include/os/linux/spl/sys/user.h

   1 /*
   2  *  Copyright (C) 2015 Cluster Inc.
   3  *  Produced at ClusterHQ Inc (cf, DISCLAIMER).
   4  *  Written by Richard Yao <richard.yao@clusterhq.com>.
   5  *
   6  *  This file is part of the SPL, Solaris Porting Layer.
   7  *
   8  *  The SPL is free software; you can redistribute it and/or modify it
   9  *  under the terms of the GNU General Public License as published by the
  10  *  Free Software Foundation; either version 2 of the License, or (at your
  11  *  option) any later version.
  12  *
  13  *  The SPL is distributed in the hope that it will be useful, but WITHOUT
  14  *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  15  *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  16  *  for more details.
  17  *
  18  *  You should have received a copy of the GNU General Public License along
  19  *  with the SPL.  If not, see <http://www.gnu.org/licenses/>.
  20  */
  21
  22 #ifndef _SPL_USER_H
  23 #define _SPL_USER_H
  24
  25 /*
  26  * We have uf_info_t for areleasef(). We implement areleasef() using a global
  27  * linked list of all open file descriptors with the task structs referenced,
  28  * so accessing the correct descriptor from areleasef() only requires knowing
  29  * about the Linux task_struct. Since this is internal to our compatibility
  30  * layer, we make it an opaque type.
  31  *
  32  * XXX: If the descriptor changes under us and we do not do a getf() between
  33  * the change and using it, we would get an incorrect reference.
  34  */
  35
  36 struct uf_info;
  37 typedef struct uf_info uf_info_t;
  38
  39 #define P_FINFO(x) ((uf_info_t *)x)
  40
  41 #endif /* SPL_USER_H */