1 #ifndef __LIBCFS_USER_MEM_H__
2 #define __LIBCFS_USER_MEM_H__
4 #ifndef __LIBCFS_LIBCFS_H__
5 #error Do not #include this file directly. #include <libcfs/libcfs.h> instead
9 #error "This is only for user space."
14 * for this moment, liblusre will not rely OST for non-page-aligned write
16 #define LIBLUSTRE_HANDLE_UNALIGNED_PAGE
22 unsigned long private;
24 /* internally used by liblustre file i/o */
27 #ifdef LIBLUSTRE_HANDLE_UNALIGNED_PAGE
35 #define CFS_PAGE_SHIFT 12
36 #define CFS_PAGE_SIZE (1UL << CFS_PAGE_SHIFT)
37 #define CFS_PAGE_MASK (~((__u64)CFS_PAGE_SIZE-1))
39 cfs_page_t *cfs_alloc_pages(int mask, unsigned long order);
40 void cfs_free_pages(cfs_page_t *pg, int what);
41 cfs_page_t *cfs_alloc_page(unsigned int flags);
42 void cfs_free_page(cfs_page_t *pg);
43 void *cfs_page_address(cfs_page_t *pg);
44 void *cfs_kmap(cfs_page_t *pg);
45 void cfs_kunmap(cfs_page_t *pg);
47 #define __cfs_free_pages(pg, what) cfs_free_pages((pg), (what))
49 #define cfs_get_page(p) __I_should_not_be_called__(at_all)
50 #define cfs_page_count(p) __I_should_not_be_called__(at_all)
51 #define cfs_page_index(p) ((p)->index)
52 #define cfs_page_pin(page) do {} while (0)
53 #define cfs_page_unpin(page) do {} while (0)
57 * Inline function, so utils can use them without linking of libcfs
59 #define __ALLOC_ZERO (1 << 2)
60 static inline void *cfs_alloc(size_t nr_bytes, u_int32_t flags)
64 result = malloc(nr_bytes);
65 if (result != NULL && (flags & __ALLOC_ZERO))
66 memset(result, 0, nr_bytes);
70 #define cfs_free(addr) free(addr)
71 #define cfs_alloc_large(nr_bytes) cfs_alloc(nr_bytes, 0)
72 #define cfs_free_large(addr) cfs_free(addr)
74 #define CFS_ALLOC_ATOMIC_TRY (0)
82 #define CFS_SLAB_HWCACHE_ALIGN 0
83 #define CFS_SLAB_DESTROY_BY_RCU 0
84 #define CFS_SLAB_KERNEL 0
85 #define CFS_SLAB_NOFS 0
88 cfs_mem_cache_create(const char *, size_t, size_t, unsigned long);
89 int cfs_mem_cache_destroy(cfs_mem_cache_t *c);
90 void *cfs_mem_cache_alloc(cfs_mem_cache_t *c, int gfp);
91 void cfs_mem_cache_free(cfs_mem_cache_t *c, void *addr);
92 int cfs_mem_is_in_cache(const void *addr, const cfs_mem_cache_t *kmem);
97 static inline int cfs_copy_from_user(void *a,void *b, int c)
103 static inline int cfs_copy_to_user(void *a,void *b, int c)