include/sys/cred.h

   1 /*****************************************************************************\
   2  *  Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC.
   3  *  Copyright (C) 2007 The Regents of the University of California.
   4  *  Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
   5  *  Written by Brian Behlendorf <behlendorf1@llnl.gov>.
   6  *  UCRL-CODE-235197
   7  *
   8  *  This file is part of the SPL, Solaris Porting Layer.
   9  *  For details, see <http://zfsonlinux.org/>.
  10  *
  11  *  The SPL is free software; you can redistribute it and/or modify it
  12  *  under the terms of the GNU General Public License as published by the
  13  *  Free Software Foundation; either version 2 of the License, or (at your
  14  *  option) any later version.
  15  *
  16  *  The SPL is distributed in the hope that it will be useful, but WITHOUT
  17  *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  18  *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  19  *  for more details.
  20  *
  21  *  You should have received a copy of the GNU General Public License along
  22  *  with the SPL.  If not, see <http://www.gnu.org/licenses/>.
  23 \*****************************************************************************/
  24
  25 #ifndef _SPL_CRED_H
  26 #define _SPL_CRED_H
  27
  28 #include <linux/module.h>
  29 #include <sys/types.h>
  30 #include <sys/vfs.h>
  31
  32 #ifdef HAVE_CRED_STRUCT
  33
  34 typedef struct cred cred_t;
  35
  36 #define kcred           ((cred_t *)(init_task.cred))
  37 #define CRED()          ((cred_t *)current_cred())
  38
  39 #else
  40
  41 typedef struct task_struct cred_t;
  42
  43 #define kcred           ((cred_t *)&init_task)
  44 #define CRED()          ((cred_t *)current)
  45
  46 #endif /* HAVE_CRED_STRUCT */
  47
  48 #ifdef HAVE_KUIDGID_T
  49
  50  /*
  51   * Linux 3.8+ uses typedefs to redefine uid_t and gid_t. We have to rename the
  52   * typedefs to recover the original types. We then can use them provided that
  53   * we are careful about translating from k{g,u}id_t to the original versions
  54   * and vice versa.
  55   */
  56  #define uid_t xuid_t
  57  #define gid_t xgid_t
  58  #include <linux/uidgid.h>
  59  #undef uid_t
  60  #undef gid_t
  61
  62  #define KUID_TO_SUID(x) (__kuid_val(x))
  63  #define KGID_TO_SGID(x) (__kgid_val(x))
  64  #define SUID_TO_KUID(x) (KUIDT_INIT(x))
  65  #define SGID_TO_KGID(x) (KGIDT_INIT(x))
  66  #define KGIDP_TO_SGIDP(x) (&(x)->val)
  67
  68 #else /* HAVE_KUIDGID_T */
  69
  70  #define KUID_TO_SUID(x) (x)
  71  #define KGID_TO_SGID(x) (x)
  72  #define SUID_TO_KUID(x) (x)
  73  #define SGID_TO_KGID(x) (x)
  74  #define KGIDP_TO_SGIDP(x) (x)
  75
  76 #endif /* HAVE_KUIDGID_T */
  77
  78 extern void crhold(cred_t *cr);
  79 extern void crfree(cred_t *cr);
  80 extern uid_t crgetuid(const cred_t *cr);
  81 extern uid_t crgetruid(const cred_t *cr);
  82 extern uid_t crgetsuid(const cred_t *cr);
  83 extern uid_t crgetfsuid(const cred_t *cr);
  84 extern gid_t crgetgid(const cred_t *cr);
  85 extern gid_t crgetrgid(const cred_t *cr);
  86 extern gid_t crgetsgid(const cred_t *cr);
  87 extern gid_t crgetfsgid(const cred_t *cr);
  88 extern int crgetngroups(const cred_t *cr);
  89 extern gid_t * crgetgroups(const cred_t *cr);
  90 extern int groupmember(gid_t gid, const cred_t *cr);
  91
  92 #endif  /* _SPL_CRED_H */