btrfs-progs: add btrfs_clear_free_space_tree() from the kernel

[platform/upstream/btrfs-progs.git] / ctree.h

diff --git a/ctree.h b/ctree.h
index 52ddd52..b433bca 100644 (file)
--- a/ctree.h
+++ b/ctree.h
@@ -467,6 +467,14 @@ struct btrfs_super_block {
  * ones specified below then we will fail to mount
  */
 #define BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE        (1ULL << 0)
+/*
+ * Older kernels on big-endian systems produced broken free space tree bitmaps,
+ * and btrfs-progs also used to corrupt the free space tree. If this bit is
+ * clear, then the free space tree cannot be trusted. btrfs-progs can also
+ * intentionally clear this bit to ask the kernel to rebuild the free space
+ * tree.
+ */
+#define BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID  (1ULL << 1)
 
 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF   (1ULL << 0)
 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL  (1ULL << 1)
@@ -493,6 +501,11 @@ struct btrfs_super_block {
 
 #define BTRFS_FEATURE_COMPAT_SUPP              0ULL
 
+/*
+ * The FREE_SPACE_TREE and FREE_SPACE_TREE_VALID compat_ro bits must not be
+ * added here until read-write support for the free space tree is implemented in
+ * btrfs-progs.
+ */
 #define BTRFS_FEATURE_COMPAT_RO_SUPP           0ULL
 
 #define BTRFS_FEATURE_INCOMPAT_SUPP                    \
@@ -559,16 +572,16 @@ struct btrfs_path {
        /* The kernel locking sheme is not done in userspace. */
        int locks[BTRFS_MAX_LEVEL];
 #endif
-       int reada;
+       signed char reada;
        /* keep some upper locks as we walk down */
-       int lowest_level;
+       u8 lowest_level;
 
        /*
         * set by btrfs_split_item, tells search_slot to keep all locks
         * and to force calls to keep space in the nodes
         */
-       unsigned int search_for_split:1;
-       unsigned int skip_check_block:1;
+       u8 search_for_split;
+       u8 skip_check_block;
 };
 
 /*
@@ -2491,6 +2504,10 @@ int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
                  struct extent_buffer *buf, int record_parent);
 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
                  struct extent_buffer *buf, int record_parent);
+int btrfs_free_tree_block(struct btrfs_trans_handle *trans,
+                         struct btrfs_root *root,
+                         struct extent_buffer *buf,
+                         u64 parent, int last_ref);
 int btrfs_free_extent(struct btrfs_trans_handle *trans,
                      struct btrfs_root *root,
                      u64 bytenr, u64 num_bytes, u64 parent,
@@ -2651,6 +2668,8 @@ int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
                      *root, struct btrfs_key *key, struct btrfs_root_item
                      *item);
+int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
+                  struct btrfs_key *key);
 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
                      *root, struct btrfs_key *key, struct btrfs_root_item
                      *item);