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authorJohannes Thumshirn <jthumshirn@suse.de>2019-05-22 10:19:02 +0200
committerDavid Sterba <dsterba@suse.com>2019-07-01 13:35:01 +0200
commit10fe6ca80d9d25eca9fd6d98eccf6c795532fe96 (patch)
treeed36a8a59ff0e86913f9b9492d5a743e769f3404 /fs/btrfs/compression.h
parent1e25a2e3ca0dab0ed1030570e95d98af47113eae (diff)
downloadlinux-10fe6ca80d9d25eca9fd6d98eccf6c795532fe96.tar.gz
btrfs: don't assume compressed_bio sums to be 4 bytes
BTRFS has the implicit assumption that a checksum in compressed_bio is 4
bytes. While this is true for CRC32C, it is not for any other checksum.

Change the data type to be a byte array and adjust loop index calculation
accordingly.

Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/compression.h')
-rw-r--r--fs/btrfs/compression.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/btrfs/compression.h b/fs/btrfs/compression.h
index 9976fe0f7526..191e5f4e3523 100644
--- a/fs/btrfs/compression.h
+++ b/fs/btrfs/compression.h
@@ -61,7 +61,7 @@ struct compressed_bio {
 	 * the start of a variable length array of checksums only
 	 * used by reads
 	 */
-	u32 sums;
+	u8 sums[];
 };
 
 static inline unsigned int btrfs_compress_type(unsigned int type_level)