/*
 * This is called by the efd item code below to release references to
 * the given efi item.  Each efd calls this with the number of
 * extents that it has logged, and when the sum of these reaches
 * the total number of extents logged by this efi item we can free
 * the efi item.
 *
 * Freeing the efi item requires that we remove it from the AIL.
 * We'll use the AIL lock to protect our counters as well as
 * the removal from the AIL.
 */
void
xfs_efi_release(xfs_efi_log_item_t	*efip,
		uint			nextents)
{
	xfs_mount_t	*mp;
	int		extents_left;
	SPLDECL(s);

	mp = efip->efi_item.li_mountp;
	ASSERT(efip->efi_next_extent > 0);
	ASSERT(efip->efi_flags & XFS_EFI_COMMITTED);

	AIL_LOCK(mp, s);
	ASSERT(efip->efi_next_extent >= nextents);
	efip->efi_next_extent -= nextents;
	extents_left = efip->efi_next_extent;
	if (extents_left == 0) {
		/*
		 * xfs_trans_delete_ail() drops the AIL lock.
		 */
		xfs_trans_delete_ail(mp, (xfs_log_item_t *)efip, s);
		xfs_efi_item_free(efip);
	} else {
		AIL_UNLOCK(mp, s);
	}
}
/*
 * This is called when the transaction that should be committing the
 * EFD corresponding to the given EFI is aborted.  The committed and
 * canceled flags are used to coordinate the freeing of the EFI and
 * the references by the transaction that committed it.
 */
STATIC void
xfs_efi_cancel(
	xfs_efi_log_item_t	*efip)
{
	int		nexts;
	int		size;
	xfs_mount_t	*mp;
	SPLDECL(s);

	mp = efip->efi_item.li_mountp;
	AIL_LOCK(mp, s);
	if (efip->efi_flags & XFS_EFI_COMMITTED) {
		/*
		 * xfs_trans_delete_ail() drops the AIL lock.
		 */
		xfs_trans_delete_ail(mp, (xfs_log_item_t *)efip, s);

		nexts = efip->efi_format.efi_nextents;
		if (nexts > XFS_EFI_MAX_FAST_EXTENTS) {
			size = sizeof(xfs_efi_log_item_t);
			size += (nexts - 1) * sizeof(xfs_extent_t);
			kmem_free(efip, size);
		} else {
			kmem_zone_free(xfs_efi_zone, efip);
		}
	} else {
		efip->efi_flags |= XFS_EFI_CANCELED;
		AIL_UNLOCK(mp, s);
	}

	return;
}
/*
 * like unpin only we have to also clear the xaction descriptor
 * pointing the log item if we free the item.  This routine duplicates
 * unpin because efi_flags is protected by the AIL lock.  Freeing
 * the descriptor and then calling unpin would force us to drop the AIL
 * lock which would open up a race condition.
 */
STATIC void
xfs_efi_item_unpin_remove(xfs_efi_log_item_t *efip, xfs_trans_t *tp)
{
	xfs_mount_t	*mp;
	xfs_log_item_desc_t	*lidp;
	SPLDECL(s);

	mp = efip->efi_item.li_mountp;
	AIL_LOCK(mp, s);
	if (efip->efi_flags & XFS_EFI_CANCELED) {
		/*
		 * free the xaction descriptor pointing to this item
		 */
		lidp = xfs_trans_find_item(tp, (xfs_log_item_t *) efip);
		xfs_trans_free_item(tp, lidp);
		/*
		 * pull the item off the AIL.
		 * xfs_trans_delete_ail() drops the AIL lock.
		 */
		xfs_trans_delete_ail(mp, (xfs_log_item_t *)efip, s);
		xfs_efi_item_free(efip);
	} else {
		efip->efi_flags |= XFS_EFI_COMMITTED;
		AIL_UNLOCK(mp, s);
	}
}
Beispiel #4
0
/*ARGSUSED*/
void
xfs_iflush_done(
	xfs_buf_t		*bp,
	xfs_inode_log_item_t	*iip)
{
	xfs_inode_t	*ip;
	SPLDECL(s);

	ip = iip->ili_inode;

