Btrfs: mark delayed refs as for cow

[karo-tx-linux.git] / fs / btrfs / ctree.h

diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index b9ba59ff9292559330745b8afb41eefacfbf1615..543f60bddb398387fd6ca1475d74594d3a36aa7d 100644 (file)
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -848,7 +848,8 @@ struct btrfs_free_cluster {
 enum btrfs_caching_type {
        BTRFS_CACHE_NO          = 0,
        BTRFS_CACHE_STARTED     = 1,
-       BTRFS_CACHE_FINISHED    = 2,
+       BTRFS_CACHE_FAST        = 2,
+       BTRFS_CACHE_FINISHED    = 3,
 };
 
 enum btrfs_disk_cache_state {
@@ -1271,6 +1272,8 @@ struct btrfs_root {
         * for stat.  It may be used for more later
         */
        dev_t anon_dev;
+
+       int force_cow;
 };
 
 struct btrfs_ioctl_defrag_range_args {
@@ -2274,11 +2277,11 @@ struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
                                        struct btrfs_root *root, u32 blocksize,
                                        u64 parent, u64 root_objectid,
                                        struct btrfs_disk_key *key, int level,
-                                       u64 hint, u64 empty_size);
+                                       u64 hint, u64 empty_size, int for_cow);
 void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
                           struct btrfs_root *root,
                           struct extent_buffer *buf,
-                          u64 parent, int last_ref);
+                          u64 parent, int last_ref, int for_cow);
 struct extent_buffer *btrfs_init_new_buffer(struct btrfs_trans_handle *trans,
                                            struct btrfs_root *root,
                                            u64 bytenr, u32 blocksize,
@@ -2298,17 +2301,17 @@ int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
                                  u64 search_end, struct btrfs_key *ins,
                                  u64 data);
 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
-                 struct extent_buffer *buf, int full_backref);
+                 struct extent_buffer *buf, int full_backref, int for_cow);
 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
-                 struct extent_buffer *buf, int full_backref);
+                 struct extent_buffer *buf, int full_backref, int for_cow);
 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
                                struct btrfs_root *root,
                                u64 bytenr, u64 num_bytes, u64 flags,
                                int is_data);
 int btrfs_free_extent(struct btrfs_trans_handle *trans,
                      struct btrfs_root *root,
-                     u64 bytenr, u64 num_bytes, u64 parent,
-                     u64 root_objectid, u64 owner, u64 offset);
+                     u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid,
+                     u64 owner, u64 offset, int for_cow);
 
 int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len);
 int btrfs_free_and_pin_reserved_extent(struct btrfs_root *root,
@@ -2320,7 +2323,7 @@ int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
                         struct btrfs_root *root,
                         u64 bytenr, u64 num_bytes, u64 parent,
-                        u64 root_objectid, u64 owner, u64 offset);
+                        u64 root_objectid, u64 owner, u64 offset, int for_cow);
 
 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
                                    struct btrfs_root *root);
@@ -2366,6 +2369,9 @@ int btrfs_block_rsv_check(struct btrfs_root *root,
 int btrfs_block_rsv_refill(struct btrfs_root *root,
                          struct btrfs_block_rsv *block_rsv,
                          u64 min_reserved);
+int btrfs_block_rsv_refill_noflush(struct btrfs_root *root,
+                                  struct btrfs_block_rsv *block_rsv,
+                                  u64 min_reserved);
 int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv,
                            struct btrfs_block_rsv *dst_rsv,
                            u64 num_bytes);
@@ -2476,10 +2482,18 @@ static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
 }
 
 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
+static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p)
+{
+       ++p->slots[0];
+       if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
+               return btrfs_next_leaf(root, p);
+       return 0;
+}
 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
 void btrfs_drop_snapshot(struct btrfs_root *root,
-                        struct btrfs_block_rsv *block_rsv, int update_ref);
+                        struct btrfs_block_rsv *block_rsv, int update_ref,
+                        int for_reloc);
 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
                        struct btrfs_root *root,
                        struct extent_buffer *node,