-/*****************************************************************************\
+/*
* Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC.
* Copyright (C) 2007 The Regents of the University of California.
* Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
* UCRL-CODE-235197
*
* This file is part of the SPL, Solaris Porting Layer.
- * For details, see <http://github.com/behlendorf/spl/>.
+ * For details, see <http://zfsonlinux.org/>.
*
* The SPL is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
*
* You should have received a copy of the GNU General Public License along
* with the SPL. If not, see <http://www.gnu.org/licenses/>.
-\*****************************************************************************/
+ */
#ifndef _SPL_KMEM_H
#define _SPL_KMEM_H
-#include <linux/module.h>
#include <linux/slab.h>
-#include <linux/vmalloc.h>
-#include <linux/mm_compat.h>
-#include <linux/spinlock.h>
-#include <linux/rwsem.h>
-#include <linux/hash.h>
-#include <linux/ctype.h>
-#include <asm/atomic.h>
-#include <sys/types.h>
-#include <sys/vmsystm.h>
-#include <sys/kstat.h>
+
+extern int kmem_debugging(void);
+extern char *kmem_vasprintf(const char *fmt, va_list ap);
+extern char *kmem_asprintf(const char *fmt, ...);
+extern char *strdup(const char *str);
+extern void strfree(char *str);
/*
* Memory allocation interfaces
*/
-#define KM_SLEEP GFP_KERNEL /* Can sleep, never fails */
-#define KM_NOSLEEP GFP_ATOMIC /* Can not sleep, may fail */
-#define KM_PUSHPAGE (GFP_NOIO | __GFP_HIGH) /* Use reserved memory */
-#define KM_NODEBUG __GFP_NOWARN /* Suppress warnings */
-#define KM_FLAGS __GFP_BITS_MASK
-#define KM_VMFLAGS GFP_LEVEL_MASK
+#define KM_SLEEP GFP_KERNEL /* Can sleep, never fails */
+#define KM_NOSLEEP GFP_ATOMIC /* Can not sleep, may fail */
+#define KM_PUSHPAGE (GFP_NOIO | __GFP_HIGH) /* Use reserved memory */
+#define KM_NODEBUG __GFP_NOWARN /* Suppress warnings */
+#define KM_FLAGS __GFP_BITS_MASK
+#define KM_VMFLAGS GFP_LEVEL_MASK
/*
* Used internally, the kernel does not need to support this flag
*/
#ifndef __GFP_ZERO
-# define __GFP_ZERO 0x8000
+#define __GFP_ZERO 0x8000
#endif
/*
ptr = kmalloc(size, flags);
} while (ptr == NULL && (flags & __GFP_WAIT));
- return ptr;
+ return (ptr);
}
static inline void *
ptr = kzalloc(size, flags);
} while (ptr == NULL && (flags & __GFP_WAIT));
- return ptr;
+ return (ptr);
}
static inline void *
kmalloc_node_nofail(size_t size, gfp_t flags, int node)
{
-#ifdef HAVE_KMALLOC_NODE
void *ptr;
do {
ptr = kmalloc_node(size, flags, node);
} while (ptr == NULL && (flags & __GFP_WAIT));
- return ptr;
-#else
- return kmalloc_nofail(size, flags);
-#endif /* HAVE_KMALLOC_NODE */
-}
-
-static inline void *
-vmalloc_nofail(size_t size, gfp_t flags)
-{
- void *ptr;
-
- /*
- * Retry failed __vmalloc() allocations once every second. The
- * rational for the delay is that the likely failure modes are:
- *
- * 1) The system has completely exhausted memory, in which case
- * delaying 1 second for the memory reclaim to run is reasonable
- * to avoid thrashing the system.
- * 2) The system has memory but has exhausted the small virtual
- * address space available on 32-bit systems. Retrying the
- * allocation immediately will only result in spinning on the
- * virtual address space lock. It is better delay a second and
- * hope that another process will free some of the address space.
- * But the bottom line is there is not much we can actually do
- * since we can never safely return a failure and honor the
- * Solaris semantics.