	/*
	 * We only want to pull the item from the AIL if it is
	 * actually there and its location in the log has not
	 * changed since we started the flush.  Thus, we only bother
	 * if the ili_logged flag is set and the inode's lsn has not
	 * changed.  First we check the lsn outside
	 * the lock since it's cheaper, and then we recheck while
	 * holding the lock before removing the inode from the AIL.
	 */
	if (iip->ili_logged &&
	    (iip->ili_item.li_lsn == iip->ili_flush_lsn)) {
		AIL_LOCK(ip->i_mount, s);
		if (iip->ili_item.li_lsn == iip->ili_flush_lsn) {
			/*
			 * xfs_trans_delete_ail() drops the AIL lock.
			 */
			xfs_trans_delete_ail(ip->i_mount,
					     (xfs_log_item_t*)iip, s);
		} else {
			AIL_UNLOCK(ip->i_mount, s);
		}
	}

	iip->ili_logged = 0;

	/*
	 * Clear the ili_last_fields bits now that we know that the
	 * data corresponding to them is safely on disk.
	 */
	iip->ili_last_fields = 0;

	/*
	 * Release the inode's flush lock since we're done with it.
	 */
	xfs_ifunlock(ip);

	return;
}
Beispiel #5
0
/*
 * This is called to unpin the buffer associated with the buf log
 * item which was previously pinned with a call to xfs_buf_item_pin().
 * Just call bunpin() on the buffer to do this.
 *
 * Also drop the reference to the buf item for the current transaction.
 * If the XFS_BLI_STALE flag is set and we are the last reference,
 * then free up the buf log item and unlock the buffer.
 */
void
xfs_buf_item_unpin(
	xfs_buf_log_item_t	*bip,
	int			stale)
{
	xfs_mount_t	*mp;
	xfs_buf_t	*bp;
	int		freed;
	SPLDECL(s);

	bp = bip->bli_buf;
	ASSERT(bp != NULL);
	ASSERT(XFS_BUF_FSPRIVATE(bp, xfs_buf_log_item_t *) == bip);
	ASSERT(atomic_read(&bip->bli_refcount) > 0);
	xfs_buf_item_trace("UNPIN", bip);
	xfs_buftrace("XFS_UNPIN", bp);

	freed = atomic_dec_and_test(&bip->bli_refcount);
	mp = bip->bli_item.li_mountp;
	xfs_bunpin(bp);
	if (freed && stale) {
		ASSERT(bip->bli_flags & XFS_BLI_STALE);
		ASSERT(XFS_BUF_VALUSEMA(bp) <= 0);
		ASSERT(!(XFS_BUF_ISDELAYWRITE(bp)));
		ASSERT(XFS_BUF_ISSTALE(bp));
		ASSERT(bip->bli_format.blf_flags & XFS_BLI_CANCEL);
		xfs_buf_item_trace("UNPIN STALE", bip);
		xfs_buftrace("XFS_UNPIN STALE", bp);
		/*
		 * If we get called here because of an IO error, we may
		 * or may not have the item on the AIL. xfs_trans_delete_ail()
		 * will take care of that situation.
		 * xfs_trans_delete_ail() drops the AIL lock.
		 */
		if (bip->bli_flags & XFS_BLI_STALE_INODE) {
			xfs_buf_do_callbacks(bp, (xfs_log_item_t *)bip);
			XFS_BUF_SET_FSPRIVATE(bp, NULL);
			XFS_BUF_CLR_IODONE_FUNC(bp);
		} else {
			AIL_LOCK(mp,s);
			xfs_trans_delete_ail(mp, (xfs_log_item_t *)bip, s);
			xfs_buf_item_relse(bp);
			ASSERT(XFS_BUF_FSPRIVATE(bp, void *) == NULL);
		}
		xfs_buf_relse(bp);
	}
Beispiel #6
0
/*ARGSUSED*/
STATIC xfs_lsn_t
xfs_qm_qoffend_logitem_committed(
	xfs_qoff_logitem_t *qfe,
	xfs_lsn_t lsn)
{
	xfs_qoff_logitem_t	*qfs;

