Btrfs: Cache free inode numbers in memory

[linux-2.6-block.git] / fs / btrfs / disk-io.c

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index ef6865c17cd621ba9ccd31979eae177668555cef..d02683b1ee16383e88fc2e6718d15a94297ca028 100644 (file)
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -41,6 +41,7 @@
 #include "locking.h"
 #include "tree-log.h"
 #include "free-space-cache.h"
+#include "inode-map.h"
 
 static struct extent_io_ops btree_extent_io_ops;
 static void end_workqueue_fn(struct btrfs_work *work);
@@ -1327,6 +1328,19 @@ again:
        if (IS_ERR(root))
                return root;
 
+       root->free_ino_ctl = kzalloc(sizeof(*root->free_ino_ctl), GFP_NOFS);
+       if (!root->free_ino_ctl)
+               goto fail;
+       root->free_ino_pinned = kzalloc(sizeof(*root->free_ino_pinned),
+                                       GFP_NOFS);
+       if (!root->free_ino_pinned)
+               goto fail;
+
+       btrfs_init_free_ino_ctl(root);
+       mutex_init(&root->fs_commit_mutex);
+       spin_lock_init(&root->cache_lock);
+       init_waitqueue_head(&root->cache_wait);
+
        set_anon_super(&root->anon_super, NULL);
 
        if (btrfs_root_refs(&root->root_item) == 0) {
@@ -2483,6 +2497,8 @@ int btrfs_free_fs_root(struct btrfs_fs_info *fs_info, struct btrfs_root *root)
        if (btrfs_root_refs(&root->root_item) == 0)
                synchronize_srcu(&fs_info->subvol_srcu);
 
+       __btrfs_remove_free_space_cache(root->free_ino_pinned);
+       __btrfs_remove_free_space_cache(root->free_ino_ctl);
        free_fs_root(root);
        return 0;
 }
@@ -2496,6 +2512,8 @@ static void free_fs_root(struct btrfs_root *root)
        }
        free_extent_buffer(root->node);
        free_extent_buffer(root->commit_root);
+       kfree(root->free_ino_ctl);
+       kfree(root->free_ino_pinned);
        kfree(root->name);
        kfree(root);
 }