[linux.git] / fs / xfs / xfs_dquot_item.c

// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (c) 2000-2003 Silicon Graphics, Inc.
 * All Rights Reserved.
 */
#include "xfs.h"
#include "xfs_fs.h"
#include "xfs_shared.h"
#include "xfs_format.h"
#include "xfs_log_format.h"
#include "xfs_trans_resv.h"
#include "xfs_mount.h"
#include "xfs_inode.h"
#include "xfs_quota.h"
#include "xfs_trans.h"
#include "xfs_buf_item.h"
#include "xfs_trans_priv.h"
#include "xfs_qm.h"
#include "xfs_log.h"

static inline struct xfs_dq_logitem *DQUOT_ITEM(struct xfs_log_item *lip)
{
	return container_of(lip, struct xfs_dq_logitem, qli_item);
}

/*
 * returns the number of iovecs needed to log the given dquot item.
 */
STATIC void
xfs_qm_dquot_logitem_size(
	struct xfs_log_item	*lip,
	int			*nvecs,
	int			*nbytes)
{
	*nvecs += 2;
	*nbytes += sizeof(struct xfs_dq_logformat) +
		   sizeof(struct xfs_disk_dquot);
}

/*
 * fills in the vector of log iovecs for the given dquot log item.
 */
STATIC void
xfs_qm_dquot_logitem_format(
	struct xfs_log_item	*lip,
	struct xfs_log_vec	*lv)
{
	struct xfs_dq_logitem	*qlip = DQUOT_ITEM(lip);
	struct xfs_log_iovec	*vecp = NULL;
	struct xfs_dq_logformat	*qlf;

	qlf = xlog_prepare_iovec(lv, &vecp, XLOG_REG_TYPE_QFORMAT);
	qlf->qlf_type = XFS_LI_DQUOT;
	qlf->qlf_size = 2;
	qlf->qlf_id = be32_to_cpu(qlip->qli_dquot->q_core.d_id);
	qlf->qlf_blkno = qlip->qli_dquot->q_blkno;
	qlf->qlf_len = 1;
	qlf->qlf_boffset = qlip->qli_dquot->q_bufoffset;
	xlog_finish_iovec(lv, vecp, sizeof(struct xfs_dq_logformat));

	xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_DQUOT,
			&qlip->qli_dquot->q_core,
			sizeof(struct xfs_disk_dquot));
}

/*
 * Increment the pin count of the given dquot.
 */
STATIC void
xfs_qm_dquot_logitem_pin(
	struct xfs_log_item	*lip)
{
	struct xfs_dquot	*dqp = DQUOT_ITEM(lip)->qli_dquot;

	ASSERT(XFS_DQ_IS_LOCKED(dqp));
	atomic_inc(&dqp->q_pincount);
}

/*
 * Decrement the pin count of the given dquot, and wake up
 * anyone in xfs_dqwait_unpin() if the count goes to 0.	 The
 * dquot must have been previously pinned with a call to
 * xfs_qm_dquot_logitem_pin().
 */
STATIC void
xfs_qm_dquot_logitem_unpin(
	struct xfs_log_item	*lip,
	int			remove)
{
	struct xfs_dquot	*dqp = DQUOT_ITEM(lip)->qli_dquot;

	ASSERT(atomic_read(&dqp->q_pincount) > 0);
	if (atomic_dec_and_test(&dqp->q_pincount))
		wake_up(&dqp->q_pinwait);
}

/*
 * This is called to wait for the given dquot to be unpinned.
 * Most of these pin/unpin routines are plagiarized from inode code.
 */
void
xfs_qm_dqunpin_wait(
	struct xfs_dquot	*dqp)
{
	ASSERT(XFS_DQ_IS_LOCKED(dqp));
	if (atomic_read(&dqp->q_pincount) == 0)
		return;

	/*
	 * Give the log a push so we don't wait here too long.
	 */
	xfs_log_force(dqp->q_mount, 0);
	wait_event(dqp->q_pinwait, (atomic_read(&dqp->q_pincount) == 0));
}

/*
 * Callback used to mark a buffer with XFS_LI_FAILED when items in the buffer
 * have been failed during writeback
 *
 * this informs the AIL that the dquot is already flush locked on the next push,
 * and acquires a hold on the buffer to ensure that it isn't reclaimed before
 * dirty data makes it to disk.
 */
STATIC void
xfs_dquot_item_error(
	struct xfs_log_item	*lip,
	struct xfs_buf		*bp)
{
	ASSERT(!completion_done(&DQUOT_ITEM(lip)->qli_dquot->q_flush));
	xfs_set_li_failed(lip, bp);
}

STATIC uint
xfs_qm_dquot_logitem_push(
	struct xfs_log_item	*lip,
	struct list_head	*buffer_list)
		__releases(&lip->li_ailp->ail_lock)
		__acquires(&lip->li_ailp->ail_lock)
{
	struct xfs_dquot	*dqp = DQUOT_ITEM(lip)->qli_dquot;
	struct xfs_buf		*bp = lip->li_buf;
	uint			rval = XFS_ITEM_SUCCESS;
	int			error;

	if (atomic_read(&dqp->q_pincount) > 0)
		return XFS_ITEM_PINNED;

	/*
	 * The buffer containing this item failed to be written back
	 * previously. Resubmit the buffer for IO
	 */
	if (test_bit(XFS_LI_FAILED, &lip->li_flags)) {
		if (!xfs_buf_trylock(bp))
			return XFS_ITEM_LOCKED;

		if (!xfs_buf_resubmit_failed_buffers(bp, buffer_list))
			rval = XFS_ITEM_FLUSHING;

		xfs_buf_unlock(bp);
		return rval;
	}

	if (!xfs_dqlock_nowait(dqp))
		return XFS_ITEM_LOCKED;

	/*
	 * Re-check the pincount now that we stabilized the value by
	 * taking the quota lock.
	 */
	if (atomic_read(&dqp->q_pincount) > 0) {
		rval = XFS_ITEM_PINNED;
		goto out_unlock;
	}

	/*
	 * Someone else is already flushing the dquot.  Nothing we can do
	 * here but wait for the flush to finish and remove the item from
	 * the AIL.
	 */
	if (!xfs_dqflock_nowait(dqp)) {
		rval = XFS_ITEM_FLUSHING;
		goto out_unlock;
	}

	spin_unlock(&lip->li_ailp->ail_lock);

	error = xfs_qm_dqflush(dqp, &bp);
	if (!error) {
		if (!xfs_buf_delwri_queue(bp, buffer_list))
			rval = XFS_ITEM_FLUSHING;
		xfs_buf_relse(bp);
	}

	spin_lock(&lip->li_ailp->ail_lock);
out_unlock:
	xfs_dqunlock(dqp);
	return rval;
}

STATIC void
xfs_qm_dquot_logitem_release(
	struct xfs_log_item	*lip)
{
	struct xfs_dquot	*dqp = DQUOT_ITEM(lip)->qli_dquot;

	ASSERT(XFS_DQ_IS_LOCKED(dqp));

	/*
	 * dquots are never 'held' from getting unlocked at the end of
	 * a transaction.  Their locking and unlocking is hidden inside the
	 * transaction layer, within trans_commit. Hence, no LI_HOLD flag
	 * for the logitem.
	 */
	xfs_dqunlock(dqp);
}

STATIC void
xfs_qm_dquot_logitem_committing(
	struct xfs_log_item	*lip,
	xfs_lsn_t		commit_lsn)
{
	return xfs_qm_dquot_logitem_release(lip);
}

static const struct xfs_item_ops xfs_dquot_item_ops = {
	.iop_size	= xfs_qm_dquot_logitem_size,
	.iop_format	= xfs_qm_dquot_logitem_format,
	.iop_pin	= xfs_qm_dquot_logitem_pin,
	.iop_unpin	= xfs_qm_dquot_logitem_unpin,
	.iop_release	= xfs_qm_dquot_logitem_release,
	.iop_committing	= xfs_qm_dquot_logitem_committing,
	.iop_push	= xfs_qm_dquot_logitem_push,
	.iop_error	= xfs_dquot_item_error
};

