/* * Copyright (c) 2000-2004 Silicon Graphics, Inc. All Rights Reserved. * * This program is free software; you can redistribute it and/or modify it * under the terms of version 2 of the GNU General Public License as * published by the Free Software Foundation. * * This program is distributed in the hope that it would be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. * * Further, this software is distributed without any warranty that it is * free of the rightful claim of any third person regarding infringement * or the like. Any license provided herein, whether implied or * otherwise, applies only to this software file. Patent licenses, if * any, provided herein do not apply to combinations of this program with * other software, or any other product whatsoever. * * You should have received a copy of the GNU General Public License along * with this program; if not, write the Free Software Foundation, Inc., 59 * Temple Place - Suite 330, Boston MA 02111-1307, USA. * * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy, * Mountain View, CA 94043, or: * * http://www.sgi.com * * For further information regarding this notice, see: * * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/ */ #ifndef __XFS_SUPPORT_KMEM_H__ #define __XFS_SUPPORT_KMEM_H__ #include <linux/slab.h> #include <linux/sched.h> #include <linux/mm.h> /* * memory management routines */ #define KM_SLEEP 0x0001 #define KM_NOSLEEP 0x0002 #define KM_NOFS 0x0004 #define KM_MAYFAIL 0x0008 #define kmem_zone kmem_cache_s #define kmem_zone_t kmem_cache_t typedef unsigned long xfs_pflags_t; #define PFLAGS_TEST_NOIO() (current->flags & PF_NOIO) #define PFLAGS_TEST_FSTRANS() (current->flags & PF_FSTRANS) #define PFLAGS_SET_NOIO() do { \ current->flags |= PF_NOIO; \ } while (0) #define PFLAGS_CLEAR_NOIO() do { \ current->flags &= ~PF_NOIO; \ } while (0) /* these could be nested, so we save state */ #define PFLAGS_SET_FSTRANS(STATEP) do { \ *(STATEP) = current->flags; \ current->flags |= PF_FSTRANS; \ } while (0) #define PFLAGS_CLEAR_FSTRANS(STATEP) do { \ *(STATEP) = current->flags; \ current->flags &= ~PF_FSTRANS; \ } while (0) /* Restore the PF_FSTRANS state to what was saved in STATEP */ #define PFLAGS_RESTORE_FSTRANS(STATEP) do { \ current->flags = ((current->flags & ~PF_FSTRANS) | \ (*(STATEP) & PF_FSTRANS)); \ } while (0) #define PFLAGS_DUP(OSTATEP, NSTATEP) do { \ *(NSTATEP) = *(OSTATEP); \ } while (0) static __inline unsigned int kmem_flags_convert(int flags) { int lflags = __GFP_NOWARN; /* we'll report problems, if need be */ #ifdef DEBUG if (unlikely(flags & ~(KM_SLEEP|KM_NOSLEEP|KM_NOFS|KM_MAYFAIL))) { printk(KERN_WARNING "XFS: memory allocation with wrong flags (%x)\n", flags); BUG(); } #endif if (flags & KM_NOSLEEP) { lflags |= GFP_ATOMIC; } else { lflags |= GFP_KERNEL; /* avoid recusive callbacks to filesystem during transactions */ if (PFLAGS_TEST_FSTRANS() || (flags & KM_NOFS)) lflags &= ~__GFP_FS; } return lflags; } static __inline kmem_zone_t * kmem_zone_init(int size, char *zone_name) { return kmem_cache_create(zone_name, size, 0, 0, NULL, NULL); } static __inline void kmem_zone_free(kmem_zone_t *zone, void *ptr) { kmem_cache_free(zone, ptr); } static __inline void kmem_zone_destroy(kmem_zone_t *zone) { if (zone && kmem_cache_destroy(zone)) BUG(); } extern void *kmem_zone_zalloc(kmem_zone_t *, int); extern void *kmem_zone_alloc(kmem_zone_t *, int); extern void *kmem_alloc(size_t, int); extern void *kmem_realloc(void *, size_t, size_t, int); extern void *kmem_zalloc(size_t, int); extern void kmem_free(void *, size_t); typedef struct shrinker *kmem_shaker_t; typedef int (*kmem_shake_func_t)(int, unsigned int); static __inline kmem_shaker_t kmem_shake_register(kmem_shake_func_t sfunc) { return set_shrinker(DEFAULT_SEEKS, sfunc); } static __inline void kmem_shake_deregister(kmem_shaker_t shrinker) { remove_shrinker(shrinker); } static __inline int kmem_shake_allow(unsigned int gfp_mask) { return (gfp_mask & __GFP_WAIT); } #endif /* __XFS_SUPPORT_KMEM_H__ */