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authorJan Kara <jack@suse.cz>2022-12-07 17:34:33 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2022-12-21 17:48:05 +0100
commit1cd3e9297d44a29bf9106f87e94c5ef6b248effe (patch)
tree9ba5af7fd78f03a56705e31336212da7c2c22c33
parent12a88f572d6d94b5c0b72e2d1782cc2e96ac06cf (diff)
downloadlinux-1cd3e9297d44a29bf9106f87e94c5ef6b248effe.tar.gz
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>
-rw-r--r--fs/udf/truncate.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/udf/truncate.c b/fs/udf/truncate.c
index a9790fb32f5f..036ebd892b85 100644
--- a/fs/udf/truncate.c
+++ b/fs/udf/truncate.c
@@ -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;