/*
 * Initialize the dquot log item for a newly allocated dquot.
 * The dquot isn't locked at this point, but it isn't on any of the lists
 * either, so we don't care.
 */
void
xfs_qm_dquot_logitem_init(
	struct xfs_dquot	*dqp)
{
	struct xfs_dq_logitem	*lp = &dqp->q_logitem;

	xfs_log_item_init(dqp->q_mount, &lp->qli_item, XFS_LI_DQUOT,
					&xfs_dquot_item_ops);
	lp->qli_dquot = dqp;
}

/*------------------  QUOTAOFF LOG ITEMS  -------------------*/

static inline struct xfs_qoff_logitem *QOFF_ITEM(struct xfs_log_item *lip)
{
	return container_of(lip, struct xfs_qoff_logitem, qql_item);
}


/*
 * This returns the number of iovecs needed to log the given quotaoff item.
 * We only need 1 iovec for an quotaoff item.  It just logs the
 * quotaoff_log_format structure.
 */
STATIC void
xfs_qm_qoff_logitem_size(
	struct xfs_log_item	*lip,
	int			*nvecs,
	int			*nbytes)
{
	*nvecs += 1;
	*nbytes += sizeof(struct xfs_qoff_logitem);
}

STATIC void
xfs_qm_qoff_logitem_format(
	struct xfs_log_item	*lip,
	struct xfs_log_vec	*lv)
{
	struct xfs_qoff_logitem	*qflip = QOFF_ITEM(lip);
	struct xfs_log_iovec	*vecp = NULL;
	struct xfs_qoff_logformat *qlf;

	qlf = xlog_prepare_iovec(lv, &vecp, XLOG_REG_TYPE_QUOTAOFF);
	qlf->qf_type = XFS_LI_QUOTAOFF;
	qlf->qf_size = 1;
	qlf->qf_flags = qflip->qql_flags;
	xlog_finish_iovec(lv, vecp, sizeof(struct xfs_qoff_logitem));
}

/*
 * There isn't much you can do to push a quotaoff item.  It is simply
 * stuck waiting for the log to be flushed to disk.
 */
STATIC uint
xfs_qm_qoff_logitem_push(
	struct xfs_log_item	*lip,
	struct list_head	*buffer_list)
{
	return XFS_ITEM_LOCKED;
}

STATIC xfs_lsn_t
xfs_qm_qoffend_logitem_committed(
	struct xfs_log_item	*lip,
	xfs_lsn_t		lsn)
{
	struct xfs_qoff_logitem	*qfe = QOFF_ITEM(lip);
	struct xfs_qoff_logitem	*qfs = qfe->qql_start_lip;
	struct xfs_ail		*ailp = qfs->qql_item.li_ailp;

	/*
	 * Delete the qoff-start logitem from the AIL.
	 * xfs_trans_ail_delete() drops the AIL lock.
	 */
	spin_lock(&ailp->ail_lock);
	xfs_trans_ail_delete(ailp, &qfs->qql_item, SHUTDOWN_LOG_IO_ERROR);

	kmem_free(qfs->qql_item.li_lv_shadow);
	kmem_free(lip->li_lv_shadow);
	kmem_free(qfs);
	kmem_free(qfe);
	return (xfs_lsn_t)-1;
}

static const struct xfs_item_ops xfs_qm_qoffend_logitem_ops = {
	.iop_size	= xfs_qm_qoff_logitem_size,
	.iop_format	= xfs_qm_qoff_logitem_format,
	.iop_committed	= xfs_qm_qoffend_logitem_committed,
	.iop_push	= xfs_qm_qoff_logitem_push,
};

static const struct xfs_item_ops xfs_qm_qoff_logitem_ops = {
	.iop_size	= xfs_qm_qoff_logitem_size,
	.iop_format	= xfs_qm_qoff_logitem_format,
	.iop_push	= xfs_qm_qoff_logitem_push,
};

