Btrfs: sha256 csums on metadata

[linux-2.6-block.git] / fs / btrfs / ctree.h

diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index b2ebed756c13ddd77ff2f73df4c975820356ca4e..6ff87f44c5d8d2ab08ec811b110e5f3fb8830473 100644 (file)
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -51,11 +51,11 @@ struct btrfs_key {
  * every tree block (leaf or node) starts with this header.
  */
 struct btrfs_header {
+       __le32 csum[8];
        u8 fsid[16]; /* FS specific uuid */
        __le64 blocknr; /* which block this node is supposed to live in */
        __le64 generation;
        __le64 parentid; /* objectid of the tree root */
-       __le32 csum;
        __le32 ham;
        __le16 nritems;
        __le16 flags;
@@ -75,9 +75,10 @@ struct buffer_head;
  * it currently lacks any block count etc etc
  */
 struct btrfs_super_block {
+       __le32 csum[8];
+       /* the first 3 fields must match struct btrfs_header */
        u8 fsid[16];    /* FS specific uuid */
        __le64 blocknr; /* this block number */
-       __le32 csum;
        __le64 magic;
        __le32 blocksize;
        __le64 generation;
@@ -217,6 +218,7 @@ struct btrfs_inode_map_item {
        struct btrfs_disk_key key;
 } __attribute__ ((__packed__));
 
+struct crypto_hash;
 struct btrfs_fs_info {
        struct btrfs_root *fs_root;
        struct btrfs_root *extent_root;
@@ -236,6 +238,8 @@ struct btrfs_fs_info {
        struct inode *btree_inode;
        struct mutex trans_mutex;
        struct mutex fs_mutex;
+       struct crypto_hash *hash_tfm;
+       spinlock_t hash_lock;
 };
 
 /*