xref: /linux/fs/smb/server/mgmt/ksmbd_ida.h (revision 1ac731c529cd4d6adbce134754b51ff7d822b145)
1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3  *   Copyright (C) 2018 Samsung Electronics Co., Ltd.
4  */
5 
6 #ifndef __KSMBD_IDA_MANAGEMENT_H__
7 #define __KSMBD_IDA_MANAGEMENT_H__
8 
9 #include <linux/slab.h>
10 #include <linux/idr.h>
11 
12 /*
13  * 2.2.1.6.7 TID Generation
14  *    The value 0xFFFF MUST NOT be used as a valid TID. All other
15  *    possible values for TID, including zero (0x0000), are valid.
16  *    The value 0xFFFF is used to specify all TIDs or no TID,
17  *    depending upon the context in which it is used.
18  */
19 int ksmbd_acquire_smb2_tid(struct ida *ida);
20 
21 /*
22  * 2.2.1.6.8 UID Generation
23  *    The value 0xFFFE was declared reserved in the LAN Manager 1.0
24  *    documentation, so a value of 0xFFFE SHOULD NOT be used as a
25  *    valid UID.<21> All other possible values for a UID, excluding
26  *    zero (0x0000), are valid.
27  */
28 int ksmbd_acquire_smb2_uid(struct ida *ida);
29 int ksmbd_acquire_async_msg_id(struct ida *ida);
30 
31 int ksmbd_acquire_id(struct ida *ida);
32 
33 void ksmbd_release_id(struct ida *ida, int id);
34 #endif /* __KSMBD_IDA_MANAGEMENT_H__ */
35