1 files changed, 110 insertions, 0 deletions
diff --git a/fs/smb/client/cifsacl.h b/fs/smb/client/cifsacl.h
new file mode 100644
index 000000000000..31b51a8fc256
--- /dev/null
+++ b/fs/smb/client/cifsacl.h
@@ -0,0 +1,110 @@
+/* SPDX-License-Identifier: LGPL-2.1 */
+/*
+ *
+ *   Copyright (c) International Business Machines  Corp., 2007
+ *   Author(s): Steve French (sfrench@us.ibm.com)
+ *
+ */
+
+#ifndef _CIFSACL_H
+#define _CIFSACL_H
+
+#include "../common/smbacl.h"
+
+#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
+
+/*
+ * Security Descriptor length containing DACL with 3 ACEs (one each for
+ * owner, group and world).
+ */
+#define DEFAULT_SEC_DESC_LEN (sizeof(struct smb_ntsd) + \
+			      sizeof(struct smb_acl) + \
+			      (sizeof(struct smb_ace) * 4))
+
+/*
+ * 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 inheritance */
+#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 smb_ntsd) + (2 * MIN_SID_LEN))
+
+#endif /* _CIFSACL_H */