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Commit 456390de authored by marcin.slusarz@gmail.com's avatar marcin.slusarz@gmail.com Committed by Jan Kara
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udf: truncate: create function for updating of Allocation Ext Descriptor 



Signed-off-by: default avatarMarcin Slusarz <marcin.slusarz@gmail.com>
Cc: Jan Kara <jack@suse.cz>
Signed-off-by: default avatarJan Kara <jack@suse.cz>
parent 9de90b76

fs/udf/truncate.c

+23 −33
Original line number Diff line number Diff line
@@ -179,6 +179,24 @@ void udf_discard_prealloc(struct inode *inode) 
	brelse(epos.bh);

}



static void udf_update_alloc_ext_desc(struct inode *inode,

				      struct extent_position *epos,

				      u32 lenalloc)

{

	struct super_block *sb = inode->i_sb;

	struct udf_sb_info *sbi = UDF_SB(sb);



	struct allocExtDesc *aed = (struct allocExtDesc *) (epos->bh->b_data);

	int len = sizeof(struct allocExtDesc);



	aed->lengthAllocDescs =	cpu_to_le32(lenalloc);

	if (!UDF_QUERY_FLAG(sb, UDF_FLAG_STRICT) || sbi->s_udfrev >= 0x0201)

		len += lenalloc;



	udf_update_tag(epos->bh->b_data, len);

	mark_buffer_dirty_inode(epos->bh, inode);

}



void udf_truncate_extents(struct inode *inode)

{

	struct extent_position epos;
@@ -186,7 +204,6 @@ void udf_truncate_extents(struct inode *inode) 
	uint32_t elen, nelen = 0, indirect_ext_len = 0, lenalloc;

	int8_t etype;

	struct super_block *sb = inode->i_sb;

	struct udf_sb_info *sbi = UDF_SB(sb);

	sector_t first_block = inode->i_size >> sb->s_blocksize_bits, offset;

	loff_t byte_offset;

	int adsize;
@@ -229,24 +246,9 @@ void udf_truncate_extents(struct inode *inode) 
				} else if (!epos.bh) {

					iinfo->i_lenAlloc = lenalloc;

					mark_inode_dirty(inode);

				} else {

					struct allocExtDesc *aed =

						(struct allocExtDesc *)

						(epos.bh->b_data);

					int len = sizeof(struct allocExtDesc);



					aed->lengthAllocDescs =

						cpu_to_le32(lenalloc);

					if (!UDF_QUERY_FLAG(sb,

						UDF_FLAG_STRICT) ||

						sbi->s_udfrev >= 0x0201)

						len += lenalloc;



					udf_update_tag(epos.bh->b_data,

							len);

					mark_buffer_dirty_inode(

							epos.bh, inode);

				}

				} else

					udf_update_alloc_ext_desc(inode,

							&epos, lenalloc);

				brelse(epos.bh);

				epos.offset = sizeof(struct allocExtDesc);

				epos.block = eloc;
@@ -272,20 +274,8 @@ void udf_truncate_extents(struct inode *inode) 
		} else if (!epos.bh) {

			iinfo->i_lenAlloc = lenalloc;

			mark_inode_dirty(inode);

		} else {

			struct allocExtDesc *aed =

				(struct allocExtDesc *)(epos.bh->b_data);

			aed->lengthAllocDescs = cpu_to_le32(lenalloc);

			if (!UDF_QUERY_FLAG(sb, UDF_FLAG_STRICT) ||

				sbi->s_udfrev >= 0x0201)

				udf_update_tag(epos.bh->b_data,

					lenalloc +

					sizeof(struct allocExtDesc));

			else

				udf_update_tag(epos.bh->b_data,

					sizeof(struct allocExtDesc));

			mark_buffer_dirty_inode(epos.bh, inode);

		}

		} else

			udf_update_alloc_ext_desc(inode, &epos, lenalloc);

	} else if (inode->i_size) {

		if (byte_offset) {

			kernel_long_ad extent;