18d59ecb2SHans Petter Selasky /*- 28d59ecb2SHans Petter Selasky * Copyright (c) 2010 Isilon Systems, Inc. 38d59ecb2SHans Petter Selasky * Copyright (c) 2010 iX Systems, Inc. 48d59ecb2SHans Petter Selasky * Copyright (c) 2010 Panasas, Inc. 5677a229cSHans Petter Selasky * Copyright (c) 2013-2016 Mellanox Technologies, Ltd. 68d59ecb2SHans Petter Selasky * All rights reserved. 78d59ecb2SHans Petter Selasky * 88d59ecb2SHans Petter Selasky * Redistribution and use in source and binary forms, with or without 98d59ecb2SHans Petter Selasky * modification, are permitted provided that the following conditions 108d59ecb2SHans Petter Selasky * are met: 118d59ecb2SHans Petter Selasky * 1. Redistributions of source code must retain the above copyright 128d59ecb2SHans Petter Selasky * notice unmodified, this list of conditions, and the following 138d59ecb2SHans Petter Selasky * disclaimer. 148d59ecb2SHans Petter Selasky * 2. Redistributions in binary form must reproduce the above copyright 158d59ecb2SHans Petter Selasky * notice, this list of conditions and the following disclaimer in the 168d59ecb2SHans Petter Selasky * documentation and/or other materials provided with the distribution. 178d59ecb2SHans Petter Selasky * 188d59ecb2SHans Petter Selasky * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 198d59ecb2SHans Petter Selasky * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 208d59ecb2SHans Petter Selasky * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 218d59ecb2SHans Petter Selasky * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 228d59ecb2SHans Petter Selasky * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 238d59ecb2SHans Petter Selasky * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 248d59ecb2SHans Petter Selasky * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 258d59ecb2SHans Petter Selasky * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 268d59ecb2SHans Petter Selasky * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 278d59ecb2SHans Petter Selasky * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 288d59ecb2SHans Petter Selasky * 298d59ecb2SHans Petter Selasky * $FreeBSD$ 308d59ecb2SHans Petter Selasky */ 31307f78f3SVladimir Kondratyev #ifndef _LINUXKPI_LINUX_ERR_H_ 32307f78f3SVladimir Kondratyev #define _LINUXKPI_LINUX_ERR_H_ 338d59ecb2SHans Petter Selasky 3447c0672bSHans Petter Selasky #include <sys/types.h> 3547c0672bSHans Petter Selasky 36677a229cSHans Petter Selasky #include <linux/compiler.h> 37677a229cSHans Petter Selasky 388d59ecb2SHans Petter Selasky #define MAX_ERRNO 4095 398d59ecb2SHans Petter Selasky 40de66c9a1SJohn Baldwin #define IS_ERR_VALUE(x) unlikely((x) >= (uintptr_t)-MAX_ERRNO) 418d59ecb2SHans Petter Selasky 428d59ecb2SHans Petter Selasky static inline void * 438d59ecb2SHans Petter Selasky ERR_PTR(long error) 448d59ecb2SHans Petter Selasky { 45de66c9a1SJohn Baldwin return (void *)(intptr_t)error; 468d59ecb2SHans Petter Selasky } 478d59ecb2SHans Petter Selasky 488d59ecb2SHans Petter Selasky static inline long 498d59ecb2SHans Petter Selasky PTR_ERR(const void *ptr) 508d59ecb2SHans Petter Selasky { 51de66c9a1SJohn Baldwin return (intptr_t)ptr; 528d59ecb2SHans Petter Selasky } 538d59ecb2SHans Petter Selasky 54de66c9a1SJohn Baldwin static inline bool 558d59ecb2SHans Petter Selasky IS_ERR(const void *ptr) 568d59ecb2SHans Petter Selasky { 57de66c9a1SJohn Baldwin return IS_ERR_VALUE((uintptr_t)ptr); 588d59ecb2SHans Petter Selasky } 598d59ecb2SHans Petter Selasky 60de66c9a1SJohn Baldwin static inline bool 618d59ecb2SHans Petter Selasky IS_ERR_OR_NULL(const void *ptr) 628d59ecb2SHans Petter Selasky { 63de66c9a1SJohn Baldwin return !ptr || IS_ERR_VALUE((uintptr_t)ptr); 648d59ecb2SHans Petter Selasky } 658d59ecb2SHans Petter Selasky 668d59ecb2SHans Petter Selasky static inline void * 6747c0672bSHans Petter Selasky ERR_CAST(const void *ptr) 688d59ecb2SHans Petter Selasky { 6947c0672bSHans Petter Selasky return __DECONST(void *, ptr); 708d59ecb2SHans Petter Selasky } 718d59ecb2SHans Petter Selasky 728d59ecb2SHans Petter Selasky static inline int 738d59ecb2SHans Petter Selasky PTR_ERR_OR_ZERO(const void *ptr) 748d59ecb2SHans Petter Selasky { 758d59ecb2SHans Petter Selasky if (IS_ERR(ptr)) 768d59ecb2SHans Petter Selasky return PTR_ERR(ptr); 778d59ecb2SHans Petter Selasky else 788d59ecb2SHans Petter Selasky return 0; 798d59ecb2SHans Petter Selasky } 808d59ecb2SHans Petter Selasky 818d59ecb2SHans Petter Selasky #define PTR_RET(p) PTR_ERR_OR_ZERO(p) 828d59ecb2SHans Petter Selasky 83307f78f3SVladimir Kondratyev #endif /* _LINUXKPI_LINUX_ERR_H_ */ 84