4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License version 2 for more details. A copy is
14 * included in the COPYING file that accompanied this code.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 #ifndef __LIBCFS_USER_MEM_H__
24 #define __LIBCFS_USER_MEM_H__
26 #ifndef __LIBCFS_LIBCFS_H__
27 #error Do not #include this file directly. #include <libcfs/libcfs.h> instead
31 #error "This is only for user space."
36 * for this moment, liblusre will not rely OST for non-page-aligned write
38 #define LIBLUSTRE_HANDLE_UNALIGNED_PAGE
44 unsigned long private;
46 /* internally used by liblustre file i/o */
49 #ifdef LIBLUSTRE_HANDLE_UNALIGNED_PAGE
57 #define CFS_PAGE_SHIFT 12
58 #define CFS_PAGE_SIZE (1UL << CFS_PAGE_SHIFT)
59 #define CFS_PAGE_MASK (~((__u64)CFS_PAGE_SIZE-1))
61 cfs_page_t *cfs_alloc_page(unsigned int flags);
62 void cfs_free_page(cfs_page_t *pg);
63 void *cfs_page_address(cfs_page_t *pg);
64 void *cfs_kmap(cfs_page_t *pg);
65 void cfs_kunmap(cfs_page_t *pg);
67 #define cfs_get_page(p) __I_should_not_be_called__(at_all)
68 #define cfs_page_count(p) __I_should_not_be_called__(at_all)
69 #define cfs_page_index(p) ((p)->index)
70 #define cfs_page_pin(page) do {} while (0)
71 #define cfs_page_unpin(page) do {} while (0)
75 * Inline function, so utils can use them without linking of libcfs
77 #define __ALLOC_ZERO (1 << 2)
78 static inline void *cfs_alloc(size_t nr_bytes, u_int32_t flags)
82 result = malloc(nr_bytes);
83 if (result != NULL && (flags & __ALLOC_ZERO))
84 memset(result, 0, nr_bytes);
88 #define cfs_free(addr) free(addr)
89 #define cfs_alloc_large(nr_bytes) cfs_alloc(nr_bytes, 0)
90 #define cfs_free_large(addr) cfs_free(addr)
92 #define CFS_ALLOC_ATOMIC_TRY (0)
100 #define CFS_SLAB_HWCACHE_ALIGN 0
101 #define SLAB_DESTROY_BY_RCU 0
102 #define CFS_SLAB_KERNEL 0
103 #define CFS_SLAB_NOFS 0
106 cfs_mem_cache_create(const char *, size_t, size_t, unsigned long);
107 int cfs_mem_cache_destroy(cfs_mem_cache_t *c);
108 void *cfs_mem_cache_alloc(cfs_mem_cache_t *c, int gfp);
109 void cfs_mem_cache_free(cfs_mem_cache_t *c, void *addr);
110 int cfs_mem_is_in_cache(const void *addr, const cfs_mem_cache_t *kmem);
115 #define cfs_cpt_malloc(cptab, cpt, bytes, flags) \
116 cfs_alloc(bytes, flags)
117 #define cfs_cpt_vmalloc(cptab, cpt, bytes) \
119 #define cfs_page_cpt_alloc(cptab, cpt, mask) \
121 #define cfs_mem_cache_cpt_alloc(cache, cptab, cpt, gfp) \
122 cfs_mem_cache_alloc(cache, gfp)
124 #define smp_rmb() do {} while (0)
129 static inline int cfs_copy_from_user(void *a,void *b, int c)
135 static inline int cfs_copy_to_user(void *a,void *b, int c)