Btrfs: Introduce contexts for metadata reservation

[deliverable/linux.git] / fs / btrfs / ctree.h

diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 85c7b95dd2fe6d775e54559a0a61cf6f35431d95..7d2479694a58a7ee8f43ab93975d003d5d85e8f1 100644 (file)
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -707,6 +707,20 @@ struct btrfs_space_info {
        atomic_t caching_threads;
 };
 
+struct btrfs_block_rsv {
+       u64 size;
+       u64 reserved;
+       u64 freed[2];
+       struct btrfs_space_info *space_info;
+       struct list_head list;
+       spinlock_t lock;
+       atomic_t usage;
+       unsigned int priority:8;
+       unsigned int durable:1;
+       unsigned int refill_used:1;
+       unsigned int full:1;
+};
+
 /*
  * free clusters are used to claim free space in relatively large chunks,
  * allowing us to do less seeky writes.  They are used for all metadata
@@ -757,6 +771,7 @@ struct btrfs_block_group_cache {
        spinlock_t lock;
        u64 pinned;
        u64 reserved;
+       u64 reserved_pinned;
        u64 bytes_super;
        u64 flags;
        u64 sectorsize;
@@ -822,6 +837,22 @@ struct btrfs_fs_info {
        /* logical->physical extent mapping */
        struct btrfs_mapping_tree mapping_tree;
 
+       /* block reservation for extent, checksum and root tree */
+       struct btrfs_block_rsv global_block_rsv;
+       /* block reservation for delay allocation */
+       struct btrfs_block_rsv delalloc_block_rsv;
+       /* block reservation for metadata operations */
+       struct btrfs_block_rsv trans_block_rsv;
+       /* block reservation for chunk tree */
+       struct btrfs_block_rsv chunk_block_rsv;
+
+       struct btrfs_block_rsv empty_block_rsv;
+
+       /* list of block reservations that cross multiple transactions */
+       struct list_head durable_block_rsv_list;
+
+       struct mutex durable_block_rsv_mutex;
+
        u64 generation;
        u64 last_trans_committed;
 
@@ -1008,6 +1039,9 @@ struct btrfs_root {
        struct completion kobj_unregister;
        struct mutex objectid_mutex;
 
+       spinlock_t accounting_lock;
+       struct btrfs_block_rsv *block_rsv;
+
        struct mutex log_mutex;
        wait_queue_head_t log_writer_wait;
        wait_queue_head_t log_commit_wait[2];
@@ -1980,10 +2014,10 @@ struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
                                        u64 parent, u64 root_objectid,
                                        struct btrfs_disk_key *key, int level,
                                        u64 hint, u64 empty_size);
-int btrfs_free_tree_block(struct btrfs_trans_handle *trans,
-                         struct btrfs_root *root,
-                         u64 bytenr, u32 blocksize,
-                         u64 parent, u64 root_objectid, int level);
+void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
+                          struct btrfs_root *root,
+                          struct extent_buffer *buf,
+                          u64 parent, int last_ref);
 struct extent_buffer *btrfs_init_new_buffer(struct btrfs_trans_handle *trans,
                                            struct btrfs_root *root,
                                            u64 bytenr, u32 blocksize,
@@ -2037,9 +2071,6 @@ int btrfs_make_block_group(struct btrfs_trans_handle *trans,
                           u64 size);
 int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
                             struct btrfs_root *root, u64 group_start);
-int btrfs_prepare_block_group_relocation(struct btrfs_root *root,
-                               struct btrfs_block_group_cache *group);
-
 u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags);
 void btrfs_set_inode_space_info(struct btrfs_root *root, struct inode *ionde);
 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
@@ -2058,6 +2089,30 @@ void btrfs_delalloc_reserve_space(struct btrfs_root *root, struct inode *inode,
                                 u64 bytes);
 void btrfs_delalloc_free_space(struct btrfs_root *root, struct inode *inode,
                              u64 bytes);
+void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv);
+struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root);
+void btrfs_free_block_rsv(struct btrfs_root *root,
+                         struct btrfs_block_rsv *rsv);
+void btrfs_add_durable_block_rsv(struct btrfs_fs_info *fs_info,
+                                struct btrfs_block_rsv *rsv);
+int btrfs_block_rsv_add(struct btrfs_trans_handle *trans,
+                       struct btrfs_root *root,
+                       struct btrfs_block_rsv *block_rsv,
+                       u64 num_bytes, int *retries);
+int btrfs_block_rsv_check(struct btrfs_trans_handle *trans,
+                         struct btrfs_root *root,
+                         struct btrfs_block_rsv *block_rsv,
+                         u64 min_reserved, int min_factor);
+int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv,
+                           struct btrfs_block_rsv *dst_rsv,
+                           u64 num_bytes);
+void btrfs_block_rsv_release(struct btrfs_root *root,
+                            struct btrfs_block_rsv *block_rsv,
+                            u64 num_bytes);
+int btrfs_set_block_group_ro(struct btrfs_root *root,
+                            struct btrfs_block_group_cache *cache);
+int btrfs_set_block_group_rw(struct btrfs_root *root,
+                            struct btrfs_block_group_cache *cache);
 /* ctree.c */
 int btrfs_bin_search(struct extent_buffer *eb, struct btrfs_key *key,
                     int level, int *slot);