These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / kernel / fs / btrfs / delayed-ref.h

diff --git a/kernel/fs/btrfs/delayed-ref.h b/kernel/fs/btrfs/delayed-ref.h
index 5eb0892..00ed02c 100644 (file)
--- a/kernel/fs/btrfs/delayed-ref.h
+++ b/kernel/fs/btrfs/delayed-ref.h
@@ -24,9 +24,25 @@
 #define BTRFS_ADD_DELAYED_EXTENT 3 /* record a full extent allocation */
 #define BTRFS_UPDATE_DELAYED_HEAD 4 /* not changing ref count on head ref */
 
+/*
+ * XXX: Qu: I really hate the design that ref_head and tree/data ref shares the
+ * same ref_node structure.
+ * Ref_head is in a higher logic level than tree/data ref, and duplicated
+ * bytenr/num_bytes in ref_node is really a waste or memory, they should be
+ * referred from ref_head.
+ * This gets more disgusting after we use list to store tree/data ref in
+ * ref_head. Must clean this mess up later.
+ */
 struct btrfs_delayed_ref_node {
+       /*
+        * ref_head use rb tree, stored in ref_root->href.
+        * indexed by bytenr
+        */
        struct rb_node rb_node;
 
+       /*data/tree ref use list, stored in ref_head->ref_list. */
+       struct list_head list;
+
        /* the starting bytenr of the extent */
        u64 bytenr;
 
@@ -52,7 +68,6 @@ struct btrfs_delayed_ref_node {
 
        unsigned int action:8;
        unsigned int type:8;
-       unsigned int no_quota:1;
        /* is this node still in the rbtree? */
        unsigned int is_head:1;
        unsigned int in_tree:1;
@@ -83,7 +98,7 @@ struct btrfs_delayed_ref_head {
        struct mutex mutex;
 
        spinlock_t lock;
-       struct rb_root ref_root;
+       struct list_head ref_list;
 
        struct rb_node href_node;
 
@@ -96,6 +111,17 @@ struct btrfs_delayed_ref_head {
         */
        int total_ref_mod;
 
+       /*
+        * For qgroup reserved space freeing.
+        *
+        * ref_root and reserved will be recorded after
+        * BTRFS_ADD_DELAYED_EXTENT is called.
+        * And will be used to free reserved qgroup space at
+        * run_delayed_refs() time.
+        */
+       u64 qgroup_ref_root;
+       u64 qgroup_reserved;
+
        /*
         * when a new extent is allocated, it is just reserved in memory
         * The actual extent isn't inserted into the extent allocation tree
@@ -132,6 +158,9 @@ struct btrfs_delayed_ref_root {
        /* head ref rbtree */
        struct rb_root href_root;
 
+       /* dirty extent records */
+       struct rb_root dirty_extent_root;
+
        /* this spin lock protects the rbtree and the entries inside */
        spinlock_t lock;
 
@@ -156,6 +185,14 @@ struct btrfs_delayed_ref_root {
        int flushing;
 
        u64 run_delayed_start;
+
+       /*
+        * To make qgroup to skip given root.
+        * This is for snapshot, as btrfs_qgroup_inherit() will manully
+        * modify counters for snapshot and its source, so we should skip
+        * the snapshot in new_root/old_roots or it will get calculated twice
+        */
+       u64 qgroup_to_skip;
 };
 
 extern struct kmem_cache *btrfs_delayed_ref_head_cachep;
@@ -206,15 +243,16 @@ int btrfs_add_delayed_tree_ref(struct btrfs_fs_info *fs_info,
                               struct btrfs_trans_handle *trans,
                               u64 bytenr, u64 num_bytes, u64 parent,
                               u64 ref_root, int level, int action,
-                              struct btrfs_delayed_extent_op *extent_op,
-                              int no_quota);
+                              struct btrfs_delayed_extent_op *extent_op);
 int btrfs_add_delayed_data_ref(struct btrfs_fs_info *fs_info,
                               struct btrfs_trans_handle *trans,
                               u64 bytenr, u64 num_bytes,
                               u64 parent, u64 ref_root,
-                              u64 owner, u64 offset, int action,
-                              struct btrfs_delayed_extent_op *extent_op,
-                              int no_quota);
+                              u64 owner, u64 offset, u64 reserved, int action,
+                              struct btrfs_delayed_extent_op *extent_op);
+int btrfs_add_delayed_qgroup_reserve(struct btrfs_fs_info *fs_info,
+                                    struct btrfs_trans_handle *trans,
+                                    u64 ref_root, u64 bytenr, u64 num_bytes);
 int btrfs_add_delayed_extent_op(struct btrfs_fs_info *fs_info,
                                struct btrfs_trans_handle *trans,
                                u64 bytenr, u64 num_bytes,