vmsystm.h

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    1 /*
    2  *  Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC.
    3  *  Copyright (C) 2007 The Regents of the University of California.
    4  *  Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
    5  *  Written by Brian Behlendorf <behlendorf1@llnl.gov>.
    6  *  UCRL-CODE-235197
    7  *
    8  *  This file is part of the SPL, Solaris Porting Layer.
    9  *
   10  *  The SPL is free software; you can redistribute it and/or modify it
   11  *  under the terms of the GNU General Public License as published by the
   12  *  Free Software Foundation; either version 2 of the License, or (at your
   13  *  option) any later version.
   14  *
   15  *  The SPL is distributed in the hope that it will be useful, but WITHOUT
   16  *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
   17  *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
   18  *  for more details.
   19  *
   20  *  You should have received a copy of the GNU General Public License along
   21  *  with the SPL.  If not, see <http://www.gnu.org/licenses/>.
   22  */
   23 
   24 #ifndef _SPL_VMSYSTM_H
   25 #define _SPL_VMSYSTM_H
   26 
   27 #include <linux/mmzone.h>
   28 #include <linux/mm.h>
   29 #include <linux/swap.h>
   30 #include <linux/highmem.h>
   31 #include <linux/vmalloc.h>
   32 #include <sys/types.h>
   33 #include <asm/uaccess.h>
   34 
   35 #ifdef HAVE_TOTALRAM_PAGES_FUNC
   36 #define zfs_totalram_pages      totalram_pages()
   37 #else
   38 #define zfs_totalram_pages      totalram_pages
   39 #endif
   40 
   41 #ifdef HAVE_TOTALHIGH_PAGES
   42 #define zfs_totalhigh_pages     totalhigh_pages()
   43 #else
   44 #define zfs_totalhigh_pages     totalhigh_pages
   45 #endif
   46 
   47 #define membar_consumer()               smp_rmb()
   48 #define membar_producer()               smp_wmb()
   49 #define membar_sync()                   smp_mb()
   50 
   51 #define physmem                         zfs_totalram_pages
   52 
   53 #define xcopyin(from, to, size)         copy_from_user(to, from, size)
   54 #define xcopyout(from, to, size)        copy_to_user(to, from, size)
   55 
   56 static __inline__ int
   57 copyin(const void *from, void *to, size_t len)
   58 {
   59         /* On error copyin routine returns -1 */
   60         if (xcopyin(from, to, len))
   61                 return (-1);
   62 
   63         return (0);
   64 }
   65 
   66 static __inline__ int
   67 copyout(const void *from, void *to, size_t len)
   68 {
   69         /* On error copyout routine returns -1 */
   70         if (xcopyout(from, to, len))
   71                 return (-1);
   72 
   73         return (0);
   74 }
   75 
   76 static __inline__ int
   77 copyinstr(const void *from, void *to, size_t len, size_t *done)
   78 {
   79         size_t rc;
   80 
   81         if (len == 0)
   82                 return (-ENAMETOOLONG);
   83 
   84         /* XXX: Should return ENAMETOOLONG if 'strlen(from) > len' */
   85 
   86         memset(to, 0, len);
   87         rc = copyin(from, to, len - 1);
   88         if (done != NULL)
   89                 *done = rc;
   90 
   91         return (0);
   92 }
   93 
   94 #endif /* SPL_VMSYSTM_H */

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FreeBSD/Linux Kernel Cross Reference sys/contrib/openzfs/include/os/linux/spl/sys/vmsystm.h

FreeBSD/Linux Kernel Cross Reference
sys/contrib/openzfs/include/os/linux/spl/sys/vmsystm.h