*
* You should have received a copy of the GNU General Public License
* version 2 along with this program; If not, see
- * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
- *
- * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
- * CA 95054 USA or visit www.sun.com if you need additional information or
- * have any questions.
+ * http://www.gnu.org/licenses/gpl-2.0.html
*
* GPL HEADER END
*/
* Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*
- * Copyright (c) 2011, Whamcloud, Inc.
+ * Copyright (c) 2011, 2014, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
#ifndef __LIBCFS_LINUX_CFS_MEM_H__
#define __LIBCFS_LINUX_CFS_MEM_H__
-#ifndef __LIBCFS_LIBCFS_H__
-#error Do not #include this file directly. #include <libcfs/libcfs.h> instead
-#endif
-
-#ifndef __KERNEL__
-#error This include is only for kernel use.
-#endif
-
#include <linux/mm.h>
#include <linux/vmalloc.h>
#include <linux/pagemap.h>
#ifdef HAVE_MM_INLINE
# include <linux/mm_inline.h>
#endif
+#include <linux/sched.h>
+#ifdef HAVE_SCHED_HEADERS
+#include <linux/sched/mm.h>
+#endif
-typedef struct page cfs_page_t;
-#define CFS_PAGE_SIZE PAGE_CACHE_SIZE
-#define CFS_PAGE_SHIFT PAGE_CACHE_SHIFT
-#define CFS_PAGE_MASK (~((__u64)CFS_PAGE_SIZE-1))
-
-#define cfs_num_physpages num_physpages
-
-#define cfs_copy_from_user(to, from, n) copy_from_user(to, from, n)
-#define cfs_copy_to_user(to, from, n) copy_to_user(to, from, n)
+#ifdef HAVE_TOTALRAM_PAGES_AS_FUNC
+ #ifndef cfs_totalram_pages
+ #define cfs_totalram_pages() totalram_pages()
+ #endif
+#else
+ #ifndef cfs_totalram_pages
+ #define cfs_totalram_pages() totalram_pages
+ #endif
+#endif
-static inline void *cfs_page_address(cfs_page_t *page)
+#ifndef HAVE_MEMALLOC_RECLAIM
+static inline unsigned int memalloc_noreclaim_save(void)
{
- /*
- * XXX nikita: do NOT call portals_debug_msg() (CDEBUG/ENTRY/EXIT)
- * from here: this will lead to infinite recursion.
- */
- return page_address(page);
+ unsigned int flags = current->flags & PF_MEMALLOC;
+
+ current->flags |= PF_MEMALLOC;
+ return flags;
}
-static inline void *cfs_kmap(cfs_page_t *page)
+static inline void memalloc_noreclaim_restore(unsigned int flags)
{
- return kmap(page);
+ current->flags = (current->flags & ~PF_MEMALLOC) | flags;
}
+#endif /* !HAVE_MEMALLOC_RECLAIM */
-static inline void cfs_kunmap(cfs_page_t *page)
+#ifndef HAVE_BITMAP_ALLOC
+static inline unsigned long *bitmap_alloc(unsigned int nbits, gfp_t flags)
{
- kunmap(page);
+ return kmalloc_array(BITS_TO_LONGS(nbits), sizeof(unsigned long),
+ flags);
}
-static inline void cfs_get_page(cfs_page_t *page)
+static inline unsigned long *bitmap_zalloc(unsigned int nbits, gfp_t flags)
{
- get_page(page);
+ return bitmap_alloc(nbits, flags | __GFP_ZERO);
}
-static inline int cfs_page_count(cfs_page_t *page)
+static inline void bitmap_free(const unsigned long *bitmap)
{
- return page_count(page);
+ kfree(bitmap);
}
-
-#define cfs_page_index(p) ((p)->index)
-
-#define cfs_page_pin(page) page_cache_get(page)
-#define cfs_page_unpin(page) page_cache_release(page)
-
-/*
- * Memory allocator
- * XXX Liang: move these declare to public file
- */
-extern void *cfs_alloc(size_t nr_bytes, u_int32_t flags);
-extern void cfs_free(void *addr);
-
-extern void *cfs_alloc_large(size_t nr_bytes);
-extern void cfs_free_large(void *addr);
-
-extern cfs_page_t *cfs_alloc_page(unsigned int flags);
-extern void cfs_free_page(cfs_page_t *page);
-
-#define cfs_memory_pressure_get() (current->flags & PF_MEMALLOC)
-#define cfs_memory_pressure_set() do { current->flags |= PF_MEMALLOC; } while (0)
-#define cfs_memory_pressure_clr() do { current->flags &= ~PF_MEMALLOC; } while (0)
-
-#if BITS_PER_LONG == 32
-/* limit to lowmem on 32-bit systems */
-#define CFS_NUM_CACHEPAGES \
- min(cfs_num_physpages, 1UL << (30 - CFS_PAGE_SHIFT) * 3 / 4)
-#else
-#define CFS_NUM_CACHEPAGES cfs_num_physpages
-#endif
-
-/*
- * In Linux there is no way to determine whether current execution context is
- * blockable.
