Merge tag 'for-usb-linus-2013-05-24' of git://git.kernel.org/pub/scm/linux/kernel...

[firefly-linux-kernel-4.4.55.git] / fs / btrfs / free-space-cache.c

diff --git a/fs/btrfs/free-space-cache.c b/fs/btrfs/free-space-cache.c
index ecca6c7375a610dbee385a71781cece9082935e0..e53009657f0e5b91b638f3d31d5e4d2cbf919f62 100644 (file)
--- a/fs/btrfs/free-space-cache.c
+++ b/fs/btrfs/free-space-cache.c
@@ -197,30 +197,32 @@ int create_free_space_inode(struct btrfs_root *root,
                                         block_group->key.objectid);
 }
 
-int btrfs_truncate_free_space_cache(struct btrfs_root *root,
-                                   struct btrfs_trans_handle *trans,
-                                   struct btrfs_path *path,
-                                   struct inode *inode)
+int btrfs_check_trunc_cache_free_space(struct btrfs_root *root,
+                                      struct btrfs_block_rsv *rsv)
 {
-       struct btrfs_block_rsv *rsv;
        u64 needed_bytes;
-       loff_t oldsize;
-       int ret = 0;
-
-       rsv = trans->block_rsv;
-       trans->block_rsv = &root->fs_info->global_block_rsv;
+       int ret;
 
        /* 1 for slack space, 1 for updating the inode */
        needed_bytes = btrfs_calc_trunc_metadata_size(root, 1) +
                btrfs_calc_trans_metadata_size(root, 1);
 
-       spin_lock(&trans->block_rsv->lock);
-       if (trans->block_rsv->reserved < needed_bytes) {
-               spin_unlock(&trans->block_rsv->lock);
-               trans->block_rsv = rsv;
-               return -ENOSPC;
-       }
-       spin_unlock(&trans->block_rsv->lock);
+       spin_lock(&rsv->lock);
+       if (rsv->reserved < needed_bytes)
+               ret = -ENOSPC;
+       else
+               ret = 0;
+       spin_unlock(&rsv->lock);
+       return 0;
+}
+
+int btrfs_truncate_free_space_cache(struct btrfs_root *root,
+                                   struct btrfs_trans_handle *trans,
+                                   struct btrfs_path *path,
+                                   struct inode *inode)
+{
+       loff_t oldsize;
+       int ret = 0;
 
        oldsize = i_size_read(inode);
        btrfs_i_size_write(inode, 0);
@@ -232,9 +234,7 @@ int btrfs_truncate_free_space_cache(struct btrfs_root *root,
         */
        ret = btrfs_truncate_inode_items(trans, root, inode,
                                         0, BTRFS_EXTENT_DATA_KEY);
-
        if (ret) {
-               trans->block_rsv = rsv;
                btrfs_abort_transaction(trans, root, ret);
                return ret;
        }
@@ -242,7 +242,6 @@ int btrfs_truncate_free_space_cache(struct btrfs_root *root,
        ret = btrfs_update_inode(trans, root, inode);
        if (ret)
                btrfs_abort_transaction(trans, root, ret);
-       trans->block_rsv = rsv;
 
        return ret;
 }
@@ -920,10 +919,8 @@ static int __btrfs_write_out_cache(struct btrfs_root *root, struct inode *inode,
 
        /* Make sure we can fit our crcs into the first page */
        if (io_ctl.check_crcs &&
-           (io_ctl.num_pages * sizeof(u32)) >= PAGE_CACHE_SIZE) {
-               WARN_ON(1);
+           (io_ctl.num_pages * sizeof(u32)) >= PAGE_CACHE_SIZE)
                goto out_nospc;
-       }
 
        io_ctl_set_generation(&io_ctl, trans->transid);