fs: push i_mutex and filemap_write_and_wait down into ->fsync() handlers

[mirror_ubuntu-bionic-kernel.git] / fs / hostfs / hostfs_kern.c

diff --git a/fs/hostfs/hostfs_kern.c b/fs/hostfs/hostfs_kern.c
index 6e449c599b9dbf357e630e9fba8e02a826d880e5..0d22afdd4611d53383957b86bc8688cba62ef3d4 100644 (file)
--- a/fs/hostfs/hostfs_kern.c
+++ b/fs/hostfs/hostfs_kern.c
@@ -362,9 +362,20 @@ retry:
        return 0;
 }
 
-int hostfs_fsync(struct file *file, int datasync)
+int hostfs_fsync(struct file *file, loff_t start, loff_t end, int datasync)
 {
-       return fsync_file(HOSTFS_I(file->f_mapping->host)->fd, datasync);
+       struct inode *inode = file->f_mapping->host;
+       int ret;
+
+       ret = filemap_write_and_wait_range(inode->i_mapping, start, end);
+       if (ret)
+               return ret;
+
+       mutex_lock(&inode->i_mutex);
+       ret = fsync_file(HOSTFS_I(inode)->fd, datasync);
+       mutex_unlock(&inode->i_mutex);
+
+       return ret;
 }
 
 static const struct file_operations hostfs_file_fops = {