lustre/include/lustre_eacl.h

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   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 version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  */
  30 /*
  31  * Copyright (c) 2012, Intel Corporation.
  32  */
  33 /*
  34  * This file is part of Lustre, http://www.lustre.org/
  35  * Lustre is a trademark of Sun Microsystems, Inc.
  36  *
  37  * lustre/lustre/include/lustre_idmap.h
  38  *
  39  * MDS data structures.
  40  * See also lustre_idl.h for wire formats of requests.
  41  */
  42
  43 #ifndef _LUSTRE_EACL_H
  44 #define _LUSTRE_EACL_H
  45
  46 /** \defgroup eacl eacl
  47  *
  48  * @{
  49  */
  50
  51 #ifdef CONFIG_FS_POSIX_ACL
  52
  53 #include <linux/posix_acl_xattr.h>
  54
  55 typedef struct {
  56         __u16                   e_tag;
  57         __u16                   e_perm;
  58         __u32                   e_id;
  59         __u32                   e_stat;
  60 } ext_acl_xattr_entry;
  61
  62 typedef struct {
  63         __u32                   a_count;
  64         ext_acl_xattr_entry     a_entries[0];
  65 } ext_acl_xattr_header;
  66
  67 #define CFS_ACL_XATTR_SIZE(count, prefix) \
  68         (sizeof(prefix ## _header) + (count) * sizeof(prefix ## _entry))
  69
  70 #define CFS_ACL_XATTR_COUNT(size, prefix) \
  71         (((size) - sizeof(prefix ## _header)) / sizeof(prefix ## _entry))
  72
  73 #ifdef HAVE_SERVER_SUPPORT
  74 struct lu_ucred;
  75 struct lu_attr;
  76 struct lustre_idmap_table;
  77
  78 extern int lustre_posix_acl_permission(struct lu_ucred *mu,
  79                                         const struct lu_attr *la, int want,
  80                                         posix_acl_xattr_entry *entry,
  81                                         int count);
  82 extern int lustre_posix_acl_chmod_masq(posix_acl_xattr_entry *entry,
  83                                        __u32 mode, int count);
  84 extern int lustre_posix_acl_create_masq(posix_acl_xattr_entry *entry,
  85                                         __u32 *pmode, int count);
  86 extern int lustre_posix_acl_equiv_mode(posix_acl_xattr_entry *entry, mode_t *mode_p,
  87                                        int count);
  88
  89 extern int
  90 lustre_posix_acl_xattr_id2client(struct lu_ucred *mu,
  91                                  struct lustre_idmap_table *t,
  92                                  posix_acl_xattr_header *header,
  93                                  int size, int flags);
  94
  95 extern int
  96 lustre_ext_acl_xattr_id2server(struct lu_ucred *mu,
  97                                struct lustre_idmap_table *t,
  98                                ext_acl_xattr_header *header);
  99 #endif /* HAVE_SERVER_SUPPORT */
 100
 101 extern ext_acl_xattr_header *
 102 lustre_posix_acl_xattr_2ext(posix_acl_xattr_header *header, int size);
 103 extern int
 104 lustre_posix_acl_xattr_filter(posix_acl_xattr_header *header, int size,
 105                               posix_acl_xattr_header **out);
 106 extern void
 107 lustre_posix_acl_xattr_free(posix_acl_xattr_header *header, int size);
 108 extern void
 109 lustre_ext_acl_xattr_free(ext_acl_xattr_header *header);
 110 extern int
 111 lustre_acl_xattr_merge2posix(posix_acl_xattr_header *posix_header, int size,
 112                              ext_acl_xattr_header *ext_header,
 113                              posix_acl_xattr_header **out);
 114 extern ext_acl_xattr_header *
 115 lustre_acl_xattr_merge2ext(posix_acl_xattr_header *posix_header, int size,
 116                            ext_acl_xattr_header *ext_header);
 117
 118 #endif /* CONFIG_FS_POSIX_ACL */
 119
 120 /** @} eacl */
 121
 122 #endif