	qfs = qfe->qql_start_lip;
	spin_lock(&qfs->qql_item.li_mountp->m_ail_lock);
	/*
	 * Delete the qoff-start logitem from the AIL.
	 * xfs_trans_delete_ail() drops the AIL lock.
	 */
	xfs_trans_delete_ail(qfs->qql_item.li_mountp, (xfs_log_item_t *)qfs);
	kmem_free(qfs, sizeof(xfs_qoff_logitem_t));
	kmem_free(qfe, sizeof(xfs_qoff_logitem_t));
	return (xfs_lsn_t)-1;
}
/*ARGSUSED*/
STATIC void
xfs_efi_item_unpin(xfs_efi_log_item_t *efip, int stale)
{
	xfs_mount_t	*mp;

	mp = efip->efi_item.li_mountp;
	spin_lock(&mp->m_ail_lock);
	if (efip->efi_flags & XFS_EFI_CANCELED) {
		/*
		 * xfs_trans_delete_ail() drops the AIL lock.
		 */
		xfs_trans_delete_ail(mp, (xfs_log_item_t *)efip);
		xfs_efi_item_free(efip);
	} else {
		efip->efi_flags |= XFS_EFI_COMMITTED;
		spin_unlock(&mp->m_ail_lock);
	}
}
/*ARGSUSED*/
STATIC void
xfs_efi_item_unpin(xfs_efi_log_item_t *efip, int stale)
{
	xfs_mount_t	*mp;
	SPLDECL(s);

	mp = efip->efi_item.li_mountp;
	AIL_LOCK(mp, s);
	if (efip->efi_flags & XFS_EFI_CANCELED) {
		/*
		 * xfs_trans_delete_ail() drops the AIL lock.
		 */
		xfs_trans_delete_ail(mp, (xfs_log_item_t *)efip, s);
		xfs_efi_item_free(efip);
	} else {
		efip->efi_flags |= XFS_EFI_COMMITTED;
		AIL_UNLOCK(mp, s);
	}
}
/*
 * like unpin only we have to also clear the xaction descriptor
 * pointing the log item if we free the item.  This routine duplicates
 * unpin because efi_flags is protected by the AIL lock.  Freeing
 * the descriptor and then calling unpin would force us to drop the AIL
 * lock which would open up a race condition.
 */
STATIC void
xfs_efi_item_unpin_remove(xfs_efi_log_item_t *efip, xfs_trans_t *tp)
{
	int		nexts;
	int		size;
	xfs_mount_t	*mp;
	xfs_log_item_desc_t	*lidp;
	SPLDECL(s);

	mp = efip->efi_item.li_mountp;
	AIL_LOCK(mp, s);
	if (efip->efi_flags & XFS_EFI_CANCELED) {
		/*
		 * free the xaction descriptor pointing to this item
		 */
		lidp = xfs_trans_find_item(tp, (xfs_log_item_t *) efip);
		xfs_trans_free_item(tp, lidp);
		/*
		 * pull the item off the AIL.
		 * xfs_trans_delete_ail() drops the AIL lock.
		 */
		xfs_trans_delete_ail(mp, (xfs_log_item_t *)efip, s);
		/*
		 * now free the item itself
		 */
		nexts = efip->efi_format.efi_nextents;
		if (nexts > XFS_EFI_MAX_FAST_EXTENTS) {
			size = sizeof(xfs_efi_log_item_t);
			size += (nexts - 1) * sizeof(xfs_extent_t);
			kmem_free(efip, size);
		} else {
			kmem_zone_free(xfs_efi_zone, efip);
		}
	} else {
		efip->efi_flags |= XFS_EFI_COMMITTED;
		AIL_UNLOCK(mp, s);
	}

	return;
}
Beispiel #10
0
/*
 * This is the inode flushing abort routine.  It is called
 * from xfs_iflush when the filesystem is shutting down to clean
 * up the inode state.
 * It is responsible for removing the inode item
 * from the AIL if it has not been re-logged, and unlocking the inode's
 * flush lock.
 */
void
xfs_iflush_abort(
	xfs_inode_t		*ip)
{
	xfs_inode_log_item_t	*iip;
	xfs_mount_t		*mp;
	SPLDECL(s);