- */
- while (1) {
- ptr = __vmalloc(size, flags | __GFP_HIGHMEM, PAGE_KERNEL);
- if (unlikely((ptr == NULL) && (flags & __GFP_WAIT))) {
- set_current_state(TASK_INTERRUPTIBLE);
- schedule_timeout(HZ);
- } else {
- break;
- }
- }
-
- return ptr;
-}
-
-static inline void *
-vzalloc_nofail(size_t size, gfp_t flags)
-{
- void *ptr;
-
- ptr = vmalloc_nofail(size, flags);
- if (ptr)
- memset(ptr, 0, (size));
-
- return ptr;
+ return (ptr);
}
#ifdef DEBUG_KMEM
/*
* Memory accounting functions to be used only when DEBUG_KMEM is set.
*/
-# ifdef HAVE_ATOMIC64_T
-
-# define kmem_alloc_used_add(size) atomic64_add(size, &kmem_alloc_used)
-# define kmem_alloc_used_sub(size) atomic64_sub(size, &kmem_alloc_used)
-# define kmem_alloc_used_read() atomic64_read(&kmem_alloc_used)
-# define kmem_alloc_used_set(size) atomic64_set(&kmem_alloc_used, size)
-# define vmem_alloc_used_add(size) atomic64_add(size, &vmem_alloc_used)
-# define vmem_alloc_used_sub(size) atomic64_sub(size, &vmem_alloc_used)
-# define vmem_alloc_used_read() atomic64_read(&vmem_alloc_used)
-# define vmem_alloc_used_set(size) atomic64_set(&vmem_alloc_used, size)
-
+#ifdef HAVE_ATOMIC64_T
+#define kmem_alloc_used_add(size) atomic64_add(size, &kmem_alloc_used)
+#define kmem_alloc_used_sub(size) atomic64_sub(size, &kmem_alloc_used)
+#define kmem_alloc_used_read() atomic64_read(&kmem_alloc_used)
+#define kmem_alloc_used_set(size) atomic64_set(&kmem_alloc_used, size)
extern atomic64_t kmem_alloc_used;
extern unsigned long long kmem_alloc_max;
-extern atomic64_t vmem_alloc_used;
-extern unsigned long long vmem_alloc_max;
-
-# else /* HAVE_ATOMIC64_T */
-
-# define kmem_alloc_used_add(size) atomic_add(size, &kmem_alloc_used)
-# define kmem_alloc_used_sub(size) atomic_sub(size, &kmem_alloc_used)
-# define kmem_alloc_used_read() atomic_read(&kmem_alloc_used)
-# define kmem_alloc_used_set(size) atomic_set(&kmem_alloc_used, size)
-# define vmem_alloc_used_add(size) atomic_add(size, &vmem_alloc_used)
-# define vmem_alloc_used_sub(size) atomic_sub(size, &vmem_alloc_used)
-# define vmem_alloc_used_read() atomic_read(&vmem_alloc_used)
-# define vmem_alloc_used_set(size) atomic_set(&vmem_alloc_used, size)
-
+#else /* HAVE_ATOMIC64_T */
+#define kmem_alloc_used_add(size) atomic_add(size, &kmem_alloc_used)
+#define kmem_alloc_used_sub(size) atomic_sub(size, &kmem_alloc_used)
+#define kmem_alloc_used_read() atomic_read(&kmem_alloc_used)
+#define kmem_alloc_used_set(size) atomic_set(&kmem_alloc_used, size)
extern atomic_t kmem_alloc_used;
extern unsigned long long kmem_alloc_max;
-extern atomic_t vmem_alloc_used;
-extern unsigned long long vmem_alloc_max;
+#endif /* HAVE_ATOMIC64_T */
-# endif /* HAVE_ATOMIC64_T */
-
-# ifdef DEBUG_KMEM_TRACKING
+#ifdef DEBUG_KMEM_TRACKING
/*
* DEBUG_KMEM && DEBUG_KMEM_TRACKING
*
* be enabled for debugging. This feature may be enabled by passing
* --enable-debug-kmem-tracking to configure.