/*
 * Allocate and initialize an quotaoff item of the correct quota type(s).
 */
struct xfs_qoff_logitem *
xfs_qm_qoff_logitem_init(
	struct xfs_mount	*mp,
	struct xfs_qoff_logitem	*start,
	uint			flags)
{
	struct xfs_qoff_logitem	*qf;

	qf = kmem_zalloc(sizeof(struct xfs_qoff_logitem), KM_SLEEP);

	xfs_log_item_init(mp, &qf->qql_item, XFS_LI_QUOTAOFF, start ?
			&xfs_qm_qoffend_logitem_ops : &xfs_qm_qoff_logitem_ops);
	qf->qql_item.li_mountp = mp;
	qf->qql_start_lip = start;
	qf->qql_flags = flags;
	return qf;
}
Commit	Line	Data
0b61f8a4	1	// SPDX-License-Identifier: GPL-2.0
1da177e4	2	/*
4ce3121f NS	3	* Copyright (c) 2000-2003 Silicon Graphics, Inc.
4ce3121f NS	4	* All Rights Reserved.
1da177e4	5	*/
1da177e4 LT	6	#include "xfs.h"
1da177e4 LT	7	#include "xfs_fs.h"
5467b34b	8	#include "xfs_shared.h"
6ca1c906	9	#include "xfs_format.h"
239880ef DC	10	#include "xfs_log_format.h"
239880ef DC	11	#include "xfs_trans_resv.h"
1da177e4	12	#include "xfs_mount.h"
1da177e4	13	#include "xfs_inode.h"
a4fbe6ab	14	#include "xfs_quota.h"
239880ef	15	#include "xfs_trans.h"
1da177e4 LT	16	#include "xfs_buf_item.h"
1da177e4 LT	17	#include "xfs_trans_priv.h"
1da177e4	18	#include "xfs_qm.h"
239880ef	19	#include "xfs_log.h"
1da177e4	20
7bfa31d8 CH	21	static inline struct xfs_dq_logitem DQUOT_ITEM(struct xfs_log_item lip)
	22	{
	23	return container_of(lip, struct xfs_dq_logitem, qli_item);
	24	}
	25
1da177e4 LT	26	/*
	27	* returns the number of iovecs needed to log the given dquot item.
	28	*/
166d1368	29	STATIC void
1da177e4	30	xfs_qm_dquot_logitem_size(
166d1368 DC	31	struct xfs_log_item *lip,
	32	int *nvecs,
	33	int *nbytes)
1da177e4	34	{
166d1368 DC	35	*nvecs += 2;
	36	*nbytes += sizeof(struct xfs_dq_logformat) +
	37	sizeof(struct xfs_disk_dquot);
1da177e4 LT	38	}
	39
	40	/*
	41	* fills in the vector of log iovecs for the given dquot log item.
	42	*/
	43	STATIC void
	44	xfs_qm_dquot_logitem_format(
7bfa31d8	45	struct xfs_log_item *lip,
bde7cff6	46	struct xfs_log_vec *lv)
1da177e4	47	{
7bfa31d8	48	struct xfs_dq_logitem *qlip = DQUOT_ITEM(lip);
bde7cff6	49	struct xfs_log_iovec *vecp = NULL;
ce8e9629	50	struct xfs_dq_logformat *qlf;
1da177e4	51
ce8e9629 CH	52	qlf = xlog_prepare_iovec(lv, &vecp, XLOG_REG_TYPE_QFORMAT);
	53	qlf->qlf_type = XFS_LI_DQUOT;
	54	qlf->qlf_size = 2;
	55	qlf->qlf_id = be32_to_cpu(qlip->qli_dquot->q_core.d_id);
	56	qlf->qlf_blkno = qlip->qli_dquot->q_blkno;
	57	qlf->qlf_len = 1;
	58	qlf->qlf_boffset = qlip->qli_dquot->q_bufoffset;
	59	xlog_finish_iovec(lv, vecp, sizeof(struct xfs_dq_logformat));
bde7cff6	60
