--- fs/fuse/file.c

+++ fs/fuse/file.c

@@ -134,6 +134,7 @@ EXPORT_SYMBOL_GPL(fuse_do_open);

void fuse_finish_open(struct inode *inode, struct file *file)

{

struct fuse_file *ff = file->private_data;

+ struct fuse_conn *fc = get_fuse_conn(inode);

if (ff->open_flags & FOPEN_DIRECT_IO)

file->f_op = &fuse_direct_io_file_operations;

@@ -141,6 +142,15 @@ void fuse_finish_open(struct inode *inod

invalidate_inode_pages2(inode->i_mapping);

if (ff->open_flags & FOPEN_NONSEEKABLE)

nonseekable_open(inode, file);

+ if (fc->atomic_o_trunc && (file->f_flags & O_TRUNC)) {

+ struct fuse_inode *fi = get_fuse_inode(inode);

+

+ spin_lock(&fc->lock);

+ fi->attr_version = ++fc->attr_version;

+ i_size_write(inode, 0);

+ spin_unlock(&fc->lock);

+ fuse_invalidate_attr(inode);

+ }

}

int fuse_open_common(struct inode *inode, struct file *file, bool isdir)