*/
-# define kmem_alloc(sz, fl) kmem_alloc_track((sz), (fl), \
- __FUNCTION__, __LINE__, 0, 0)
-# define kmem_zalloc(sz, fl) kmem_alloc_track((sz), (fl)|__GFP_ZERO,\
- __FUNCTION__, __LINE__, 0, 0)
-# define kmem_alloc_node(sz, fl, nd) kmem_alloc_track((sz), (fl), \
- __FUNCTION__, __LINE__, 1, nd)
-# define kmem_free(ptr, sz) kmem_free_track((ptr), (sz))
-
-# define vmem_alloc(sz, fl) vmem_alloc_track((sz), (fl), \
- __FUNCTION__, __LINE__)
-# define vmem_zalloc(sz, fl) vmem_alloc_track((sz), (fl)|__GFP_ZERO,\
- __FUNCTION__, __LINE__)
-# define vmem_free(ptr, sz) vmem_free_track((ptr), (sz))
+#define kmem_alloc(sz, fl) kmem_alloc_track((sz), (fl), \
+ __FUNCTION__, __LINE__, 0, 0)
+#define kmem_zalloc(sz, fl) kmem_alloc_track((sz), (fl)|__GFP_ZERO,\
+ __FUNCTION__, __LINE__, 0, 0)
+#define kmem_alloc_node(sz, fl, nd) kmem_alloc_track((sz), (fl), \
+ __FUNCTION__, __LINE__, 1, nd)
+#define kmem_free(ptr, sz) kmem_free_track((ptr), (sz))
extern void *kmem_alloc_track(size_t, int, const char *, int, int, int);
extern void kmem_free_track(const void *, size_t);
-extern void *vmem_alloc_track(size_t, int, const char *, int);
-extern void vmem_free_track(const void *, size_t);
-# else /* DEBUG_KMEM_TRACKING */
+#else /* DEBUG_KMEM_TRACKING */
/*
* DEBUG_KMEM && !DEBUG_KMEM_TRACKING
*
* will be reported on the console. To disable this basic accounting
* pass the --disable-debug-kmem option to configure.
*/
-# define kmem_alloc(sz, fl) kmem_alloc_debug((sz), (fl), \
- __FUNCTION__, __LINE__, 0, 0)
-# define kmem_zalloc(sz, fl) kmem_alloc_debug((sz), (fl)|__GFP_ZERO,\
- __FUNCTION__, __LINE__, 0, 0)
-# define kmem_alloc_node(sz, fl, nd) kmem_alloc_debug((sz), (fl), \
- __FUNCTION__, __LINE__, 1, nd)
-# define kmem_free(ptr, sz) kmem_free_debug((ptr), (sz))
-
-# define vmem_alloc(sz, fl) vmem_alloc_debug((sz), (fl), \
- __FUNCTION__, __LINE__)
-# define vmem_zalloc(sz, fl) vmem_alloc_debug((sz), (fl)|__GFP_ZERO,\
- __FUNCTION__, __LINE__)
-# define vmem_free(ptr, sz) vmem_free_debug((ptr), (sz))
+#define kmem_alloc(sz, fl) kmem_alloc_debug((sz), (fl), \
+ __FUNCTION__, __LINE__, 0, 0)
+#define kmem_zalloc(sz, fl) kmem_alloc_debug((sz), (fl)|__GFP_ZERO,\
+ __FUNCTION__, __LINE__, 0, 0)
+#define kmem_alloc_node(sz, fl, nd) kmem_alloc_debug((sz), (fl), \
+ __FUNCTION__, __LINE__, 1, nd)
+#define kmem_free(ptr, sz) kmem_free_debug((ptr), (sz))
extern void *kmem_alloc_debug(size_t, int, const char *, int, int, int);
extern void kmem_free_debug(const void *, size_t);
-extern void *vmem_alloc_debug(size_t, int, const char *, int);
-extern void vmem_free_debug(const void *, size_t);
-# endif /* DEBUG_KMEM_TRACKING */
+#endif /* DEBUG_KMEM_TRACKING */
#else /* DEBUG_KMEM */
/*
* !DEBUG_KMEM && !DEBUG_KMEM_TRACKING
* minimal memory accounting. To enable basic accounting pass the
* --enable-debug-kmem option to configure.