bde7cff6	61	xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_DQUOT,
1234351c CH	62	&qlip->qli_dquot->q_core,
1234351c CH	63	sizeof(struct xfs_disk_dquot));
1da177e4 LT	64	}
	65
	66	/*
	67	* Increment the pin count of the given dquot.
1da177e4 LT	68	*/
	69	STATIC void
	70	xfs_qm_dquot_logitem_pin(
7bfa31d8	71	struct xfs_log_item *lip)
1da177e4	72	{
7bfa31d8	73	struct xfs_dquot *dqp = DQUOT_ITEM(lip)->qli_dquot;
1da177e4	74
1da177e4	75	ASSERT(XFS_DQ_IS_LOCKED(dqp));
d1de8021	76	atomic_inc(&dqp->q_pincount);
1da177e4 LT	77	}
	78
	79	/*
	80	* Decrement the pin count of the given dquot, and wake up
	81	* anyone in xfs_dqwait_unpin() if the count goes to 0. The
bc3048e3 PL	82	* dquot must have been previously pinned with a call to
bc3048e3 PL	83	* xfs_qm_dquot_logitem_pin().
1da177e4	84	*/
1da177e4 LT	85	STATIC void
1da177e4 LT	86	xfs_qm_dquot_logitem_unpin(
7bfa31d8	87	struct xfs_log_item *lip,
9412e318	88	int remove)
1da177e4	89	{
7bfa31d8	90	struct xfs_dquot *dqp = DQUOT_ITEM(lip)->qli_dquot;
1da177e4	91
bc3048e3 PL	92	ASSERT(atomic_read(&dqp->q_pincount) > 0);
	93	if (atomic_dec_and_test(&dqp->q_pincount))
	94	wake_up(&dqp->q_pinwait);
1da177e4 LT	95	}
1da177e4 LT	96
1da177e4 LT	97	/*
	98	* This is called to wait for the given dquot to be unpinned.
	99	* Most of these pin/unpin routines are plagiarized from inode code.
	100	*/
	101	void
	102	xfs_qm_dqunpin_wait(
7bfa31d8	103	struct xfs_dquot *dqp)
1da177e4	104	{
1da177e4	105	ASSERT(XFS_DQ_IS_LOCKED(dqp));
bc3048e3	106	if (atomic_read(&dqp->q_pincount) == 0)
1da177e4	107	return;
1da177e4 LT	108
	109	/*
	110	* Give the log a push so we don't wait here too long.
	111	*/
a14a348b	112	xfs_log_force(dqp->q_mount, 0);
bc3048e3	113	wait_event(dqp->q_pinwait, (atomic_read(&dqp->q_pincount) == 0));
1da177e4 LT	114	}
1da177e4 LT	115
373b0589 CM	116	/*
	117	* Callback used to mark a buffer with XFS_LI_FAILED when items in the buffer
	118	* have been failed during writeback
	119	*
	120	* this informs the AIL that the dquot is already flush locked on the next push,
	121	* and acquires a hold on the buffer to ensure that it isn't reclaimed before
	122	* dirty data makes it to disk.
	123	*/
	124	STATIC void
	125	xfs_dquot_item_error(
	126	struct xfs_log_item *lip,
	127	struct xfs_buf *bp)
	128	{
75d4a13b	129	ASSERT(!completion_done(&DQUOT_ITEM(lip)->qli_dquot->q_flush));
373b0589 CM	130	xfs_set_li_failed(lip, bp);
	131	}
	132
1da177e4	133	STATIC uint
43ff2122 CH	134	xfs_qm_dquot_logitem_push(
43ff2122 CH	135	struct xfs_log_item *lip,
57e80956 MW	136	struct list_head *buffer_list)
