Commit ade1726d authored Dec 07, 2022 by Jan Kara Committed by Greg Kroah-Hartman Jan 18, 2023

udf: Do not bother looking for prealloc extents if i_lenExtents matches i_size



commit 6ad53f0f71c52871202a7bf096feb2c59db33fc5 upstream.

If rounded block-rounded i_lenExtents matches block rounded i_size,
there are no preallocation extents. Do not bother walking extent linked
list.

CC: stable@vger.kernel.org
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent 4d835efd

fs/udf/truncate.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -127,9 +127,10 @@ void udf_discard_prealloc(struct inode *inode)
		uint64_t lbcount = 0;
		int8_t etype = -1, netype;
		struct udf_inode_info *iinfo = UDF_I(inode);
		int bsize = 1 << inode->i_blkbits;

		if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB \|\|
		inode->i_size == iinfo->i_lenExtents)
		ALIGN(inode->i_size, bsize) == ALIGN(iinfo->i_lenExtents, bsize))
		return;

		epos.block = iinfo->i_location;