Commit d09cb9d7 authored by Miklos Szeredi's avatar Miklos Szeredi
Browse files

fuse: prepare fuse_direct_io() for CUSE 



Move code operating on the inode out from fuse_direct_io().

This prepares this function for use by CUSE, where the inode is not
owned by a fuse filesystem.

Signed-off-by: default avatarMiklos Szeredi <mszeredi@suse.cz>
parent 2d698b07

fs/fuse/file.c

+23 −10
Original line number Diff line number Diff line
@@ -993,9 +993,6 @@ static ssize_t fuse_direct_io(struct file *file, const char __user *buf, 
	ssize_t res = 0;

	struct fuse_req *req;



	if (is_bad_inode(inode))

		return -EIO;



	req = fuse_get_req(fc);

	if (IS_ERR(req))

		return PTR_ERR(req);
@@ -1038,12 +1035,8 @@ static ssize_t fuse_direct_io(struct file *file, const char __user *buf, 
		}

	}

	fuse_put_request(fc, req);

	if (res > 0) {

		if (write)

			fuse_write_update_size(inode, pos);

	if (res > 0)

		*ppos = pos;

	}

	fuse_invalidate_attr(inode);



	return res;

}
@@ -1051,7 +1044,17 @@ static ssize_t fuse_direct_io(struct file *file, const char __user *buf, 
static ssize_t fuse_direct_read(struct file *file, char __user *buf,

				     size_t count, loff_t *ppos)

{

	return fuse_direct_io(file, buf, count, ppos, 0);

	ssize_t res;

	struct inode *inode = file->f_path.dentry->d_inode;



	if (is_bad_inode(inode))

		return -EIO;



	res = fuse_direct_io(file, buf, count, ppos, 0);



	fuse_invalidate_attr(inode);



	return res;

}



static ssize_t fuse_direct_write(struct file *file, const char __user *buf,
@@ -1059,12 +1062,22 @@ static ssize_t fuse_direct_write(struct file *file, const char __user *buf, 
{

	struct inode *inode = file->f_path.dentry->d_inode;

	ssize_t res;



	if (is_bad_inode(inode))

		return -EIO;



	/* Don't allow parallel writes to the same file */

	mutex_lock(&inode->i_mutex);

	res = generic_write_checks(file, ppos, &count, 0);

	if (!res)

	if (!res) {

		res = fuse_direct_io(file, buf, count, ppos, 1);

		if (res > 0)

			fuse_write_update_size(inode, *ppos);

	}

	mutex_unlock(&inode->i_mutex);



	fuse_invalidate_attr(inode);



	return res;

}