	137	__releases(&lip->li_ailp->ail_lock)
	138	__acquires(&lip->li_ailp->ail_lock)
1da177e4	139	{
7bfa31d8	140	struct xfs_dquot *dqp = DQUOT_ITEM(lip)->qli_dquot;
373b0589	141	struct xfs_buf *bp = lip->li_buf;
43ff2122 CH	142	uint rval = XFS_ITEM_SUCCESS;
43ff2122 CH	143	int error;
1da177e4	144
bc3048e3	145	if (atomic_read(&dqp->q_pincount) > 0)
d808f617	146	return XFS_ITEM_PINNED;
1da177e4	147
373b0589 CM	148	/*
	149	* The buffer containing this item failed to be written back
	150	* previously. Resubmit the buffer for IO
	151	*/
22525c17	152	if (test_bit(XFS_LI_FAILED, &lip->li_flags)) {
373b0589 CM	153	if (!xfs_buf_trylock(bp))
	154	return XFS_ITEM_LOCKED;
	155
643c8c05	156	if (!xfs_buf_resubmit_failed_buffers(bp, buffer_list))
373b0589 CM	157	rval = XFS_ITEM_FLUSHING;
	158
	159	xfs_buf_unlock(bp);
	160	return rval;
	161	}
	162
800b484e	163	if (!xfs_dqlock_nowait(dqp))
d808f617	164	return XFS_ITEM_LOCKED;
1da177e4	165
fe7257fd CH	166	/*
	167	* Re-check the pincount now that we stabilized the value by
	168	* taking the quota lock.
	169	*/
	170	if (atomic_read(&dqp->q_pincount) > 0) {
43ff2122 CH	171	rval = XFS_ITEM_PINNED;
43ff2122 CH	172	goto out_unlock;
fe7257fd CH	173	}
fe7257fd CH	174
43ff2122 CH	175	/*
	176	* Someone else is already flushing the dquot. Nothing we can do
	177	* here but wait for the flush to finish and remove the item from
	178	* the AIL.
	179	*/
e1f49cf2	180	if (!xfs_dqflock_nowait(dqp)) {
43ff2122 CH	181	rval = XFS_ITEM_FLUSHING;
	182	goto out_unlock;
	183	}
	184
57e80956	185	spin_unlock(&lip->li_ailp->ail_lock);
43ff2122 CH	186
43ff2122 CH	187	error = xfs_qm_dqflush(dqp, &bp);
609001bc	188	if (!error) {
43ff2122 CH	189	if (!xfs_buf_delwri_queue(bp, buffer_list))
	190	rval = XFS_ITEM_FLUSHING;
	191	xfs_buf_relse(bp);
1da177e4 LT	192	}
1da177e4 LT	193
57e80956	194	spin_lock(&lip->li_ailp->ail_lock);
43ff2122 CH	195	out_unlock:
	196	xfs_dqunlock(dqp);
	197	return rval;
1da177e4 LT	198	}
1da177e4 LT	199
1da177e4	200	STATIC void
ddf92053	201	xfs_qm_dquot_logitem_release(
7bfa31d8	202	struct xfs_log_item *lip)
1da177e4	203	{
7bfa31d8	204	struct xfs_dquot *dqp = DQUOT_ITEM(lip)->qli_dquot;
1da177e4	205
1da177e4 LT	206	ASSERT(XFS_DQ_IS_LOCKED(dqp));
1da177e4 LT	207
1da177e4 LT	208	/*
	209	* dquots are never 'held' from getting unlocked at the end of
	210	* a transaction. Their locking and unlocking is hidden inside the
	211	* transaction layer, within trans_commit. Hence, no LI_HOLD flag
	212	* for the logitem.
	213	*/
	214	xfs_dqunlock(dqp);
	215	}
	216
ddf92053 CH	217	STATIC void
