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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>. | |
715f6251 | 6 | * UCRL-CODE-235197 |
7 | * | |
716154c5 | 8 | * This file is part of the SPL, Solaris Porting Layer. |
3d6af2dd | 9 | * For details, see <http://zfsonlinux.org/>. |
716154c5 BB |
10 | * |
11 | * The SPL is free software; you can redistribute it and/or modify it | |
12 | * under the terms of the GNU General Public License as published by the | |
13 | * Free Software Foundation; either version 2 of the License, or (at your | |
14 | * option) any later version. | |
715f6251 | 15 | * |
716154c5 | 16 | * The SPL is distributed in the hope that it will be useful, but WITHOUT |
715f6251 | 17 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
18 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
19 | * for more details. | |
20 | * | |
21 | * You should have received a copy of the GNU General Public License along | |
716154c5 BB |
22 | * with the SPL. If not, see <http://www.gnu.org/licenses/>. |
23 | \*****************************************************************************/ | |
715f6251 | 24 | |
a713518f | 25 | #ifndef _SPL_VMSYSTM_H |
34ee731f | 26 | #define _SPL_VMSYSTM_H |
a713518f | 27 | |
36b313da | 28 | #include <linux/mmzone.h> |
a713518f | 29 | #include <linux/mm.h> |
6ab69573 | 30 | #include <linux/swap.h> |
c5f70460 | 31 | #include <linux/highmem.h> |
33a20369 | 32 | #include <linux/vmalloc.h> |
af828292 | 33 | #include <sys/types.h> |
2bdb28fb | 34 | #include <asm/uaccess.h> |
af828292 | 35 | |
10946b02 AX |
36 | #define membar_producer() smp_wmb() |
37 | #define physmem totalram_pages | |
f6188ddd AX |
38 | #define freemem (nr_free_pages() + \ |
39 | global_page_state(NR_INACTIVE_FILE) + \ | |
40 | global_page_state(NR_INACTIVE_ANON) + \ | |
41 | global_page_state(NR_SLAB_RECLAIMABLE)) | |
a713518f | 42 | |
10946b02 AX |
43 | #define xcopyin(from, to, size) copy_from_user(to, from, size) |
44 | #define xcopyout(from, to, size) copy_to_user(to, from, size) | |
2bdb28fb | 45 | |
46 | static __inline__ int | |
47 | copyin(const void *from, void *to, size_t len) | |
48 | { | |
49 | /* On error copyin routine returns -1 */ | |
50 | if (xcopyin(from, to, len)) | |
34ee731f | 51 | return (-1); |
2bdb28fb | 52 | |
34ee731f | 53 | return (0); |
2bdb28fb | 54 | } |
55 | ||
56 | static __inline__ int | |
57 | copyout(const void *from, void *to, size_t len) | |
58 | { | |
59 | /* On error copyout routine returns -1 */ | |
60 | if (xcopyout(from, to, len)) | |
34ee731f | 61 | return (-1); |
2bdb28fb | 62 | |
34ee731f | 63 | return (0); |
2bdb28fb | 64 | } |
65 | ||
66 | static __inline__ int | |
67 | copyinstr(const void *from, void *to, size_t len, size_t *done) | |
68 | { | |
0998fdd6 | 69 | size_t rc; |
70 | ||
2bdb28fb | 71 | if (len == 0) |
34ee731f | 72 | return (-ENAMETOOLONG); |
2bdb28fb | 73 | |
2bdb28fb | 74 | /* XXX: Should return ENAMETOOLONG if 'strlen(from) > len' */ |
75 | ||
76 | memset(to, 0, len); | |
0998fdd6 | 77 | rc = copyin(from, to, len - 1); |
78 | if (done != NULL) | |
79 | *done = rc; | |
2bdb28fb | 80 | |
34ee731f | 81 | return (0); |
2bdb28fb | 82 | } |
2f5d55aa | 83 | |
a713518f | 84 | #endif /* SPL_VMSYSTM_H */ |