Btrfs: serialize flushers in reserve_metadata_bytes

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

diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index a2c91a1..406c338 100644 (file)
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -756,6 +756,8 @@ struct btrfs_space_info {
                                   chunks for this space */
        unsigned int chunk_alloc:1;     /* set if we are allocating a chunk */
 
+       unsigned int flush:1;           /* set if we are trying to make space */
+
        unsigned int force_alloc;       /* set if we need to force a chunk
                                           alloc for this space */
 
@@ -766,6 +768,7 @@ struct btrfs_space_info {
        spinlock_t lock;
        struct rw_semaphore groups_sem;
        atomic_t caching_threads;
+       wait_queue_head_t wait;
 };
 
 struct btrfs_block_rsv {
@@ -1195,7 +1198,6 @@ struct btrfs_root {
        struct btrfs_key defrag_max;
        int defrag_running;
        char *name;
-       int in_sysfs;
 
        /* the dirty list is only used by non-reference counted roots */
        struct list_head dirty_list;
@@ -1337,6 +1339,11 @@ struct btrfs_ioctl_defrag_range_args {
  */
 #define BTRFS_STRING_ITEM_KEY  253
 
+/*
+ * Flags for mount options.
+ *
+ * Note: don't forget to add new options to btrfs_show_options()
+ */
 #define BTRFS_MOUNT_NODATASUM          (1 << 0)
 #define BTRFS_MOUNT_NODATACOW          (1 << 1)
 #define BTRFS_MOUNT_NOBARRIER          (1 << 2)
@@ -2219,9 +2226,6 @@ void btrfs_set_inode_space_info(struct btrfs_root *root, struct inode *ionde);
 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
 int btrfs_check_data_free_space(struct inode *inode, u64 bytes);
 void btrfs_free_reserved_data_space(struct inode *inode, u64 bytes);
-int btrfs_trans_reserve_metadata(struct btrfs_trans_handle *trans,
-                               struct btrfs_root *root,
-                               int num_items);
 void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans,
                                struct btrfs_root *root);
 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans,