CIFS: Request SMB2.1 leases
if server supports them and we need oplocks.
Signed-off-by: Pavel Shilovsky <piastryyy@gmail.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
diff --git a/fs/cifs/smb2pdu.h b/fs/cifs/smb2pdu.h
index 889ee5e..e818a5c 100644
--- a/fs/cifs/smb2pdu.h
+++ b/fs/cifs/smb2pdu.h
@@ -150,6 +150,10 @@
__u8 ErrorData[1]; /* variable length */
} __packed;
+#define SMB2_CLIENT_GUID_SIZE 16
+
+extern __u8 cifs_client_guid[SMB2_CLIENT_GUID_SIZE];
+
struct smb2_negotiate_req {
struct smb2_hdr hdr;
__le16 StructureSize; /* Must be 36 */
@@ -157,7 +161,7 @@
__le16 SecurityMode;
__le16 Reserved; /* MBZ */
__le32 Capabilities;
- __u8 ClientGUID[16]; /* MBZ */
+ __u8 ClientGUID[SMB2_CLIENT_GUID_SIZE];
__le64 ClientStartTime; /* MBZ */
__le16 Dialects[2]; /* variable length */
} __packed;
@@ -307,6 +311,8 @@
#define SMB2_OPLOCK_LEVEL_EXCLUSIVE 0x08
#define SMB2_OPLOCK_LEVEL_BATCH 0x09
#define SMB2_OPLOCK_LEVEL_LEASE 0xFF
+/* Non-spec internal type */
+#define SMB2_OPLOCK_LEVEL_NOCHANGE 0x99
/* Desired Access Flags */
#define FILE_READ_DATA_LE cpu_to_le32(0x00000001)
@@ -404,7 +410,7 @@
__le16 NameLength;
__le32 CreateContextsOffset;
__le32 CreateContextsLength;
- __u8 Buffer[1];
+ __u8 Buffer[8];
} __packed;
struct smb2_create_rsp {
@@ -428,6 +434,39 @@
__u8 Buffer[1];
} __packed;
+struct create_context {
+ __le32 Next;
+ __le16 NameOffset;
+ __le16 NameLength;
+ __le16 Reserved;
+ __le16 DataOffset;
+ __le32 DataLength;
+ __u8 Buffer[0];
+} __packed;
+
+#define SMB2_LEASE_NONE __constant_cpu_to_le32(0x00)
+#define SMB2_LEASE_READ_CACHING __constant_cpu_to_le32(0x01)
+#define SMB2_LEASE_HANDLE_CACHING __constant_cpu_to_le32(0x02)
+#define SMB2_LEASE_WRITE_CACHING __constant_cpu_to_le32(0x04)
+
+#define SMB2_LEASE_FLAG_BREAK_IN_PROGRESS __constant_cpu_to_le32(0x02)
+
+#define SMB2_LEASE_KEY_SIZE 16
+
+struct lease_context {
+ __le64 LeaseKeyLow;
+ __le64 LeaseKeyHigh;
+ __le32 LeaseState;
+ __le32 LeaseFlags;
+ __le64 LeaseDuration;
+} __packed;
+
+struct create_lease {
+ struct create_context ccontext;
+ __u8 Name[8];
+ struct lease_context lcontext;
+} __packed;
+
/* Currently defined values for close flags */
#define SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB cpu_to_le16(0x0001)
struct smb2_close_req {