1/* SPDX-License-Identifier: LGPL-2.1 */
2/*
3 *
4 * Copyright (c) International Business Machines Corp., 2007
5 * Author(s): Steve French (sfrench@us.ibm.com)
6 *
7 */
8
9#ifndef _CIFSACL_H
10#define _CIFSACL_H
11
12#include "../common/smbacl.h"
13
14#define READ_BIT 0x4
15#define WRITE_BIT 0x2
16#define EXEC_BIT 0x1
17
18#define ACL_OWNER_MASK 0700
19#define ACL_GROUP_MASK 0070
20#define ACL_EVERYONE_MASK 0007
21
22#define UBITSHIFT 6
23#define GBITSHIFT 3
24
25/*
26 * Security Descriptor length containing DACL with 3 ACEs (one each for
27 * owner, group and world).
28 */
29#define DEFAULT_SEC_DESC_LEN (sizeof(struct smb_ntsd) + \
30 sizeof(struct smb_acl) + \
31 (sizeof(struct smb_ace) * 4))
32
33/*
34 * The current SMB3 form of security descriptor is similar to what was used for
35 * cifs (see above) but some fields are split, and fields in the struct below
36 * matches names of fields to the spec, MS-DTYP (see sections 2.4.5 and
37 * 2.4.6). Note that "CamelCase" fields are used in this struct in order to
38 * match the MS-DTYP and MS-SMB2 specs which define the wire format.
39 */
40struct smb3_sd {
41 __u8 Revision; /* revision level, MUST be one */
42 __u8 Sbz1; /* only meaningful if 'RM' flag set below */
43 __le16 Control;
44 __le32 OffsetOwner;
45 __le32 OffsetGroup;
46 __le32 OffsetSacl;
47 __le32 OffsetDacl;
48} __packed;
49
50/* Meaning of 'Control' field flags */
51#define ACL_CONTROL_SR 0x8000 /* Self relative */
52#define ACL_CONTROL_RM 0x4000 /* Resource manager control bits */
53#define ACL_CONTROL_PS 0x2000 /* SACL protected from inherits */
54#define ACL_CONTROL_PD 0x1000 /* DACL protected from inherits */
55#define ACL_CONTROL_SI 0x0800 /* SACL Auto-Inherited */
56#define ACL_CONTROL_DI 0x0400 /* DACL Auto-Inherited */
57#define ACL_CONTROL_SC 0x0200 /* SACL computed through inheritance */
58#define ACL_CONTROL_DC 0x0100 /* DACL computed through inheritance */
59#define ACL_CONTROL_SS 0x0080 /* Create server ACL */
60#define ACL_CONTROL_DT 0x0040 /* DACL provided by trusted source */
61#define ACL_CONTROL_SD 0x0020 /* SACL defaulted */
62#define ACL_CONTROL_SP 0x0010 /* SACL is present on object */
63#define ACL_CONTROL_DD 0x0008 /* DACL defaulted */
64#define ACL_CONTROL_DP 0x0004 /* DACL is present on object */
65#define ACL_CONTROL_GD 0x0002 /* Group was defaulted */
66#define ACL_CONTROL_OD 0x0001 /* User was defaulted */
67
68/* Meaning of AclRevision flags */
69#define ACL_REVISION 0x02 /* See section 2.4.4.1 of MS-DTYP */
70#define ACL_REVISION_DS 0x04 /* Additional AceTypes allowed */
71
72struct smb3_acl {
73 u8 AclRevision; /* revision level */
74 u8 Sbz1; /* MBZ */
75 __le16 AclSize;
76 __le16 AceCount;
77 __le16 Sbz2; /* MBZ */
78} __packed;
79
80/*
81 * Used to store the special 'NFS SIDs' used to persist the POSIX uid and gid
82 * See http://technet.microsoft.com/en-us/library/hh509017(v=ws.10).aspx
83 */
84struct owner_sid {
85 u8 Revision;
86 u8 NumAuth;
87 u8 Authority[6];
88 __le32 SubAuthorities[3];
89} __packed;
90
91struct owner_group_sids {
92 struct owner_sid owner;
93 struct owner_sid group;
94} __packed;
95
96/*
97 * Minimum security identifier can be one for system defined Users
98 * and Groups such as NULL SID and World or Built-in accounts such
99 * as Administrator and Guest and consists of
100 * Revision + Num (Sub)Auths + Authority + Domain (one Subauthority)
101 */
102#define MIN_SID_LEN (1 + 1 + 6 + 4) /* in bytes */
103
104/*
105 * Minimum security descriptor can be one without any SACL and DACL and can
106 * consist of revision, type, and two sids of minimum size for owner and group
107 */
108#define MIN_SEC_DESC_LEN (sizeof(struct smb_ntsd) + (2 * MIN_SID_LEN))
109
110#endif /* _CIFSACL_H */
111

source code of linux/fs/smb/client/cifsacl.h