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
copyin(const void * from,void * to,size_t len)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
copyout(const void * from,void * to,size_t len)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
copyinstr(const void * from,void * to,size_t len,size_t * done)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 */
95