[SMB3] Add missing ACL related defines
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Message ID CAH2r5mtL=To4MtqaGXPghuLgQxh94nh=wputDhTfGh-n3s3-DQ@mail.gmail.com
State New
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  • [SMB3] Add missing ACL related defines
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Commit Message

Steve French Sept. 26, 2019, 9:48 a.m. UTC
Various missing defines needed for SMB3 security descriptors (see MS-DTYP)

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From a370f651cc9997020fac815c7f4442c34f5eea35 Mon Sep 17 00:00:00 2001
From: Steve French <stfrench@microsoft.com>
Date: Thu, 26 Sep 2019 04:37:18 -0500
Subject: [PATCH] smb3: missing ACL related flags

Various SMB3 ACL related flags (for security descriptor and
ACEs for example) were missing and some fields are different
in SMB3 and CIFS. Update cifsacl.h definitions based on
current MS-DTYP specification.

Signed-off-by: Steve French <stfrench@microsoft.com>
---
 fs/cifs/cifsacl.h | 81 ++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 80 insertions(+), 1 deletion(-)

diff --git a/fs/cifs/cifsacl.h b/fs/cifs/cifsacl.h
index eb428349f29a..73fe2f1a16da 100644
--- a/fs/cifs/cifsacl.h
+++ b/fs/cifs/cifsacl.h
@@ -90,14 +90,93 @@  struct cifs_acl {
 	__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;
+	__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 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	0x0001	/* Self relative */
+#define ACL_CONTROL_RM	0x0002	/* Resource manager control bits */
+#define ACL_CONTROL_PS	0x0004	/* SACL protected from inherits */
+#define ACL_CONTROL_PD	0x0008	/* DACL protected from inherits */
+#define ACL_CONTROL_SI	0x0010	/* SACL Auto-Inherited */
+#define ACL_CONTROL_DI	0x0020	/* DACL Auto-Inherited */
+#define ACL_CONTROL_SC	0x0040	/* SACL computed through inheritance */
+#define ACL_CONTROL_DC	0x0080	/* DACL computed through inheritence */
+#define ACL_CONTROL_SS	0x0100	/* Create server ACL */
+#define ACL_CONTROL_DT	0x0200	/* DACL provided by trusteed source */
+#define ACL_CONTROL_SD	0x0400	/* SACL defaulted */
+#define ACL_CONTROL_SP	0x0800	/* SACL is present on object */
+#define ACL_CONTROL_DD	0x1000	/* DACL defaulted */
+#define ACL_CONTROL_DP	0x2000	/* DACL is present on object */
+#define ACL_CONTROL_GD	0x4000	/* Group was defaulted */
+#define ACL_CONTROL_OD	0x8000	/* 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;
+
+
 /*
  * Minimum security identifier can be one for system defined Users
  * and Groups such as NULL SID and World or Built-in accounts such
-- 
2.20.1