fs/9p/fid.h

   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 as published by
   8  *  the Free Software Foundation; either version 2 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, write to:
  18  *  Free Software Foundation
  19  *  51 Franklin Street, Fifth Floor
  20  *  Boston, MA  02111-1301  USA
  21  *
  22  */
  23
  24 #include <linux/list.h>
  25
  26 #define FID_OP   0
  27 #define FID_WALK 1
  28 #define FID_CREATE 2
  29
  30 struct v9fs_fid {
  31         struct list_head list;   /* list of fids associated with a dentry */
  32         struct list_head active; /* XXX - debug */
  33
  34         u32 fid;
  35         unsigned char fidopen;    /* set when fid is opened */
  36         unsigned char fidcreate;  /* set when fid was just created */
  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         pid_t pid;              /* thread associated with this fid */
  49         uid_t uid;              /* user associated with this fid */
  50
  51         /* private data */
  52         struct file *filp;      /* backpointer to File struct for open files */
  53         struct v9fs_session_info *v9ses;        /* session info for this FID */
  54 };
  55
  56 struct v9fs_fid *v9fs_fid_lookup(struct dentry *dentry);
  57 struct v9fs_fid *v9fs_fid_get_created(struct dentry *);
  58 void v9fs_fid_destroy(struct v9fs_fid *fid);
  59 struct v9fs_fid *v9fs_fid_create(struct dentry *,
  60         struct v9fs_session_info *v9ses, int fid, int create);