	218	xfs_qm_dquot_logitem_committing(
	219	struct xfs_log_item *lip,
	220	xfs_lsn_t commit_lsn)
	221	{
	222	return xfs_qm_dquot_logitem_release(lip);
	223	}
	224
272e42b2	225	static const struct xfs_item_ops xfs_dquot_item_ops = {
7bfa31d8 CH	226	.iop_size = xfs_qm_dquot_logitem_size,
	227	.iop_format = xfs_qm_dquot_logitem_format,
	228	.iop_pin = xfs_qm_dquot_logitem_pin,
	229	.iop_unpin = xfs_qm_dquot_logitem_unpin,
ddf92053 CH	230	.iop_release = xfs_qm_dquot_logitem_release,
ddf92053 CH	231	.iop_committing = xfs_qm_dquot_logitem_committing,
7bfa31d8	232	.iop_push = xfs_qm_dquot_logitem_push,
373b0589	233	.iop_error = xfs_dquot_item_error
1da177e4 LT	234	};
	235
	236	/*
	237	* Initialize the dquot log item for a newly allocated dquot.
	238	* The dquot isn't locked at this point, but it isn't on any of the lists
	239	* either, so we don't care.
	240	*/
	241	void
	242	xfs_qm_dquot_logitem_init(
7bfa31d8	243	struct xfs_dquot *dqp)
1da177e4	244	{
7bfa31d8	245	struct xfs_dq_logitem *lp = &dqp->q_logitem;
1da177e4	246
43f5efc5 DC	247	xfs_log_item_init(dqp->q_mount, &lp->qli_item, XFS_LI_DQUOT,
43f5efc5 DC	248	&xfs_dquot_item_ops);
1da177e4	249	lp->qli_dquot = dqp;
1da177e4 LT	250	}
	251
	252	/------------------ QUOTAOFF LOG ITEMS -------------------/
	253
7bfa31d8 CH	254	static inline struct xfs_qoff_logitem QOFF_ITEM(struct xfs_log_item lip)
	255	{
	256	return container_of(lip, struct xfs_qoff_logitem, qql_item);
	257	}
	258
	259
1da177e4 LT	260	/*
	261	* This returns the number of iovecs needed to log the given quotaoff item.
	262	* We only need 1 iovec for an quotaoff item. It just logs the
	263	* quotaoff_log_format structure.
	264	*/
166d1368	265	STATIC void
7bfa31d8	266	xfs_qm_qoff_logitem_size(
166d1368 DC	267	struct xfs_log_item *lip,
	268	int *nvecs,
	269	int *nbytes)
1da177e4	270	{
166d1368 DC	271	*nvecs += 1;
166d1368 DC	272	*nbytes += sizeof(struct xfs_qoff_logitem);
1da177e4 LT	273	}
1da177e4 LT	274
1da177e4	275	STATIC void
7bfa31d8 CH	276	xfs_qm_qoff_logitem_format(
7bfa31d8 CH	277	struct xfs_log_item *lip,
bde7cff6	278	struct xfs_log_vec *lv)
1da177e4	279	{
7bfa31d8	280	struct xfs_qoff_logitem *qflip = QOFF_ITEM(lip);
bde7cff6	281	struct xfs_log_iovec *vecp = NULL;
ffda4e83	282	struct xfs_qoff_logformat *qlf;
1da177e4	283
ffda4e83 CH	284	qlf = xlog_prepare_iovec(lv, &vecp, XLOG_REG_TYPE_QUOTAOFF);
	285	qlf->qf_type = XFS_LI_QUOTAOFF;
	286	qlf->qf_size = 1;
	287	qlf->qf_flags = qflip->qql_flags;
	288	xlog_finish_iovec(lv, vecp, sizeof(struct xfs_qoff_logitem));
1da177e4 LT	289	}
1da177e4 LT	290
1da177e4	291	/*