	iip = ip->i_itemp;
	mp = ip->i_mount;
	if (iip) {
		if (iip->ili_item.li_flags & XFS_LI_IN_AIL) {
			AIL_LOCK(mp, s);
			if (iip->ili_item.li_flags & XFS_LI_IN_AIL) {
				/*
				 * xfs_trans_delete_ail() drops the AIL lock.
				 */
				xfs_trans_delete_ail(mp, (xfs_log_item_t *)iip,
					s);
			} else
				AIL_UNLOCK(mp, s);
		}
		iip->ili_logged = 0;
		/*
		 * Clear the ili_last_fields bits now that we know that the
		 * data corresponding to them is safely on disk.
		 */
		iip->ili_last_fields = 0;
		/*
		 * Clear the inode logging fields so no more flushes are
		 * attempted.
		 */
		iip->ili_format.ilf_fields = 0;
	}
	/*
	 * Release the inode's flush lock since we're done with it.
	 */
	xfs_ifunlock(ip);
}
/*
 * This is called by the efd item code below to release references to
 * the given efi item.  Each efd calls this with the number of
 * extents that it has logged, and when the sum of these reaches
 * the total number of extents logged by this efi item we can free
 * the efi item.
 *
 * Freeing the efi item requires that we remove it from the AIL.
 * We'll use the AIL lock to protect our counters as well as
 * the removal from the AIL.
 */
void
xfs_efi_release(xfs_efi_log_item_t	*efip,
		uint			nextents)
{
	xfs_mount_t	*mp;
	int		extents_left;
	uint		size;
	int		nexts;
	SPLDECL(s);

	mp = efip->efi_item.li_mountp;
	ASSERT(efip->efi_next_extent > 0);
	ASSERT(efip->efi_flags & XFS_EFI_COMMITTED);

	AIL_LOCK(mp, s);
	ASSERT(efip->efi_next_extent >= nextents);
	efip->efi_next_extent -= nextents;
	extents_left = efip->efi_next_extent;
	if (extents_left == 0) {
		/*
		 * xfs_trans_delete_ail() drops the AIL lock.
		 */
		xfs_trans_delete_ail(mp, (xfs_log_item_t *)efip, s);
	} else {
		AIL_UNLOCK(mp, s);
	}

	if (extents_left == 0) {
		nexts = efip->efi_format.efi_nextents;
		if (nexts > XFS_EFI_MAX_FAST_EXTENTS) {
			size = sizeof(xfs_efi_log_item_t);
			size += (nexts - 1) * sizeof(xfs_extent_t);
			kmem_free(efip, size);
		} else {
			kmem_zone_free(xfs_efi_zone, efip);
		}
	}
}
/*ARGSUSED*/
STATIC void
xfs_qm_dqflush_done(
	xfs_buf_t		*bp,
	xfs_dq_logitem_t	*qip)
{
	xfs_dquot_t		*dqp;
	SPLDECL(s);

	dqp = qip->qli_dquot;

	/*
	 * We only want to pull the item from the AIL if its
	 * location in the log has not changed since we started the flush.
	 * Thus, we only bother if the dquot's lsn has
	 * not changed. First we check the lsn outside the lock
	 * since it's cheaper, and then we recheck while
	 * holding the lock before removing the dquot from the AIL.
	 */
	if ((qip->qli_item.li_flags & XFS_LI_IN_AIL) &&
	    qip->qli_item.li_lsn == qip->qli_flush_lsn) {

		AIL_LOCK(dqp->q_mount, s);
		/*
		 * xfs_trans_delete_ail() drops the AIL lock.
		 */
		if (qip->qli_item.li_lsn == qip->qli_flush_lsn)
			xfs_trans_delete_ail(dqp->q_mount,
					     (xfs_log_item_t*)qip, s);
		else
			AIL_UNLOCK(dqp->q_mount, s);
	}

	/*
	 * Release the dq's flush lock since we're done with it.
	 */
	xfs_dqfunlock(dqp);
}