111 lines
2.9 KiB
C
111 lines
2.9 KiB
C
/*
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* This file is part of the SPL: Solaris Porting Layer.
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*
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* Copyright (c) 2008 Lawrence Livermore National Security, LLC.
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* Produced at Lawrence Livermore National Laboratory
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* Written by:
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* Brian Behlendorf <behlendorf1@llnl.gov>,
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* Herb Wartens <wartens2@llnl.gov>,
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* Jim Garlick <garlick@llnl.gov>
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* UCRL-CODE-235197
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*
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* This is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef _SPL_VMSYSTM_H
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#define _SPL_VMSYSTM_H
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#include <linux/mm.h>
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#include <linux/swap.h>
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#include <sys/types.h>
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#include <asm/uaccess.h>
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extern vmem_t *zio_alloc_arena; /* arena for zio caches */
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#define physmem num_physpages
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#define freemem nr_free_pages() // Expensive on linux,
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// cheap on solaris
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#define minfree 0
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#define ptob(pages) (pages * PAGE_SIZE)
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#define membar_producer() smp_wmb()
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#define xcopyin(from, to, size) copy_from_user(to, from, size)
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#define xcopyout(from, to, size) copy_to_user(to, from, size)
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static __inline__ int
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copyin(const void *from, void *to, size_t len)
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{
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/* On error copyin routine returns -1 */
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if (xcopyin(from, to, len))
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return -1;
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return 0;
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}
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static __inline__ int
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copyout(const void *from, void *to, size_t len)
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{
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/* On error copyout routine returns -1 */
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if (xcopyout(from, to, len))
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return -1;
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return 0;
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}
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static __inline__ int
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copyinstr(const void *from, void *to, size_t len, size_t *done)
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{
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size_t rc;
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if (len == 0)
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return -ENAMETOOLONG;
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/* XXX: Should return ENAMETOOLONG if 'strlen(from) > len' */
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memset(to, 0, len);
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rc = copyin(from, to, len - 1);
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if (done != NULL)
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*done = rc;
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return 0;
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}
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#if 0
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/* The average number of free pages over the last 5 seconds */
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#define avefree 0
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/* The average number of free pages over the last 30 seconds */
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#define avefree30 0
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/* A guess as to how much memory has been promised to
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* processes but not yet allocated */
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#define deficit 0
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/* A guess as to how many page are needed to satisfy
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* stalled page creation requests */
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#define needfree 0
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/* A bootlean the controls the setting of deficit */
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#define desperate
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/* When free memory is above this limit, no paging or swapping is done */
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#define lotsfree 0
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/* When free memory is above this limit, swapping is not performed */
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#define desfree 0
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#endif
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#endif /* SPL_VMSYSTM_H */
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