xfs/libxfs/xfs_defer.c

973 	struct xfs_defer_capture	*dfc;
985 	dfc = kzalloc(sizeof(*dfc), GFP_KERNEL | __GFP_NOFAIL);
986 	INIT_LIST_HEAD(&dfc->dfc_list);
987 	INIT_LIST_HEAD(&dfc->dfc_dfops);
990 	list_splice_init(&tp->t_dfops, &dfc->dfc_dfops);
991 	dfc->dfc_tpflags = tp->t_flags & XFS_TRANS_LOWMODE;
995 	dfc->dfc_blkres = tp->t_blk_res - tp->t_blk_res_used;
996 	dfc->dfc_rtxres = tp->t_rtx_res - tp->t_rtx_res_used;
999 	dfc->dfc_logres = tp->t_log_res;
1001 	error = xfs_defer_save_resources(&dfc->dfc_held, tp);
1016 	for (i = 0; i < dfc->dfc_held.dr_inos; i++) {
1017 		xfs_assert_ilocked(dfc->dfc_held.dr_ip[i], XFS_ILOCK_EXCL);
1018 		ihold(VFS_I(dfc->dfc_held.dr_ip[i]));
1021 	for (i = 0; i < dfc->dfc_held.dr_bufs; i++)
1022 		xfs_buf_hold(dfc->dfc_held.dr_bp[i]);
1024 	return dfc;
1031 	struct xfs_defer_capture	*dfc)
1035 	xfs_defer_pending_abort_list(mp, &dfc->dfc_dfops);
1036 	xfs_defer_cancel_list(mp, &dfc->dfc_dfops);
1038 	for (i = 0; i < dfc->dfc_held.dr_bufs; i++)
1039 		xfs_buf_relse(dfc->dfc_held.dr_bp[i]);
1041 	for (i = 0; i < dfc->dfc_held.dr_inos; i++)
1042 		xfs_irele(dfc->dfc_held.dr_ip[i]);
1044 	kfree(dfc);
1061 	struct xfs_defer_capture	*dfc;
1065 	dfc = xfs_defer_ops_capture(tp);
1066 	if (IS_ERR(dfc)) {
1068 		return PTR_ERR(dfc);
1070 	if (!dfc)
1076 		xfs_defer_ops_capture_abort(mp, dfc);
1080 	list_add_tail(&dfc->dfc_list, capture_list);
1092 	struct xfs_defer_capture	*dfc,
1102 	if (dfc->dfc_held.dr_inos > 2) {
1103 		xfs_sort_inodes(dfc->dfc_held.dr_ip, dfc->dfc_held.dr_inos);
1104 		xfs_lock_inodes(dfc->dfc_held.dr_ip, dfc->dfc_held.dr_inos,
1106 	} else if (dfc->dfc_held.dr_inos == 2)
1107 		xfs_lock_two_inodes(dfc->dfc_held.dr_ip[0], XFS_ILOCK_EXCL,
1108 				    dfc->dfc_held.dr_ip[1], XFS_ILOCK_EXCL);
1109 	else if (dfc->dfc_held.dr_inos == 1)
1110 		xfs_ilock(dfc->dfc_held.dr_ip[0], XFS_ILOCK_EXCL);
1112 	for (i = 0; i < dfc->dfc_held.dr_bufs; i++)
1113 		xfs_buf_lock(dfc->dfc_held.dr_bp[i]);
1116 	xfs_defer_restore_resources(tp, &dfc->dfc_held);
1117 	memcpy(dres, &dfc->dfc_held, sizeof(struct xfs_defer_resources));
1121 	list_splice_init(&dfc->dfc_dfops, &tp->t_dfops);
1122 	tp->t_flags |= dfc->dfc_tpflags;
1124 	kfree(dfc);