fs/xfs/xfs_cap.h

   1 /*
   2  * Copyright (c) 2000-2002,2005 Silicon Graphics, Inc.
   3  * All Rights Reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it would be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write the Free Software Foundation,
  16  * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  17  */
  18 #ifndef __XFS_CAP_H__
  19 #define __XFS_CAP_H__
  20
  21 /*
  22  * Capabilities
  23  */
  24 typedef __uint64_t xfs_cap_value_t;
  25
  26 typedef struct xfs_cap_set {
  27         xfs_cap_value_t cap_effective;  /* use in capability checks */
  28         xfs_cap_value_t cap_permitted;  /* combined with file attrs */
  29         xfs_cap_value_t cap_inheritable;/* pass through exec */
  30 } xfs_cap_set_t;
  31
  32 /* On-disk XFS extended attribute names */
  33 #define SGI_CAP_FILE    "SGI_CAP_FILE"
  34 #define SGI_CAP_FILE_SIZE       (sizeof(SGI_CAP_FILE)-1)
  35 #define SGI_CAP_LINUX   "SGI_CAP_LINUX"
  36 #define SGI_CAP_LINUX_SIZE      (sizeof(SGI_CAP_LINUX)-1)
  37
  38 /*
  39  * For Linux, we take the bitfields directly from capability.h
  40  * and no longer attempt to keep this attribute ondisk compatible
  41  * with IRIX.  Since this attribute is only set on exectuables,
  42  * it just doesn't make much sense to try.  We do use a different
  43  * named attribute though, to avoid confusion.
  44  */
  45
  46 #ifdef __KERNEL__
  47
  48 #ifdef CONFIG_FS_POSIX_CAP
  49
  50 #include <linux/posix_cap_xattr.h>
  51
  52 struct vnode;
  53
  54 extern int xfs_cap_vhascap(struct vnode *);
  55 extern int xfs_cap_vset(struct vnode *, void *, size_t);
  56 extern int xfs_cap_vget(struct vnode *, void *, size_t);
  57 extern int xfs_cap_vremove(struct vnode *vp);
  58
  59 #define _CAP_EXISTS             xfs_cap_vhascap
  60
  61 #else
  62 #define xfs_cap_vset(v,p,sz)    (-EOPNOTSUPP)
  63 #define xfs_cap_vget(v,p,sz)    (-EOPNOTSUPP)
  64 #define xfs_cap_vremove(v)      (-EOPNOTSUPP)
  65 #define _CAP_EXISTS             (NULL)
  66 #endif
  67
  68 #endif  /* __KERNEL__ */
  69
  70 #endif  /* __XFS_CAP_H__ */