Btrfs: early work to file_write in big extents

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

diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index ef3583cf74d6d4a836ff019680a07126a510d22d..796f19d03ab5fb0c7c0142f26fb81611290d526d 100644 (file)
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -227,6 +227,7 @@ struct btrfs_file_extent_item {
 } __attribute__ ((__packed__));
 
 struct btrfs_csum_item {
+       __le64 extent_offset;
        u8 csum[BTRFS_CSUM_SIZE];
 } __attribute__ ((__packed__));
 
@@ -924,6 +925,17 @@ static inline void btrfs_set_file_extent_num_blocks(struct
        e->num_blocks = cpu_to_le64(val);
 }
 
+static inline u64 btrfs_csum_extent_offset(struct btrfs_csum_item *c)
+{
+       return le64_to_cpu(c->extent_offset);
+}
+
+static inline void btrfs_set_csum_extent_offset(struct btrfs_csum_item *c,
+                                               u64 val)
+{
+       c->extent_offset = cpu_to_le64(val);
+}
+
 static inline u16 btrfs_device_pathlen(struct btrfs_device_item *d)
 {
        return le16_to_cpu(d->pathlen);
@@ -1002,6 +1014,8 @@ int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans, struct
                               btrfs_root *root);
 /* ctree.c */
+int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
+                     *root, struct btrfs_path *path, u32 data_size);
 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
                      *root, struct btrfs_key *key, struct btrfs_path *p, int
                      ins_len, int cow);
@@ -1071,6 +1085,7 @@ int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
 int btrfs_csum_file_block(struct btrfs_trans_handle *trans,
                          struct btrfs_root *root,
                          u64 objectid, u64 offset,
+                         u64 extent_offset,
                          char *data, size_t len);
 int btrfs_csum_verify_file_block(struct btrfs_root *root,
                                 u64 objectid, u64 offset,