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

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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>
This commit is contained in:
Jan Kara 2022-12-07 17:34:33 +01:00 • committed by Greg Kroah-Hartman
commit ade1726d8c
1 changed files with 2 additions and 1 deletions
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3
fs/udf/truncate.c
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@ -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;