Btrfs: Wait for IO on the block device inodes of newly added devices

[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 45bc3132b0545d1a342834fec4bc959be9bb9a15..45b4f7285275dd839c81cf7bf4ac0b97b39a9b4a 100644 (file)
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -460,6 +460,13 @@ int btrfs_wq_submit_bio(struct btrfs_fs_info *fs_info, struct inode *inode,
        async->submit_bio_hook = submit_bio_hook;
        async->work.func = run_one_async_submit;
        async->work.flags = 0;
+
+       while(atomic_read(&fs_info->async_submit_draining) &&
+             atomic_read(&fs_info->nr_async_submits)) {
+               wait_event(fs_info->async_submit_wait,
+                          (atomic_read(&fs_info->nr_async_submits) == 0));
+       }
+
        atomic_inc(&fs_info->nr_async_submits);
        btrfs_queue_worker(&fs_info->workers, &async->work);
 
@@ -495,11 +502,8 @@ static int __btree_submit_bio_hook(struct inode *inode, int rw, struct bio *bio,
                                 int mirror_num)
 {
        struct btrfs_root *root = BTRFS_I(inode)->root;
-       u64 offset;
        int ret;
 
-       offset = bio->bi_sector << 9;
-
        /*
         * when we're called for a write, we're already in the async
         * submission context.  Just jump into btrfs_map_bio
@@ -1360,6 +1364,7 @@ struct btrfs_root *open_ctree(struct super_block *sb,
        INIT_LIST_HEAD(&fs_info->space_info);
        btrfs_mapping_init(&fs_info->mapping_tree);
        atomic_set(&fs_info->nr_async_submits, 0);
+       atomic_set(&fs_info->async_submit_draining, 0);
        atomic_set(&fs_info->nr_async_bios, 0);
        atomic_set(&fs_info->throttles, 0);
        atomic_set(&fs_info->throttle_gen, 0);