1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * Copyright (C) 2001 Cluster File Systems, Inc. <braam@clusterfs.com>
6 * This file is part of Lustre, http://www.lustre.org.
8 * Lustre is free software; you can redistribute it and/or
9 * modify it under the terms of version 2 of the GNU General Public
10 * License as published by the Free Software Foundation.
12 * Lustre is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with Lustre; if not, write to the Free Software
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 * Basic library routines.
25 #ifndef __LIBCFS_LINUX_CFS_MEM_H__
26 #define __LIBCFS_LINUX_CFS_MEM_H__
28 #ifndef __LIBCFS_LIBCFS_H__
29 #error Do not #include this file directly. #include <libcfs/libcfs.h> instead
33 # include <linux/mm.h>
34 # include <linux/vmalloc.h>
35 # include <linux/pagemap.h>
36 # include <linux/slab.h>
37 # ifdef HAVE_MM_INLINE
38 # include <linux/mm_inline.h>
41 typedef struct page cfs_page_t;
42 #define CFS_PAGE_SIZE PAGE_CACHE_SIZE
43 #define CFS_PAGE_SHIFT PAGE_CACHE_SHIFT
44 #define CFS_PAGE_MASK (~((__u64)CFS_PAGE_SIZE-1))
46 static inline void *cfs_page_address(cfs_page_t *page)
49 * XXX nikita: do NOT call portals_debug_msg() (CDEBUG/ENTRY/EXIT)
50 * from here: this will lead to infinite recursion.
52 return page_address(page);
55 static inline void *cfs_kmap(cfs_page_t *page)
60 static inline void cfs_kunmap(cfs_page_t *page)
65 static inline void cfs_get_page(cfs_page_t *page)
70 static inline int cfs_page_count(cfs_page_t *page)
72 return page_count(page);
75 #define cfs_page_index(p) ((p)->index)
79 * XXX Liang: move these declare to public file
81 extern void *cfs_alloc(size_t nr_bytes, u_int32_t flags);
82 extern void cfs_free(void *addr);
84 extern void *cfs_alloc_large(size_t nr_bytes);
85 extern void cfs_free_large(void *addr);
87 extern cfs_page_t *cfs_alloc_pages(unsigned int flags, unsigned int order);
88 extern void __cfs_free_pages(cfs_page_t *page, unsigned int order);
90 #define cfs_alloc_page(flags) cfs_alloc_pages(flags, 0)
91 #define __cfs_free_page(page) __cfs_free_pages(page, 0)
92 #define cfs_free_page(p) __free_pages(p, 0)
95 * In Linux there is no way to determine whether current execution context is
98 #define CFS_ALLOC_ATOMIC_TRY CFS_ALLOC_ATOMIC
102 * XXX Liang: move these declare to public file
104 #ifdef HAVE_KMEM_CACHE
105 typedef struct kmem_cache cfs_mem_cache_t;
107 typedef kmem_cache_t cfs_mem_cache_t;
109 extern cfs_mem_cache_t * cfs_mem_cache_create (const char *, size_t, size_t, unsigned long);
110 extern int cfs_mem_cache_destroy ( cfs_mem_cache_t * );
111 extern void *cfs_mem_cache_alloc ( cfs_mem_cache_t *, int);
112 extern void cfs_mem_cache_free ( cfs_mem_cache_t *, void *);
116 #define CFS_DECL_MMSPACE mm_segment_t __oldfs
117 #define CFS_MMSPACE_OPEN do { __oldfs = get_fs(); set_fs(get_ds());} while(0)
118 #define CFS_MMSPACE_CLOSE set_fs(__oldfs)
120 #else /* !__KERNEL__ */
121 #ifdef HAVE_ASM_PAGE_H
122 #include <asm/page.h> /* needed for PAGE_SIZE - rread */
125 #include <libcfs/user-prim.h>
129 #endif /* __LINUX_CFS_MEM_H__ */