mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-01 08:04:22 +08:00
929be906fa
Add SPDX license identifier and replace license boilerplate. Corrects various checkpatch errors with the older format for noting the LGPL license. Signed-off-by: Steve French <stfrench@microsoft.com>
201 lines
6.2 KiB
C
201 lines
6.2 KiB
C
/* SPDX-License-Identifier: LGPL-2.1 */
|
|
/*
|
|
* fs/cifs/cifsacl.h
|
|
*
|
|
* Copyright (c) International Business Machines Corp., 2007
|
|
* Author(s): Steve French (sfrench@us.ibm.com)
|
|
*
|
|
*/
|
|
|
|
#ifndef _CIFSACL_H
|
|
#define _CIFSACL_H
|
|
|
|
#define NUM_AUTHS (6) /* number of authority fields */
|
|
#define SID_MAX_SUB_AUTHORITIES (15) /* max number of sub authority fields */
|
|
|
|
#define READ_BIT 0x4
|
|
#define WRITE_BIT 0x2
|
|
#define EXEC_BIT 0x1
|
|
|
|
#define ACL_OWNER_MASK 0700
|
|
#define ACL_GROUP_MASK 0070
|
|
#define ACL_EVERYONE_MASK 0007
|
|
|
|
#define UBITSHIFT 6
|
|
#define GBITSHIFT 3
|
|
|
|
#define ACCESS_ALLOWED 0
|
|
#define ACCESS_DENIED 1
|
|
|
|
#define SIDOWNER 1
|
|
#define SIDGROUP 2
|
|
|
|
/*
|
|
* Security Descriptor length containing DACL with 3 ACEs (one each for
|
|
* owner, group and world).
|
|
*/
|
|
#define DEFAULT_SEC_DESC_LEN (sizeof(struct cifs_ntsd) + \
|
|
sizeof(struct cifs_acl) + \
|
|
(sizeof(struct cifs_ace) * 4))
|
|
|
|
/*
|
|
* Maximum size of a string representation of a SID:
|
|
*
|
|
* The fields are unsigned values in decimal. So:
|
|
*
|
|
* u8: max 3 bytes in decimal
|
|
* u32: max 10 bytes in decimal
|
|
*
|
|
* "S-" + 3 bytes for version field + 15 for authority field + NULL terminator
|
|
*
|
|
* For authority field, max is when all 6 values are non-zero and it must be
|
|
* represented in hex. So "-0x" + 12 hex digits.
|
|
*
|
|
* Add 11 bytes for each subauthority field (10 bytes each + 1 for '-')
|
|
*/
|
|
#define SID_STRING_BASE_SIZE (2 + 3 + 15 + 1)
|
|
#define SID_STRING_SUBAUTH_SIZE (11) /* size of a single subauth string */
|
|
|
|
struct cifs_ntsd {
|
|
__le16 revision; /* revision level */
|
|
__le16 type;
|
|
__le32 osidoffset;
|
|
__le32 gsidoffset;
|
|
__le32 sacloffset;
|
|
__le32 dacloffset;
|
|
} __attribute__((packed));
|
|
|
|
struct cifs_sid {
|
|
__u8 revision; /* revision level */
|
|
__u8 num_subauth;
|
|
__u8 authority[NUM_AUTHS];
|
|
__le32 sub_auth[SID_MAX_SUB_AUTHORITIES]; /* sub_auth[num_subauth] */
|
|
} __attribute__((packed));
|
|
|
|
/* size of a struct cifs_sid, sans sub_auth array */
|
|
#define CIFS_SID_BASE_SIZE (1 + 1 + NUM_AUTHS)
|
|
|
|
struct cifs_acl {
|
|
__le16 revision; /* revision level */
|
|
__le16 size;
|
|
__le32 num_aces;
|
|
} __attribute__((packed));
|
|
|
|
/* ACE types - see MS-DTYP 2.4.4.1 */
|
|
#define ACCESS_ALLOWED_ACE_TYPE 0x00
|
|
#define ACCESS_DENIED_ACE_TYPE 0x01
|
|
#define SYSTEM_AUDIT_ACE_TYPE 0x02
|
|
#define SYSTEM_ALARM_ACE_TYPE 0x03
|
|
#define ACCESS_ALLOWED_COMPOUND_ACE_TYPE 0x04
|
|
#define ACCESS_ALLOWED_OBJECT_ACE_TYPE 0x05
|
|
#define ACCESS_DENIED_OBJECT_ACE_TYPE 0x06
|
|
#define SYSTEM_AUDIT_OBJECT_ACE_TYPE 0x07
|
|
#define SYSTEM_ALARM_OBJECT_ACE_TYPE 0x08
|
|
#define ACCESS_ALLOWED_CALLBACK_ACE_TYPE 0x09
|
|
#define ACCESS_DENIED_CALLBACK_ACE_TYPE 0x0A
|
|
#define ACCESS_ALLOWED_CALLBACK_OBJECT_ACE_TYPE 0x0B
|
|
#define ACCESS_DENIED_CALLBACK_OBJECT_ACE_TYPE 0x0C
|
|
#define SYSTEM_AUDIT_CALLBACK_ACE_TYPE 0x0D
|
|
#define SYSTEM_ALARM_CALLBACK_ACE_TYPE 0x0E /* Reserved */
|
|
#define SYSTEM_AUDIT_CALLBACK_OBJECT_ACE_TYPE 0x0F
|
|
#define SYSTEM_ALARM_CALLBACK_OBJECT_ACE_TYPE 0x10 /* reserved */
|
|
#define SYSTEM_MANDATORY_LABEL_ACE_TYPE 0x11
|
|
#define SYSTEM_RESOURCE_ATTRIBUTE_ACE_TYPE 0x12
|
|
#define SYSTEM_SCOPED_POLICY_ID_ACE_TYPE 0x13
|
|
|
|
/* ACE flags */
|
|
#define OBJECT_INHERIT_ACE 0x01
|
|
#define CONTAINER_INHERIT_ACE 0x02
|
|
#define NO_PROPAGATE_INHERIT_ACE 0x04
|
|
#define INHERIT_ONLY_ACE 0x08
|
|
#define INHERITED_ACE 0x10
|
|
#define SUCCESSFUL_ACCESS_ACE_FLAG 0x40
|
|
#define FAILED_ACCESS_ACE_FLAG 0x80
|
|
|
|
struct cifs_ace {
|
|
__u8 type; /* see above and MS-DTYP 2.4.4.1 */
|
|
__u8 flags;
|
|
__le16 size;
|
|
__le32 access_req;
|
|
struct cifs_sid sid; /* ie UUID of user or group who gets these perms */
|
|
} __attribute__((packed));
|
|
|
|
/*
|
|
* The current SMB3 form of security descriptor is similar to what was used for
|
|
* cifs (see above) but some fields are split, and fields in the struct below
|
|
* matches names of fields to the spec, MS-DTYP (see sections 2.4.5 and
|
|
* 2.4.6). Note that "CamelCase" fields are used in this struct in order to
|
|
* match the MS-DTYP and MS-SMB2 specs which define the wire format.
