cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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ksmbd_ida.c (761B)

      1// SPDX-License-Identifier: GPL-2.0-or-later
      2/*
      3 *   Copyright (C) 2018 Samsung Electronics Co., Ltd.
      4 */
      5
      6#include "ksmbd_ida.h"
      7
      8static inline int __acquire_id(struct ida *ida, int from, int to)
      9{
     10	return ida_simple_get(ida, from, to, GFP_KERNEL);
     11}
     12
     13int ksmbd_acquire_smb2_tid(struct ida *ida)
     14{
     15	int id;
     16
     17	id = __acquire_id(ida, 1, 0xFFFFFFFF);
     18
     19	return id;
     20}
     21
     22int ksmbd_acquire_smb2_uid(struct ida *ida)
     23{
     24	int id;
     25
     26	id = __acquire_id(ida, 1, 0);
     27	if (id == 0xFFFE)
     28		id = __acquire_id(ida, 1, 0);
     29
     30	return id;
     31}
     32
     33int ksmbd_acquire_async_msg_id(struct ida *ida)
     34{
     35	return __acquire_id(ida, 1, 0);
     36}
     37
     38int ksmbd_acquire_id(struct ida *ida)
     39{
     40	return __acquire_id(ida, 0, 0);
     41}
     42
     43void ksmbd_release_id(struct ida *ida, int id)
     44{
     45	ida_simple_remove(ida, id);
     46}