Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux...

[sfrench/cifs-2.6.git] / fs / btrfs / extent-tree.c

diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 6f080451fcb11181c10247a542b599412bb42f22..8b353ad02f034a9307e1da5d8923aff6b43a0dcb 100644 (file)
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -3325,6 +3325,32 @@ out:
        return ret;
 }
 
+int btrfs_setup_space_cache(struct btrfs_trans_handle *trans,
+                           struct btrfs_root *root)
+{
+       struct btrfs_block_group_cache *cache, *tmp;
+       struct btrfs_transaction *cur_trans = trans->transaction;
+       struct btrfs_path *path;
+
+       if (list_empty(&cur_trans->dirty_bgs) ||
+           !btrfs_test_opt(root, SPACE_CACHE))
+               return 0;
+
+       path = btrfs_alloc_path();
+       if (!path)
+               return -ENOMEM;
+
+       /* Could add new block groups, use _safe just in case */
+       list_for_each_entry_safe(cache, tmp, &cur_trans->dirty_bgs,
+                                dirty_list) {
+               if (cache->disk_cache_state == BTRFS_DC_CLEAR)
+                       cache_save_setup(cache, trans, path);
+       }
+
+       btrfs_free_path(path);
+       return 0;
+}
+
 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
                                   struct btrfs_root *root)
 {
@@ -5110,7 +5136,11 @@ int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes)
        num_bytes = ALIGN(num_bytes, root->sectorsize);
 
        spin_lock(&BTRFS_I(inode)->lock);
-       BTRFS_I(inode)->outstanding_extents++;
+       nr_extents = (unsigned)div64_u64(num_bytes +
+                                        BTRFS_MAX_EXTENT_SIZE - 1,
+                                        BTRFS_MAX_EXTENT_SIZE);
+       BTRFS_I(inode)->outstanding_extents += nr_extents;
+       nr_extents = 0;
 
        if (BTRFS_I(inode)->outstanding_extents >
            BTRFS_I(inode)->reserved_extents)
@@ -5255,6 +5285,9 @@ void btrfs_delalloc_release_metadata(struct inode *inode, u64 num_bytes)
        if (dropped > 0)
                to_free += btrfs_calc_trans_metadata_size(root, dropped);
 
+       if (btrfs_test_is_dummy_root(root))
+               return;
+
        trace_btrfs_space_reservation(root->fs_info, "delalloc",
                                      btrfs_ino(inode), to_free, 0);
        if (root->fs_info->quota_enabled) {