, within trans_commit. Hence, no LI_HOLD flag
196	 * for the logitem.
197	 */
198	xfs_dqunlock(dqp);
199}
200
 
 
 
 
 
201STATIC void
202xfs_qm_dquot_logitem_committing(
203	struct xfs_log_item	*lip,
204	xfs_csn_t		seq)
205{
206	return xfs_qm_dquot_logitem_release(lip);
207}
208
209#ifdef DEBUG_EXPENSIVE
210static void
211xfs_qm_dquot_logitem_precommit_check(
212	struct xfs_dquot	*dqp)
213{
214	struct xfs_mount	*mp = dqp->q_mount;
215	struct xfs_disk_dquot	ddq = { };
216	xfs_failaddr_t		fa;
217
218	xfs_dquot_to_disk(&ddq, dqp);
219	fa = xfs_dquot_verify(mp, &ddq, dqp->q_id);
220	if (fa) {
221		XFS_CORRUPTION_ERROR("Bad dquot during logging",
222				XFS_ERRLEVEL_LOW, mp, &ddq, sizeof(ddq));
223		xfs_alert(mp,
224 "Metadata corruption detected at %pS, dquot 0x%x",
225				fa, dqp->q_id);
226		xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE);
227		ASSERT(fa == NULL);
228	}
229}
230#else
231# define xfs_qm_dquot_logitem_precommit_check(...)	((void)0)
232#endif
233
234static int
235xfs_qm_dquot_logitem_precommit(
236	struct xfs_trans	*tp,
237	struct xfs_log_item	*lip)
238{
239	struct xfs_dq_logitem	*qlip = DQUOT_ITEM(lip);
240	struct xfs_dquot	*dqp = qlip->qli_dquot;
241
242	xfs_qm_dquot_logitem_precommit_check(dqp);
243
244	return xfs_dquot_attach_buf(tp, dqp);
245}
246
 
 
 
247static const struct xfs_item_ops xfs_dquot_item_ops = {
248	.iop_size	= xfs_qm_dquot_logitem_size,
249	.iop_precommit	= xfs_qm_dquot_logitem_precommit,
250	.iop_format	= xfs_qm_dquot_logitem_format,
251	.iop_pin	= xfs_qm_dquot_logitem_pin,
252	.iop_unpin	= xfs_qm_dquot_logitem_unpin,
253	.iop_release	= xfs_qm_dquot_logitem_release,
254	.iop_committing	= xfs_qm_dquot_logitem_committing,
255	.iop_push	= xfs_qm_dquot_logitem_push,
 
 
256};
257
258/*
259 * Initialize the dquot log item for a newly allocated dquot.
260 * The dquot isn't locked at this point, but it isn't on any of the lists
261 * either, so we don't care.
262 */
263void
264xfs_qm_dquot_logitem_init(
265	struct xfs_dquot	*dqp)
266{
267	struct xfs_dq_logitem	*lp = &dqp->q_logitem;
268
269	xfs_log_item_init(dqp->q_mount, &lp->qli_item, XFS_LI_DQUOT,
270					&xfs_dquot_item_ops);
271	spin_lock_init(&lp->qli_lock);
272	lp->qli_dquot = dqp;
273	lp->qli_dirty = false;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
274}