fs/xfs/xfs_iomap.c

39 	xfs_bmbt_irec_t	*imap)
46 		(unsigned long long)imap->br_startblock,
47 		(unsigned long long)imap->br_startoff,
48 		(unsigned long long)imap->br_blockcount,
49 		imap->br_state);
97 	struct xfs_bmbt_irec	*imap,
105 	if (unlikely(!xfs_valid_startblock(ip, imap->br_startblock))) {
107 		return xfs_alert_fsblock_zero(ip, imap);
110 	if (imap->br_startblock == HOLESTARTBLOCK) {
113 	} else if (imap->br_startblock == DELAYSTARTBLOCK ||
114 		   isnullstartblock(imap->br_startblock)) {
118 		iomap->addr = BBTOB(xfs_fsb_to_db(ip, imap->br_startblock));
122 		if (imap->br_state == XFS_EXT_UNWRITTEN)
128 	iomap->offset = XFS_FSB_TO_B(mp, imap->br_startoff);
129 	iomap->length = XFS_FSB_TO_B(mp, imap->br_blockcount);
246 	struct xfs_bmbt_irec	*imap,
290 		if (imap->br_state == XFS_EXT_UNWRITTEN) {
307 	 * From this point onwards we overwrite the imap pointer that the
312 				imap, &nimaps);
323 	if (unlikely(!xfs_valid_startblock(ip, imap->br_startblock))) {
325 		error = xfs_alert_fsblock_zero(ip, imap);
574 	xfs_bmbt_irec_t imap;
628 					XFS_BMAPI_CONVERT, resblks, &imap,
654 		if (unlikely(!xfs_valid_startblock(ip, imap.br_startblock))) {
656 			return xfs_alert_fsblock_zero(ip, &imap);
659 		if ((numblks_fsb = imap.br_blockcount) == 0) {
664 			ASSERT(imap.br_blockcount);
683 	struct xfs_bmbt_irec	*imap,
690 	    imap->br_startblock == HOLESTARTBLOCK ||
691 	    imap->br_startblock == DELAYSTARTBLOCK)
694 	if ((flags & IOMAP_DAX) && imap->br_state == XFS_EXT_UNWRITTEN)
703 	struct xfs_bmbt_irec	*imap,
712 		    imap->br_startblock == HOLESTARTBLOCK ||
713 		    imap->br_state == XFS_EXT_UNWRITTEN)
771  * Check that the imap we are going to return to the caller spans the entire
776 	struct xfs_bmbt_irec	*imap,
780 	if (imap->br_startoff > offset_fsb)
782 	if (imap->br_startoff + imap->br_blockcount < end_fsb)
798 	struct xfs_bmbt_irec	imap, cmap;
824 	error = xfs_bmapi_read(ip, offset_fsb, end_fsb - offset_fsb, &imap,
829 	if (imap_needs_cow(ip, flags, &imap, nimaps)) {
835 		error = xfs_reflink_allocate_cow(ip, &imap, &cmap, &shared,
842 		end_fsb = imap.br_startoff + imap.br_blockcount;
846 	if (imap_needs_alloc(inode, flags, &imap, nimaps))
857 		if (!imap_spans_range(&imap, offset_fsb, end_fsb))
869 		if (imap.br_state != XFS_EXT_NORM &&
876 	trace_xfs_iomap_found(ip, offset, length, XFS_DATA_FORK, &imap);
877 	return xfs_bmbt_to_iomap(ip, iomap, &imap, flags, iomap_flags, seq);
898 	else if (nimaps && imap.br_startblock == HOLESTARTBLOCK)
899 		end_fsb = min(end_fsb, imap.br_startoff + imap.br_blockcount);
903 			flags, &imap, &seq);
907 	trace_xfs_iomap_alloc(ip, offset, length, XFS_DATA_FORK, &imap);
908 	return xfs_bmbt_to_iomap(ip, iomap, &imap, flags,
914 	if (imap.br_startblock != HOLESTARTBLOCK) {
916 		error = xfs_bmbt_to_iomap(ip, srcmap, &imap, flags, 0, seq);
974 	struct xfs_bmbt_irec	imap, cmap;
1018 	eof = !xfs_iext_lookup_extent(ip, &ip->i_df, offset_fsb, &icur, &imap);
1020 		imap.br_startoff = end_fsb; /* fake hole until the end */
1024 	    imap.br_startoff > offset_fsb) {
1025 		xfs_hole_to_iomap(ip, iomap, offset_fsb, imap.br_startoff);
1034 	if ((flags & IOMAP_ZERO) && imap.br_startoff <= offset_fsb &&
1035 	    isnullstartblock(imap.br_startblock)) {
1042 			xfs_trim_extent(&imap, offset_fsb,
1068 	if (imap.br_startoff <= offset_fsb) {
1075 		    ((flags & IOMAP_ZERO) && imap.br_state != XFS_EXT_NORM)) {
1077 					&imap);
1081 		xfs_trim_extent(&imap, offset_fsb, end_fsb - offset_fsb);
1084 		error = xfs_bmap_trim_cow(ip, &imap, &shared);
1091 					&imap);
1100 		end_fsb = imap.br_startoff + imap.br_blockcount;
1154 			allocfork == XFS_DATA_FORK ? &imap : &cmap,
1184 	trace_xfs_iomap_alloc(ip, offset, count, allocfork, &imap);
1185 	return xfs_bmbt_to_iomap(ip, iomap, &imap, flags, IOMAP_F_NEW, seq);
1190 	return xfs_bmbt_to_iomap(ip, iomap, &imap, flags, 0, seq);
1200 	trace_xfs_iomap_alloc(ip, offset, count, XFS_DATA_FORK, &imap);
1205 	if (imap.br_startoff <= offset_fsb) {
1206 		error = xfs_bmbt_to_iomap(ip, srcmap, &imap, flags, 0, seq);
1215 	xfs_trim_extent(&cmap, offset_fsb, imap.br_startoff - offset_fsb);
1282 	struct xfs_bmbt_irec	imap;
1298 	error = xfs_bmapi_read(ip, offset_fsb, end_fsb - offset_fsb, &imap,
1301 		error = xfs_reflink_trim_around_shared(ip, &imap, &shared);
1307 	trace_xfs_iomap_found(ip, offset, length, XFS_DATA_FORK, &imap);
1308 	return xfs_bmbt_to_iomap(ip, iomap, &imap, flags,
1331 	struct xfs_bmbt_irec	imap, cmap;
1344 	if (xfs_iext_lookup_extent(ip, &ip->i_df, offset_fsb, &icur, &imap)) {
1348 		if (imap.br_startoff <= offset_fsb)
1350 		data_fsb = imap.br_startoff;
1385 		imap.br_blockcount = cow_fsb - offset_fsb;
1387 		imap.br_blockcount = data_fsb - offset_fsb;
1388 	imap.br_startoff = offset_fsb;
1389 	imap.br_startblock = HOLESTARTBLOCK;
1390 	imap.br_state = XFS_EXT_NORM;
1393 	xfs_trim_extent(&imap, offset_fsb, end_fsb - offset_fsb);
1394 	error = xfs_bmbt_to_iomap(ip, iomap, &imap, flags, 0, seq);
1417 	struct xfs_bmbt_irec	imap;
1434 	error = xfs_bmapi_read(ip, offset_fsb, end_fsb - offset_fsb, &imap,
1444 	return xfs_bmbt_to_iomap(ip, iomap, &imap, flags, IOMAP_F_XATTR, seq);