/* * V9FS FID Management * * Copyright (C) 2005 by Eric Van Hensbergen <ericvh@gmail.com> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 * as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to: * Free Software Foundation * 51 Franklin Street, Fifth Floor * Boston, MA 02111-1301 USA * */ #include <linux/list.h> #define FID_OP 0 #define FID_WALK 1 #define FID_CREATE 2 struct v9fs_fid { struct list_head list; /* list of fids associated with a dentry */ struct list_head active; /* XXX - debug */ struct semaphore lock; u32 fid; unsigned char fidopen; /* set when fid is opened */ unsigned char fidclunked; /* set when fid has already been clunked */ struct v9fs_qid qid; u32 iounit; /* readdir stuff */ int rdir_fpos; loff_t rdir_pos; struct v9fs_fcall *rdir_fcall; /* management stuff */ uid_t uid; /* user associated with this fid */ /* private data */ struct file *filp; /* backpointer to File struct for open files */ struct v9fs_session_info *v9ses; /* session info for this FID */ }; struct v9fs_fid *v9fs_fid_lookup(struct dentry *dentry); struct v9fs_fid *v9fs_fid_get_created(struct dentry *); void v9fs_fid_destroy(struct v9fs_fid *fid); struct v9fs_fid *v9fs_fid_create(struct v9fs_session_info *, int fid); int v9fs_fid_insert(struct v9fs_fid *fid, struct dentry *dentry); struct v9fs_fid *v9fs_fid_clone(struct dentry *dentry); void v9fs_fid_clunk(struct v9fs_session_info *v9ses, struct v9fs_fid *fid);