| /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*- |
| * vim:expandtab:shiftwidth=8:tabstop=8: |
| * |
| * Copyright (C) 2001 Cluster File Systems, Inc. <braam@clusterfs.com> |
| * |
| * This file is part of InterMezzo, http://www.inter-mezzo.org. |
| * |
| * InterMezzo is free software; you can redistribute it and/or |
| * modify it under the terms of version 2 of the GNU General Public |
| * License as published by the Free Software Foundation. |
| * |
| * InterMezzo 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 General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with InterMezzo; if not, write to the Free Software |
| * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| * |
| * Data structures unpacking/packing macros & inlines |
| * |
| */ |
| |
| #ifndef _INTERMEZZO_LIB_H |
| #define _INTERMEZZO_LIB_H |
| |
| #ifdef __KERNEL__ |
| # include <linux/types.h> |
| #else |
| # include <string.h> |
| # include <sys/types.h> |
| #endif |
| |
| #undef MIN |
| #define MIN(a,b) (((a)<(b)) ? (a): (b)) |
| #undef MAX |
| #define MAX(a,b) (((a)>(b)) ? (a): (b)) |
| #define MKSTR(ptr) ((ptr))? (ptr) : "" |
| |
| static inline int size_round (int val) |
| { |
| return (val + 3) & (~0x3); |
| } |
| |
| static inline int size_round0(int val) |
| { |
| if (!val) |
| return 0; |
| return (val + 1 + 3) & (~0x3); |
| } |
| |
| static inline size_t round_strlen(char *fset) |
| { |
| return size_round(strlen(fset) + 1); |
| } |
| |
| #ifdef __KERNEL__ |
| # define NTOH__u32(var) le32_to_cpu(var) |
| # define NTOH__u64(var) le64_to_cpu(var) |
| # define HTON__u32(var) cpu_to_le32(var) |
| # define HTON__u64(var) cpu_to_le64(var) |
| #else |
| # include <glib.h> |
| # define NTOH__u32(var) GUINT32_FROM_LE(var) |
| # define NTOH__u64(var) GUINT64_FROM_LE(var) |
| # define HTON__u32(var) GUINT32_TO_LE(var) |
| # define HTON__u64(var) GUINT64_TO_LE(var) |
| #endif |
| |
| /* |
| * copy sizeof(type) bytes from pointer to var and move ptr forward. |
| * return EFAULT if pointer goes beyond end |
| */ |
| #define UNLOGV(var,type,ptr,end) \ |
| do { \ |
| var = *(type *)ptr; \ |
| ptr += sizeof(type); \ |
| if (ptr > end ) \ |
| return -EFAULT; \ |
| } while (0) |
| |
| /* the following two macros convert to little endian */ |
| /* type MUST be __u32 or __u64 */ |
| #define LUNLOGV(var,type,ptr,end) \ |
| do { \ |
| var = NTOH##type(*(type *)ptr); \ |
| ptr += sizeof(type); \ |
| if (ptr > end ) \ |
| return -EFAULT; \ |
| } while (0) |
| |
| /* now log values */ |
| #define LOGV(var,type,ptr) \ |
| do { \ |
| *((type *)ptr) = var; \ |
| ptr += sizeof(type); \ |
| } while (0) |
| |
| /* and in network order */ |
| #define LLOGV(var,type,ptr) \ |
| do { \ |
| *((type *)ptr) = HTON##type(var); \ |
| ptr += sizeof(type); \ |
| } while (0) |
| |
| |
| /* |
| * set var to point at (type *)ptr, move ptr forward with sizeof(type) |
| * return from function with EFAULT if ptr goes beyond end |
| */ |
| #define UNLOGP(var,type,ptr,end) \ |
| do { \ |
| var = (type *)ptr; \ |
| ptr += sizeof(type); \ |
| if (ptr > end ) \ |
| return -EFAULT; \ |
| } while (0) |
| |
| #define LOGP(var,type,ptr) \ |
| do { \ |
| memcpy(ptr, var, sizeof(type)); \ |
| ptr += sizeof(type); \ |
| } while (0) |
| |
| /* |
| * set var to point at (char *)ptr, move ptr forward by size_round(len); |
| * return from function with EFAULT if ptr goes beyond end |
| */ |
| #define UNLOGL(var,type,len,ptr,end) \ |
| do { \ |
| if (len == 0) \ |
| var = (type *)0; \ |
| else { \ |
| var = (type *)ptr; \ |
| ptr += size_round(len * sizeof(type)); \ |
| } \ |
| if (ptr > end ) \ |
| return -EFAULT; \ |
| } while (0) |
| |
| #define UNLOGL0(var,type,len,ptr,end) \ |
| do { \ |
| UNLOGL(var,type,len+1,ptr,end); \ |
| if ( *((char *)ptr - size_round(len+1) + len) != '\0') \ |
| return -EFAULT; \ |
| } while (0) |
| |
| #define LOGL(var,len,ptr) \ |
| do { \ |
| size_t __fill = size_round(len); \ |
| /* Prevent data leakage. */ \ |
| if (__fill > 0) \ |
| memset((char *)ptr, 0, __fill); \ |
| memcpy((char *)ptr, (const char *)var, len); \ |
| ptr += __fill; \ |
| } while (0) |
| |
| #define LOGL0(var,len,ptr) \ |
| do { \ |
| if (!len) break; \ |
| memcpy((char *)ptr, (const char *)var, len); \ |
| *((char *)(ptr) + len) = 0; \ |
| ptr += size_round(len + 1); \ |
| } while (0) |
| |
| #endif /* _INTERMEZZO_LIB_H */ |
| |