1 /* 2 * V9FS FID Management 3 * 4 * Copyright (C) 2005 by Eric Van Hensbergen <ericvh@gmail.com> 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License version 2 8 * as published by the Free Software Foundation. 9 * 10 * This program is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 * GNU General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License 16 * along with this program; if not, write to: 17 * Free Software Foundation 18 * 51 Franklin Street, Fifth Floor 19 * Boston, MA 02111-1301 USA 20 * 21 */ 22 23 #include <linux/list.h> 24 25 #define FID_OP 0 26 #define FID_WALK 1 27 #define FID_CREATE 2 28 29 struct v9fs_fid { 30 struct list_head list; /* list of fids associated with a dentry */ 31 struct list_head active; /* XXX - debug */ 32 33 struct semaphore lock; 34 35 u32 fid; 36 unsigned char fidopen; /* set when fid is opened */ 37 unsigned char fidclunked; /* set when fid has already been clunked */ 38 39 struct v9fs_qid qid; 40 u32 iounit; 41 42 /* readdir stuff */ 43 int rdir_fpos; 44 loff_t rdir_pos; 45 struct v9fs_fcall *rdir_fcall; 46 47 /* management stuff */ 48 uid_t uid; /* user associated with this fid */ 49 50 /* private data */ 51 struct file *filp; /* backpointer to File struct for open files */ 52 struct v9fs_session_info *v9ses; /* session info for this FID */ 53 }; 54 55 struct v9fs_fid *v9fs_fid_lookup(struct dentry *dentry); 56 struct v9fs_fid *v9fs_fid_get_created(struct dentry *); 57 void v9fs_fid_destroy(struct v9fs_fid *fid); 58 struct v9fs_fid *v9fs_fid_create(struct v9fs_session_info *, int fid); 59 int v9fs_fid_insert(struct v9fs_fid *fid, struct dentry *dentry); 60 struct v9fs_fid *v9fs_fid_clone(struct dentry *dentry); 61 void v9fs_fid_clunk(struct v9fs_session_info *v9ses, struct v9fs_fid *fid); 62 63