43ff2122 CH	292	* There isn't much you can do to push a quotaoff item. It is simply
43ff2122 CH	293	* stuck waiting for the log to be flushed to disk.
1da177e4	294	*/
1da177e4	295	STATIC uint
43ff2122 CH	296	xfs_qm_qoff_logitem_push(
	297	struct xfs_log_item *lip,
	298	struct list_head *buffer_list)
1da177e4 LT	299	{
	300	return XFS_ITEM_LOCKED;
	301	}
	302
1da177e4 LT	303	STATIC xfs_lsn_t
1da177e4 LT	304	xfs_qm_qoffend_logitem_committed(
7bfa31d8 CH	305	struct xfs_log_item *lip,
7bfa31d8 CH	306	xfs_lsn_t lsn)
1da177e4	307	{
7bfa31d8 CH	308	struct xfs_qoff_logitem *qfe = QOFF_ITEM(lip);
	309	struct xfs_qoff_logitem *qfs = qfe->qql_start_lip;
	310	struct xfs_ail *ailp = qfs->qql_item.li_ailp;
1da177e4	311
1da177e4 LT	312	/*
1da177e4 LT	313	* Delete the qoff-start logitem from the AIL.
783a2f65	314	* xfs_trans_ail_delete() drops the AIL lock.
1da177e4	315	*/
57e80956	316	spin_lock(&ailp->ail_lock);
04913fdd	317	xfs_trans_ail_delete(ailp, &qfs->qql_item, SHUTDOWN_LOG_IO_ERROR);
7bfa31d8	318
b1c5ebb2 DC	319	kmem_free(qfs->qql_item.li_lv_shadow);
b1c5ebb2 DC	320	kmem_free(lip->li_lv_shadow);
f0e2d93c DV	321	kmem_free(qfs);
f0e2d93c DV	322	kmem_free(qfe);
1da177e4 LT	323	return (xfs_lsn_t)-1;
	324	}
	325
272e42b2	326	static const struct xfs_item_ops xfs_qm_qoffend_logitem_ops = {
7bfa31d8 CH	327	.iop_size = xfs_qm_qoff_logitem_size,
7bfa31d8 CH	328	.iop_format = xfs_qm_qoff_logitem_format,
7bfa31d8 CH	329	.iop_committed = xfs_qm_qoffend_logitem_committed,
7bfa31d8 CH	330	.iop_push = xfs_qm_qoff_logitem_push,
1da177e4 LT	331	};
1da177e4 LT	332
272e42b2	333	static const struct xfs_item_ops xfs_qm_qoff_logitem_ops = {
7bfa31d8 CH	334	.iop_size = xfs_qm_qoff_logitem_size,
7bfa31d8 CH	335	.iop_format = xfs_qm_qoff_logitem_format,
7bfa31d8	336	.iop_push = xfs_qm_qoff_logitem_push,
1da177e4 LT	337	};
	338
	339	/*
	340	* Allocate and initialize an quotaoff item of the correct quota type(s).
	341	*/
7bfa31d8	342	struct xfs_qoff_logitem *
1da177e4	343	xfs_qm_qoff_logitem_init(
7bfa31d8 CH	344	struct xfs_mount *mp,
	345	struct xfs_qoff_logitem *start,
	346	uint flags)
1da177e4	347	{
7bfa31d8	348	struct xfs_qoff_logitem *qf;
1da177e4	349
7bfa31d8	350	qf = kmem_zalloc(sizeof(struct xfs_qoff_logitem), KM_SLEEP);
1da177e4	351
43f5efc5 DC	352	xfs_log_item_init(mp, &qf->qql_item, XFS_LI_QUOTAOFF, start ?
43f5efc5 DC	353	&xfs_qm_qoffend_logitem_ops : &xfs_qm_qoff_logitem_ops);
1da177e4	354	qf->qql_item.li_mountp = mp;
1da177e4	355	qf->qql_start_lip = start;
ffda4e83	356	qf->qql_flags = flags;
7bfa31d8	357	return qf;
1da177e4	358	}