예제 #1
0
/*
 * The unpin operation is the last place an BUI is manipulated in the log. It is
 * either inserted in the AIL or aborted in the event of a log I/O error. In
 * either case, the BUI transaction has been successfully committed to make it
 * this far. Therefore, we expect whoever committed the BUI to either construct
 * and commit the BUD or drop the BUD's reference in the event of error. Simply
 * drop the log's BUI reference now that the log is done with it.
 */
STATIC void
xfs_bui_item_unpin(
	struct xfs_log_item	*lip,
	int			remove)
{
	struct xfs_bui_log_item	*buip = BUI_ITEM(lip);

	xfs_bui_release(buip);
}
예제 #2
0
/*
 * The BUD is either committed or aborted if the transaction is cancelled. If
 * the transaction is cancelled, drop our reference to the BUI and free the
 * BUD.
 */
STATIC void
xfs_bud_item_unlock(
	struct xfs_log_item	*lip)
{
	struct xfs_bud_log_item	*budp = BUD_ITEM(lip);

	if (lip->li_flags & XFS_LI_ABORTED) {
		xfs_bui_release(budp->bud_buip);
		kmem_zone_free(xfs_bud_zone, budp);
	}
}
예제 #3
0
/*
 * When the bud item is committed to disk, all we need to do is delete our
 * reference to our partner bui item and then free ourselves. Since we're
 * freeing ourselves we must return -1 to keep the transaction code from
 * further referencing this item.
 */
STATIC xfs_lsn_t
xfs_bud_item_committed(
	struct xfs_log_item	*lip,
	xfs_lsn_t		lsn)
{
	struct xfs_bud_log_item	*budp = BUD_ITEM(lip);

	/*
	 * Drop the BUI reference regardless of whether the BUD has been
	 * aborted. Once the BUD transaction is constructed, it is the sole
	 * responsibility of the BUD to release the BUI (even if the BUI is
	 * aborted due to log I/O error).
	 */
	xfs_bui_release(budp->bud_buip);
	kmem_zone_free(xfs_bud_zone, budp);

	return (xfs_lsn_t)-1;
}
예제 #4
0
/*
 * Process a bmap update intent item that was recovered from the log.
 * We need to update some inode's bmbt.
 */
int
xfs_bui_recover(
	struct xfs_mount		*mp,
	struct xfs_bui_log_item		*buip,
	struct xfs_defer_ops		*dfops)
{
	int				error = 0;
	unsigned int			bui_type;
	struct xfs_map_extent		*bmap;
	xfs_fsblock_t			startblock_fsb;
	xfs_fsblock_t			inode_fsb;
	xfs_filblks_t			count;
	bool				op_ok;
	struct xfs_bud_log_item		*budp;
	enum xfs_bmap_intent_type	type;
	int				whichfork;
	xfs_exntst_t			state;
	struct xfs_trans		*tp;
	struct xfs_inode		*ip = NULL;
	struct xfs_bmbt_irec		irec;

	ASSERT(!test_bit(XFS_BUI_RECOVERED, &buip->bui_flags));

	/* Only one mapping operation per BUI... */
	if (buip->bui_format.bui_nextents != XFS_BUI_MAX_FAST_EXTENTS) {
		set_bit(XFS_BUI_RECOVERED, &buip->bui_flags);
		xfs_bui_release(buip);
		return -EIO;
	}

	/*
	 * First check the validity of the extent described by the
	 * BUI.  If anything is bad, then toss the BUI.
	 */
	bmap = &buip->bui_format.bui_extents[0];
	startblock_fsb = XFS_BB_TO_FSB(mp,
			   XFS_FSB_TO_DADDR(mp, bmap->me_startblock));
	inode_fsb = XFS_BB_TO_FSB(mp, XFS_FSB_TO_DADDR(mp,
			XFS_INO_TO_FSB(mp, bmap->me_owner)));
	switch (bmap->me_flags & XFS_BMAP_EXTENT_TYPE_MASK) {
	case XFS_BMAP_MAP:
	case XFS_BMAP_UNMAP:
		op_ok = true;
		break;
	default:
		op_ok = false;
		break;
	}
	if (!op_ok || startblock_fsb == 0 ||
	    bmap->me_len == 0 ||
	    inode_fsb == 0 ||
	    startblock_fsb >= mp->m_sb.sb_dblocks ||
	    bmap->me_len >= mp->m_sb.sb_agblocks ||
	    inode_fsb >= mp->m_sb.sb_dblocks ||
	    (bmap->me_flags & ~XFS_BMAP_EXTENT_FLAGS)) {
		/*
		 * This will pull the BUI from the AIL and
		 * free the memory associated with it.
		 */
		set_bit(XFS_BUI_RECOVERED, &buip->bui_flags);
		xfs_bui_release(buip);
		return -EIO;
	}

	error = xfs_trans_alloc(mp, &M_RES(mp)->tr_itruncate,
			XFS_EXTENTADD_SPACE_RES(mp, XFS_DATA_FORK), 0, 0, &tp);
	if (error)
		return error;
	budp = xfs_trans_get_bud(tp, buip);

	/* Grab the inode. */
	error = xfs_iget(mp, tp, bmap->me_owner, 0, XFS_ILOCK_EXCL, &ip);
	if (error)
		goto err_inode;

	if (VFS_I(ip)->i_nlink == 0)
		xfs_iflags_set(ip, XFS_IRECOVERY);

	/* Process deferred bmap item. */
	state = (bmap->me_flags & XFS_BMAP_EXTENT_UNWRITTEN) ?
			XFS_EXT_UNWRITTEN : XFS_EXT_NORM;
	whichfork = (bmap->me_flags & XFS_BMAP_EXTENT_ATTR_FORK) ?
			XFS_ATTR_FORK : XFS_DATA_FORK;
	bui_type = bmap->me_flags & XFS_BMAP_EXTENT_TYPE_MASK;
	switch (bui_type) {
	case XFS_BMAP_MAP:
	case XFS_BMAP_UNMAP:
		type = bui_type;
		break;
	default:
		error = -EFSCORRUPTED;
		goto err_inode;
	}
	xfs_trans_ijoin(tp, ip, 0);

	count = bmap->me_len;
	error = xfs_trans_log_finish_bmap_update(tp, budp, dfops, type,
			ip, whichfork, bmap->me_startoff,
			bmap->me_startblock, &count, state);
	if (error)
		goto err_inode;

	if (count > 0) {
		ASSERT(type == XFS_BMAP_UNMAP);
		irec.br_startblock = bmap->me_startblock;
		irec.br_blockcount = count;
		irec.br_startoff = bmap->me_startoff;
		irec.br_state = state;
		error = xfs_bmap_unmap_extent(tp->t_mountp, dfops, ip, &irec);
		if (error)
			goto err_inode;
	}

	set_bit(XFS_BUI_RECOVERED, &buip->bui_flags);
	error = xfs_trans_commit(tp);
	xfs_iunlock(ip, XFS_ILOCK_EXCL);
	IRELE(ip);

	return error;

err_inode:
	xfs_trans_cancel(tp);
	if (ip) {
		xfs_iunlock(ip, XFS_ILOCK_EXCL);
		IRELE(ip);
	}
	return error;
}
예제 #5
0
/* Abort all pending BUIs. */
STATIC void
xfs_bmap_update_abort_intent(
	void				*intent)
{
	xfs_bui_release(intent);
}