- */
-#define CFS_ALLOC_ATOMIC_TRY CFS_ALLOC_ATOMIC
-
-/*
- * SLAB allocator
- * XXX Liang: move these declare to public file
- */
-typedef struct kmem_cache cfs_mem_cache_t;
-extern cfs_mem_cache_t * cfs_mem_cache_create (const char *, size_t, size_t, unsigned long);
-extern int cfs_mem_cache_destroy ( cfs_mem_cache_t * );
-extern void *cfs_mem_cache_alloc ( cfs_mem_cache_t *, int);
-extern void cfs_mem_cache_free ( cfs_mem_cache_t *, void *);
-extern int cfs_mem_is_in_cache(const void *addr, const cfs_mem_cache_t *kmem);
-
-#define CFS_DECL_MMSPACE mm_segment_t __oldfs
-#define CFS_MMSPACE_OPEN \
- do { __oldfs = get_fs(); set_fs(get_ds());} while(0)
-#define CFS_MMSPACE_CLOSE set_fs(__oldfs)
-
-#define CFS_SLAB_HWCACHE_ALIGN SLAB_HWCACHE_ALIGN
-#define CFS_SLAB_KERNEL SLAB_KERNEL
-#define CFS_SLAB_NOFS SLAB_NOFS
+#endif /* !HAVE_BITMAP_ALLOC */
/*
* Shrinker
*/
-#define cfs_shrinker shrinker
-
-#ifdef HAVE_SHRINK_CONTROL
# define SHRINKER_ARGS(sc, nr_to_scan, gfp_mask) \
struct shrinker *shrinker, \
struct shrink_control *sc
# define shrink_param(sc, var) ((sc)->var)
+
+#ifdef HAVE_SHRINKER_COUNT
+struct shrinker_var {
+ unsigned long (*count)(struct shrinker *,
+ struct shrink_control *sc);
+ unsigned long (*scan)(struct shrinker *,
+ struct shrink_control *sc);
+};
+# define DEF_SHRINKER_VAR(name, shrink, count_obj, scan_obj) \
+ struct shrinker_var name = { .count = count_obj, .scan = scan_obj }
#else
-# ifdef HAVE_SHRINKER_WANT_SHRINK_PTR
-# define SHRINKER_ARGS(sc, nr_to_scan, gfp_mask) \
- struct shrinker *shrinker, \
- int nr_to_scan, gfp_t gfp_mask
-# else
-# define SHRINKER_ARGS(sc, nr_to_scan, gfp_mask) \
- int nr_to_scan, gfp_t gfp_mask
-# endif
-# define shrink_param(sc, var) (var)
+struct shrinker_var {
+ int (*shrink)(SHRINKER_ARGS(sc, nr_to_scan, gfp_mask));
+};
+# define DEF_SHRINKER_VAR(name, shrinker, count, scan) \
+ struct shrinker_var name = { .shrink = shrinker }
+# define SHRINK_STOP (~0UL)
#endif
-#ifdef HAVE_REGISTER_SHRINKER
-typedef int (*cfs_shrinker_t)(SHRINKER_ARGS(sc, nr_to_scan, gfp_mask));
-
static inline
-struct cfs_shrinker *cfs_set_shrinker(int seek, cfs_shrinker_t func)
+struct shrinker *set_shrinker(int seek, struct shrinker_var *var)
{
struct shrinker *s;
- s = kmalloc(sizeof(*s), GFP_KERNEL);
+ s = kzalloc(sizeof(*s), GFP_KERNEL);
if (s == NULL)
return (NULL);
- s->shrink = func;
+#ifdef HAVE_SHRINKER_COUNT
+ s->count_objects = var->count;
+ s->scan_objects = var->scan;
+#else
+ s->shrink = var->shrink;
+#endif
s->seeks = seek;
register_shrinker(s);
}
static inline
-void cfs_remove_shrinker(struct cfs_shrinker *shrinker)
+void remove_shrinker(struct shrinker *shrinker)
{
if (shrinker == NULL)
return;
unregister_shrinker(shrinker);
kfree(shrinker);
}
-#else
-typedef shrinker_t cfs_shrinker_t;
-#define cfs_set_shrinker(s, f) set_shrinker(s, f)
-#define cfs_remove_shrinker(s) remove_shrinker(s)
-#endif
-#define CFS_DEFAULT_SEEKS DEFAULT_SEEKS
#endif /* __LINUX_CFS_MEM_H__ */
git://git.whamcloud.com / fs / lustre-release.git / blobdiff