Initial import

1 files changed, 101 insertions, 0 deletions

diff --git a/fs/cifs/cifsacl.h b/fs/cifs/cifsacl.h
new file mode 100644
index 000000000..4f3884835
--- /dev/null
+++ b/fs/cifs/cifsacl.h
@@ -0,0 +1,101 @@
+/*
+ *   fs/cifs/cifsacl.h
+ *
+ *   Copyright (c) International Business Machines  Corp., 2007
+ *   Author(s): Steve French (sfrench@us.ibm.com)
+ *
+ *   This library is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU Lesser General Public License as published
+ *   by the Free Software Foundation; either version 2.1 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This library is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+ *   the GNU Lesser General Public License for more details.
+ *
+ *   You should have received a copy of the GNU Lesser General Public License
+ *   along with this library; if not, write to the Free Software
+ *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#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 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) * 3))
+
+/*
+ * 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));
+
+struct cifs_ace {
+	__u8 type;
+	__u8 flags;
+	__le16 size;
+	__le32 access_req;
+	struct cifs_sid sid; /* ie UUID of user or group who gets these perms */
+} __attribute__((packed));
+
+#endif /* _CIFSACL_H */