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udf: Simplify udf_table_prealloc_blocks()

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Simplify handling when the specified extent is not found in the table
of free blocks.

Signed-off-by: Jan Kara <jack@suse.cz>
This commit is contained in:
Jan Kara 2026-11-05 15:09:19 +01:00
parent 94401199df
commit a3b98efdb3
1 changed files with 10 additions and 18 deletions
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28
fs/udf/balloc.c
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@ -525,30 +525,22 @@ static int udf_table_prealloc_blocks(struct super_block *sb,
while (first_block != eloc.logicalBlockNum) {
ret = udf_next_aext(table, &epos, &eloc, &elen, &etype, 1);
if (ret < 0)
if (ret <= 0)
goto err_out;
if (ret == 0)
break;
udf_debug("eloc=%u, elen=%u, first_block=%u\n",
eloc.logicalBlockNum, elen, first_block);
}
if (ret > 0 && first_block == eloc.logicalBlockNum) {
epos.offset -= adsize;
alloc_count = (elen >> sb->s_blocksize_bits);
if (alloc_count > block_count) {
alloc_count = block_count;
eloc.logicalBlockNum += alloc_count;
elen -= (alloc_count << sb->s_blocksize_bits);
udf_write_aext(table, &epos, &eloc,
(etype << 30) | elen, 1);
} else
udf_delete_aext(table, epos, &freed);
} else {
alloc_count = 0;
}
epos.offset -= adsize;
alloc_count = (elen >> sb->s_blocksize_bits);
if (alloc_count > block_count) {
alloc_count = block_count;
eloc.logicalBlockNum += alloc_count;
elen -= (alloc_count << sb->s_blocksize_bits);
udf_write_aext(table, &epos, &eloc, (etype << 30) | elen, 1);
} else
udf_delete_aext(table, epos, &freed);
err_out:
brelse(epos.bh);