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 typedef struct cred cred_t;
  33
  34 #define kcred           ((cred_t *)(init_task.cred))
  35 #define CRED()          ((cred_t *)current_cred())
  36
  37 /* Linux 4.9 API change, GROUP_AT was removed */
  38 #ifndef GROUP_AT
  39 #define GROUP_AT(gi, i) ((gi)->gid[i])
  40 #endif
  41
  42 #ifdef HAVE_KUIDGID_T
  43
  44 /*
  45  * Linux 3.8+ uses typedefs to redefine uid_t and gid_t. We have to rename the
  46  * typedefs to recover the original types. We then can use them provided that
  47  * we are careful about translating from k{g,u}id_t to the original versions
  48  * and vice versa.
  49  */
  50 #define uid_t           xuid_t
  51 #define gid_t           xgid_t
  52 #include <linux/uidgid.h>
  53 #undef uid_t
  54 #undef gid_t
  55
  56 #define KUID_TO_SUID(x)         (__kuid_val(x))
  57 #define KGID_TO_SGID(x)         (__kgid_val(x))
  58 #define SUID_TO_KUID(x)         (KUIDT_INIT(x))
  59 #define SGID_TO_KGID(x)         (KGIDT_INIT(x))
  60 #define KGIDP_TO_SGIDP(x)       (&(x)->val)
  61
  62 #else /* HAVE_KUIDGID_T */
  63
  64 #define KUID_TO_SUID(x)         (x)
  65 #define KGID_TO_SGID(x)         (x)
  66 #define SUID_TO_KUID(x)         (x)
  67 #define SGID_TO_KGID(x)         (x)
  68 #define KGIDP_TO_SGIDP(x)       (x)
  69
  70 #endif /* HAVE_KUIDGID_T */
  71
  72 extern void crhold(cred_t *cr);
  73 extern void crfree(cred_t *cr);
  74 extern uid_t crgetuid(const cred_t *cr);
  75 extern uid_t crgetruid(const cred_t *cr);
  76 extern uid_t crgetsuid(const cred_t *cr);
  77 extern uid_t crgetfsuid(const cred_t *cr);
  78 extern gid_t crgetgid(const cred_t *cr);
  79 extern gid_t crgetrgid(const cred_t *cr);
  80 extern gid_t crgetsgid(const cred_t *cr);
  81 extern gid_t crgetfsgid(const cred_t *cr);
  82 extern int crgetngroups(const cred_t *cr);
  83 extern gid_t * crgetgroups(const cred_t *cr);
  84 extern int groupmember(gid_t gid, const cred_t *cr);
  85
  86 #endif  /* _SPL_CRED_H */