- if (lelen)
- {
- if (!bh)
- BUG();
- else
- memset(bh->b_data, 0x00, sizeof(struct allocExtDesc));
- udf_free_blocks(inode->i_sb, inode, bloc, 0, lelen);
- }
- else
- {
- if (!bh)
- {
- UDF_I_LENALLOC(inode) = lenalloc;
- mark_inode_dirty(inode);
- }
- else
- {
- struct allocExtDesc *aed = (struct allocExtDesc *)(bh->b_data);
- aed->lengthAllocDescs = cpu_to_le32(lenalloc);
- if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || UDF_SB_UDFREV(inode->i_sb) >= 0x0201)
- udf_update_tag(bh->b_data, lenalloc +
- sizeof(struct allocExtDesc));
- else
- udf_update_tag(bh->b_data, sizeof(struct allocExtDesc));
- mark_buffer_dirty_inode(bh, inode);
- }
- }
- }
- else if (inode->i_size)
- {
- if (offset)
- {
- extoffset -= adsize;
- etype = udf_next_aext(inode, &bloc, &extoffset, &eloc, &elen, &bh, 1);
- if (etype == (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))
- {
- extoffset -= adsize;
- elen = EXT_NOT_RECORDED_NOT_ALLOCATED | (elen + offset);
- udf_write_aext(inode, bloc, &extoffset, eloc, elen, bh, 0);
- }
- else if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30))
- {
- kernel_lb_addr neloc = { 0, 0 };
- extoffset -= adsize;
- nelen = EXT_NOT_RECORDED_NOT_ALLOCATED |
- ((elen + offset + inode->i_sb->s_blocksize - 1) &
- ~(inode->i_sb->s_blocksize - 1));
- udf_write_aext(inode, bloc, &extoffset, neloc, nelen, bh, 1);
- udf_add_aext(inode, &bloc, &extoffset, eloc, (etype << 30) | elen, &bh, 1);
- }
- else
- {
- if (elen & (inode->i_sb->s_blocksize - 1))
- {
- extoffset -= adsize;
- elen = EXT_RECORDED_ALLOCATED |
- ((elen + inode->i_sb->s_blocksize - 1) &
- ~(inode->i_sb->s_blocksize - 1));
- udf_write_aext(inode, bloc, &extoffset, eloc, elen, bh, 1);
- }
- memset(&eloc, 0x00, sizeof(kernel_lb_addr));
- elen = EXT_NOT_RECORDED_NOT_ALLOCATED | offset;
- udf_add_aext(inode, &bloc, &extoffset, eloc, elen, &bh, 1);
+ if (indirect_ext_len) {
+ BUG_ON(!epos.bh);
+ udf_free_blocks(sb, inode, epos.block, 0,
+ indirect_ext_len);
+ } else if (!epos.bh) {
+ iinfo->i_lenAlloc = lenalloc;
+ mark_inode_dirty(inode);
+ } else
+ udf_update_alloc_ext_desc(inode, &epos, lenalloc);
+ } else if (inode->i_size) {
+ if (byte_offset) {
+ kernel_long_ad extent;
+
+ /*
+ * OK, there is not extent covering inode->i_size and
+ * no extent above inode->i_size => truncate is
+ * extending the file by 'offset' blocks.
+ */
+ if ((!epos.bh &&
+ epos.offset ==
+ udf_file_entry_alloc_offset(inode)) ||
+ (epos.bh && epos.offset ==
+ sizeof(struct allocExtDesc))) {
+ /* File has no extents at all or has empty last
+ * indirect extent! Create a fake extent... */
+ extent.extLocation.logicalBlockNum = 0;
+ extent.extLocation.partitionReferenceNum = 0;
+ extent.extLength =
+ EXT_NOT_RECORDED_NOT_ALLOCATED;
+ } else {
+ epos.offset -= adsize;
+ etype = udf_next_aext(inode, &epos,
+ &extent.extLocation,
+ &extent.extLength, 0);
+ extent.extLength |= etype << 30;