*/
-# define kmem_alloc(sz, fl) kmalloc_nofail((sz), (fl))
-# define kmem_zalloc(sz, fl) kzalloc_nofail((sz), (fl))
-# define kmem_alloc_node(sz, fl, nd) kmalloc_node_nofail((sz), (fl), (nd))
-# define kmem_free(ptr, sz) ((void)(sz), kfree(ptr))
-
-# define vmem_alloc(sz, fl) vmalloc_nofail((sz), (fl))
-# define vmem_zalloc(sz, fl) vzalloc_nofail((sz), (fl))
-# define vmem_free(ptr, sz) ((void)(sz), vfree(ptr))
+#define kmem_alloc(sz, fl) kmalloc_nofail((sz), (fl))
+#define kmem_zalloc(sz, fl) kzalloc_nofail((sz), (fl))
+#define kmem_alloc_node(sz, fl, nd) kmalloc_node_nofail((sz), (fl), (nd))
+#define kmem_free(ptr, sz) ((void)(sz), kfree(ptr))
#endif /* DEBUG_KMEM */
-extern int kmem_debugging(void);
-extern char *kmem_vasprintf(const char *fmt, va_list ap);
-extern char *kmem_asprintf(const char *fmt, ...);
-extern char *strdup(const char *str);
-extern void strfree(char *str);
-
-
-/*
- * Slab allocation interfaces. The SPL slab differs from the standard
- * Linux SLAB or SLUB primarily in that each cache may be backed by slabs
- * allocated from the physical or virtal memory address space. The virtual
- * slabs allow for good behavior when allocation large objects of identical
- * size. This slab implementation also supports both constructors and
- * destructions which the Linux slab does not.
- */
-enum {
- KMC_BIT_NOTOUCH = 0, /* Don't update ages */
- KMC_BIT_NODEBUG = 1, /* Default behavior */
- KMC_BIT_NOMAGAZINE = 2, /* XXX: Unsupported */
- KMC_BIT_NOHASH = 3, /* XXX: Unsupported */
- KMC_BIT_QCACHE = 4, /* XXX: Unsupported */
- KMC_BIT_KMEM = 5, /* Use kmem cache */
- KMC_BIT_VMEM = 6, /* Use vmem cache */
- KMC_BIT_OFFSLAB = 7, /* Objects not on slab */
- KMC_BIT_REAPING = 16, /* Reaping in progress */
- KMC_BIT_DESTROY = 17, /* Destroy in progress */
- KMC_BIT_TOTAL = 18, /* Proc handler helper bit */
- KMC_BIT_ALLOC = 19, /* Proc handler helper bit */
- KMC_BIT_MAX = 20, /* Proc handler helper bit */
-};
-
-/* kmem move callback return values */
-typedef enum kmem_cbrc {
- KMEM_CBRC_YES = 0, /* Object moved */
- KMEM_CBRC_NO = 1, /* Object not moved */
- KMEM_CBRC_LATER = 2, /* Object not moved, try again later */
- KMEM_CBRC_DONT_NEED = 3, /* Neither object is needed */
- KMEM_CBRC_DONT_KNOW = 4, /* Object unknown */
-} kmem_cbrc_t;
-
-#define KMC_NOTOUCH (1 << KMC_BIT_NOTOUCH)
-#define KMC_NODEBUG (1 << KMC_BIT_NODEBUG)
-#define KMC_NOMAGAZINE (1 << KMC_BIT_NOMAGAZINE)
-#define KMC_NOHASH (1 << KMC_BIT_NOHASH)
-#define KMC_QCACHE (1 << KMC_BIT_QCACHE)
-#define KMC_KMEM (1 << KMC_BIT_KMEM)
-#define KMC_VMEM (1 << KMC_BIT_VMEM)
-#define KMC_OFFSLAB (1 << KMC_BIT_OFFSLAB)
-#define KMC_REAPING (1 << KMC_BIT_REAPING)
-#define KMC_DESTROY (1 << KMC_BIT_DESTROY)
-#define KMC_TOTAL (1 << KMC_BIT_TOTAL)
-#define KMC_ALLOC (1 << KMC_BIT_ALLOC)
-#define KMC_MAX (1 << KMC_BIT_MAX)
-
-#define KMC_REAP_CHUNK INT_MAX
-#define KMC_DEFAULT_SEEKS 1
-
-extern struct list_head spl_kmem_cache_list;
-extern struct rw_semaphore spl_kmem_cache_sem;
