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bcachefs: Fix off by one error in bch2_extent_crc_append()

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Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet
2020-03-05 17:06:15 -05:00
committed by Kent Overstreet
parent 7699cdd587
commit e65fcb4362
1 changed files with 4 additions and 4 deletions
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8
fs/bcachefs/extents.c
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@@ -344,7 +344,7 @@ enum merge_result bch2_extent_merge(struct bch_fs *c,
crc_r.uncompressed_size > c->sb.encoded_extent_max)
return BCH_MERGE_NOMERGE;
if (crc_l.uncompressed_size + crc_r.uncompressed_size - 1 >
if (crc_l.uncompressed_size + crc_r.uncompressed_size >
bch2_crc_field_size_max[extent_entry_type(en_l)])
return BCH_MERGE_NOMERGE;
@@ -562,15 +562,15 @@ void bch2_extent_crc_append(struct bkey_i *k,
enum bch_extent_entry_type type;
if (bch_crc_bytes[new.csum_type] <= 4 &&
new.uncompressed_size - 1 <= CRC32_SIZE_MAX &&
new.uncompressed_size <= CRC32_SIZE_MAX &&
new.nonce <= CRC32_NONCE_MAX)
type = BCH_EXTENT_ENTRY_crc32;
else if (bch_crc_bytes[new.csum_type] <= 10 &&
new.uncompressed_size - 1 <= CRC64_SIZE_MAX &&
new.uncompressed_size <= CRC64_SIZE_MAX &&
new.nonce <= CRC64_NONCE_MAX)
type = BCH_EXTENT_ENTRY_crc64;
else if (bch_crc_bytes[new.csum_type] <= 16 &&
new.uncompressed_size - 1 <= CRC128_SIZE_MAX &&
new.uncompressed_size <= CRC128_SIZE_MAX &&
new.nonce <= CRC128_NONCE_MAX)
type = BCH_EXTENT_ENTRY_crc128;
else