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Commit 650b22b9 authored by Pavel Emelyanov's avatar Pavel Emelyanov Committed by Miklos Szeredi
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fuse: Linking file to inode helper 



When writeback is ON every writeable file should be in per-inode write list,
not only mmap-ed ones. Thus introduce a helper for this linkage.

Signed-off-by: default avatarMaxim Patlasov <MPatlasov@parallels.com>
Signed-off-by: default avatarPavel Emelyanov <xemul@openvz.org>
Signed-off-by: default avatarMiklos Szeredi <mszeredi@suse.cz>
parent 455c6fdb

fs/fuse/file.c

+19 −14
Original line number Diff line number Diff line
@@ -188,6 +188,22 @@ int fuse_do_open(struct fuse_conn *fc, u64 nodeid, struct file *file, 
}

EXPORT_SYMBOL_GPL(fuse_do_open);



static void fuse_link_write_file(struct file *file)

{

	struct inode *inode = file_inode(file);

	struct fuse_conn *fc = get_fuse_conn(inode);

	struct fuse_inode *fi = get_fuse_inode(inode);

	struct fuse_file *ff = file->private_data;

	/*

	 * file may be written through mmap, so chain it onto the

	 * inodes's write_file list

	 */

	spin_lock(&fc->lock);

	if (list_empty(&ff->write_entry))

		list_add(&ff->write_entry, &fi->write_files);

	spin_unlock(&fc->lock);

}



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

{

	struct fuse_file *ff = file->private_data;
@@ -1946,20 +1962,9 @@ static const struct vm_operations_struct fuse_file_vm_ops = { 


static int fuse_file_mmap(struct file *file, struct vm_area_struct *vma)

{

	if ((vma->vm_flags & VM_SHARED) && (vma->vm_flags & VM_MAYWRITE)) {

		struct inode *inode = file_inode(file);

		struct fuse_conn *fc = get_fuse_conn(inode);

		struct fuse_inode *fi = get_fuse_inode(inode);

		struct fuse_file *ff = file->private_data;

		/*

		 * file may be written through mmap, so chain it onto the

		 * inodes's write_file list

		 */

		spin_lock(&fc->lock);

		if (list_empty(&ff->write_entry))

			list_add(&ff->write_entry, &fi->write_files);

		spin_unlock(&fc->lock);

	}

	if ((vma->vm_flags & VM_SHARED) && (vma->vm_flags & VM_MAYWRITE))

		fuse_link_write_file(file);



	file_accessed(file);

	vma->vm_ops = &fuse_file_vm_ops;

	return 0;