29 static void extent_trunc(struct inode *inode, struct extent_position *epos,  in extent_trunc()  argument
34 	int last_block = (elen + inode->i_sb->s_blocksize - 1) >>  in extent_trunc()
35 		inode->i_sb->s_blocksize_bits;  in extent_trunc()
36 	int first_block = (nelen + inode->i_sb->s_blocksize - 1) >>  in extent_trunc()
37 		inode->i_sb->s_blocksize_bits;  in extent_trunc()
41 			udf_free_blocks(inode->i_sb, inode, eloc, 0,  in extent_trunc()
50 		udf_write_aext(inode, epos, &neloc, nelen, 0);  in extent_trunc()
53 				mark_inode_dirty(inode);  in extent_trunc()
56 				udf_free_blocks(inode->i_sb, inode, eloc,  in extent_trunc()
67 void udf_truncate_tail_extent(struct inode *inode)  in udf_truncate_tail_extent()  argument
75 	struct udf_inode_info *iinfo = UDF_I(inode);  in udf_truncate_tail_extent()
78 	    inode->i_size == iinfo->i_lenExtents)  in udf_truncate_tail_extent()
81 	if (inode->i_nlink == 0)  in udf_truncate_tail_extent()
92 	while ((netype = udf_next_aext(inode, &epos, &eloc, &elen, 1)) != -1) {  in udf_truncate_tail_extent()
95 		if (lbcount > inode->i_size) {  in udf_truncate_tail_extent()
96 			if (lbcount - inode->i_size >= inode->i_sb->s_blocksize)  in udf_truncate_tail_extent()
97 				udf_warn(inode->i_sb,  in udf_truncate_tail_extent()
99 					 (unsigned)inode->i_ino,  in udf_truncate_tail_extent()
100 					 (long long)inode->i_size,  in udf_truncate_tail_extent()
104 			nelen = elen - (lbcount - inode->i_size);  in udf_truncate_tail_extent()
106 			extent_trunc(inode, &epos, &eloc, etype, elen, nelen);  in udf_truncate_tail_extent()
108 			if (udf_next_aext(inode, &epos, &eloc, &elen, 1) != -1)  in udf_truncate_tail_extent()
109 				udf_err(inode->i_sb,  in udf_truncate_tail_extent()
111 					(unsigned)inode->i_ino);  in udf_truncate_tail_extent()
117 	iinfo->i_lenExtents = inode->i_size;  in udf_truncate_tail_extent()
121 void udf_discard_prealloc(struct inode *inode)  in udf_discard_prealloc()  argument
129 	struct udf_inode_info *iinfo = UDF_I(inode);  in udf_discard_prealloc()
132 	    inode->i_size == iinfo->i_lenExtents)  in udf_discard_prealloc()
145 	while ((netype = udf_next_aext(inode, &epos, &eloc, &elen, 1)) != -1) {  in udf_discard_prealloc()
152 		extent_trunc(inode, &epos, &eloc, etype, elen, 0);  in udf_discard_prealloc()
156 				udf_file_entry_alloc_offset(inode);  in udf_discard_prealloc()
157 			mark_inode_dirty(inode);  in udf_discard_prealloc()
164 			if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||  in udf_discard_prealloc()
165 			    UDF_SB(inode->i_sb)->s_udfrev >= 0x0201)  in udf_discard_prealloc()
170 			mark_buffer_dirty_inode(epos.bh, inode);  in udf_discard_prealloc()
179 static void udf_update_alloc_ext_desc(struct inode *inode,  in udf_update_alloc_ext_desc()  argument
183 	struct super_block *sb = inode->i_sb;  in udf_update_alloc_ext_desc()
194 	mark_buffer_dirty_inode(epos->bh, inode);  in udf_update_alloc_ext_desc()
202 void udf_truncate_extents(struct inode *inode)  in udf_truncate_extents()  argument
208 	struct super_block *sb = inode->i_sb;  in udf_truncate_extents()
209 	sector_t first_block = inode->i_size >> sb->s_blocksize_bits, offset;  in udf_truncate_extents()
212 	struct udf_inode_info *iinfo = UDF_I(inode);  in udf_truncate_extents()
221 	etype = inode_bmap(inode, first_block, &epos, &eloc, &elen, &offset);  in udf_truncate_extents()
223 		(inode->i_size & (sb->s_blocksize - 1));  in udf_truncate_extents()
230 	extent_trunc(inode, &epos, &eloc, etype, elen, byte_offset);  in udf_truncate_extents()
238 		lenalloc -= udf_file_entry_alloc_offset(inode);  in udf_truncate_extents()
242 	while ((etype = udf_current_aext(inode, &epos, &eloc,  in udf_truncate_extents()
245 			udf_write_aext(inode, &epos, &neloc, nelen, 0);  in udf_truncate_extents()
254 				mark_inode_dirty(inode);  in udf_truncate_extents()
256 				udf_update_alloc_ext_desc(inode,  in udf_truncate_extents()
270 			extent_trunc(inode, &epos, &eloc, etype, elen, 0);  in udf_truncate_extents()
280 		mark_inode_dirty(inode);  in udf_truncate_extents()
282 		udf_update_alloc_ext_desc(inode, &epos, lenalloc);  in udf_truncate_extents()
283 	iinfo->i_lenExtents = inode->i_size;  in udf_truncate_extents()