|
|
*/
|
|
struct smb3_sd {
|
|
__u8 Revision; /* revision level, MUST be one */
|
|
__u8 Sbz1; /* only meaningful if 'RM' flag set below */
|
|
__le16 Control;
|
|
__le32 OffsetOwner;
|
|
__le32 OffsetGroup;
|
|
__le32 OffsetSacl;
|
|
__le32 OffsetDacl;
|
|
} __packed;
|
|
|
|
/* Meaning of 'Control' field flags */
|
|
#define ACL_CONTROL_SR 0x8000 /* Self relative */
|
|
#define ACL_CONTROL_RM 0x4000 /* Resource manager control bits */
|
|
#define ACL_CONTROL_PS 0x2000 /* SACL protected from inherits */
|
|
#define ACL_CONTROL_PD 0x1000 /* DACL protected from inherits */
|
|
#define ACL_CONTROL_SI 0x0800 /* SACL Auto-Inherited */
|
|
#define ACL_CONTROL_DI 0x0400 /* DACL Auto-Inherited */
|
|
#define ACL_CONTROL_SC 0x0200 /* SACL computed through inheritance */
|
|
#define ACL_CONTROL_DC 0x0100 /* DACL computed through inheritence */
|
|
#define ACL_CONTROL_SS 0x0080 /* Create server ACL */
|
|
#define ACL_CONTROL_DT 0x0040 /* DACL provided by trusted source */
|
|
#define ACL_CONTROL_SD 0x0020 /* SACL defaulted */
|
|
#define ACL_CONTROL_SP 0x0010 /* SACL is present on object */
|
|
#define ACL_CONTROL_DD 0x0008 /* DACL defaulted */
|
|
#define ACL_CONTROL_DP 0x0004 /* DACL is present on object */
|
|
#define ACL_CONTROL_GD 0x0002 /* Group was defaulted */
|
|
#define ACL_CONTROL_OD 0x0001 /* User was defaulted */
|
|
|
|
/* Meaning of AclRevision flags */
|
|
#define ACL_REVISION 0x02 /* See section 2.4.4.1 of MS-DTYP */
|
|
#define ACL_REVISION_DS 0x04 /* Additional AceTypes allowed */
|
|
|
|
struct smb3_acl {
|
|
u8 AclRevision; /* revision level */
|
|
u8 Sbz1; /* MBZ */
|
|
__le16 AclSize;
|
|
__le16 AceCount;
|
|
__le16 Sbz2; /* MBZ */
|
|
} __packed;
|
|
|
|
/*
|
|
* Used to store the special 'NFS SIDs' used to persist the POSIX uid and gid
|
|
* See http://technet.microsoft.com/en-us/library/hh509017(v=ws.10).aspx
|
|
*/
|
|
struct owner_sid {
|
|
u8 Revision;
|
|
u8 NumAuth;
|
|
u8 Authority[6];
|
|
__le32 SubAuthorities[3];
|
|
} __packed;
|
|
|
|
struct owner_group_sids {
|
|
struct owner_sid owner;
|
|
struct owner_sid group;
|
|
} __packed;
|
|
|
|
/*
|
|
* Minimum security identifier can be one for system defined Users
|
|
* and Groups such as NULL SID and World or Built-in accounts such
|
|
* as Administrator and Guest and consists of
|
|
* Revision + Num (Sub)Auths + Authority + Domain (one Subauthority)
|
|
*/
|
|
#define MIN_SID_LEN (1 + 1 + 6 + 4) /* in bytes */
|
|
|
|
/*
|
|
* Minimum security descriptor can be one without any SACL and DACL and can
|
|
* consist of revision, type, and two sids of minimum size for owner and group
|
|
*/
|
|
#define MIN_SEC_DESC_LEN (sizeof(struct cifs_ntsd) + (2 * MIN_SID_LEN))
|
|
|
|
#endif /* _CIFSACL_H */
|