-
-#define SKM_MAGIC 0x2e2e2e2e
-#define SKO_MAGIC 0x20202020
-#define SKS_MAGIC 0x22222222
-#define SKC_MAGIC 0x2c2c2c2c
-
-#define SPL_KMEM_CACHE_DELAY 15 /* Minimum slab release age */
-#define SPL_KMEM_CACHE_REAP 0 /* Default reap everything */
-#define SPL_KMEM_CACHE_OBJ_PER_SLAB 16 /* Target objects per slab */
-#define SPL_KMEM_CACHE_OBJ_PER_SLAB_MIN 8 /* Minimum objects per slab */
-#define SPL_KMEM_CACHE_ALIGN 8 /* Default object alignment */
-
-#define POINTER_IS_VALID(p) 0 /* Unimplemented */
-#define POINTER_INVALIDATE(pp) /* Unimplemented */
-
-typedef int (*spl_kmem_ctor_t)(void *, void *, int);
-typedef void (*spl_kmem_dtor_t)(void *, void *);
-typedef void (*spl_kmem_reclaim_t)(void *);
-
-typedef struct spl_kmem_magazine {
- uint32_t skm_magic; /* Sanity magic */
- uint32_t skm_avail; /* Available objects */
- uint32_t skm_size; /* Magazine size */
- uint32_t skm_refill; /* Batch refill size */
- struct spl_kmem_cache *skm_cache; /* Owned by cache */
- struct delayed_work skm_work; /* Magazine reclaim work */
- unsigned long skm_age; /* Last cache access */
- unsigned int skm_cpu; /* Owned by cpu */
- void *skm_objs[0]; /* Object pointers */
-} spl_kmem_magazine_t;
-
-typedef struct spl_kmem_obj {
- uint32_t sko_magic; /* Sanity magic */
- void *sko_addr; /* Buffer address */
- struct spl_kmem_slab *sko_slab; /* Owned by slab */
- struct list_head sko_list; /* Free object list linkage */
-} spl_kmem_obj_t;
-
-typedef struct spl_kmem_slab {
- uint32_t sks_magic; /* Sanity magic */
- uint32_t sks_objs; /* Objects per slab */
- struct spl_kmem_cache *sks_cache; /* Owned by cache */
- struct list_head sks_list; /* Slab list linkage */
- struct list_head sks_free_list; /* Free object list */
- unsigned long sks_age; /* Last modify jiffie */
- uint32_t sks_ref; /* Ref count used objects */
-} spl_kmem_slab_t;
-
-typedef struct spl_kmem_cache {
- uint32_t skc_magic; /* Sanity magic */
- uint32_t skc_name_size; /* Name length */
- char *skc_name; /* Name string */
- spl_kmem_magazine_t *skc_mag[NR_CPUS]; /* Per-CPU warm cache */
- uint32_t skc_mag_size; /* Magazine size */
- uint32_t skc_mag_refill; /* Magazine refill count */
- spl_kmem_ctor_t skc_ctor; /* Constructor */
- spl_kmem_dtor_t skc_dtor; /* Destructor */
- spl_kmem_reclaim_t skc_reclaim; /* Reclaimator */
- void *skc_private; /* Private data */
- void *skc_vmp; /* Unused */
- unsigned long skc_flags; /* Flags */
- uint32_t skc_obj_size; /* Object size */
- uint32_t skc_obj_align; /* Object alignment */
- uint32_t skc_slab_objs; /* Objects per slab */
- uint32_t skc_slab_size; /* Slab size */
- uint32_t skc_delay; /* Slab reclaim interval */
- uint32_t skc_reap; /* Slab reclaim count */
- atomic_t skc_ref; /* Ref count callers */
- struct delayed_work skc_work; /* Slab reclaim work */
- struct list_head skc_list; /* List of caches linkage */
- struct list_head skc_complete_list;/* Completely alloc'ed */
- struct list_head skc_partial_list; /* Partially alloc'ed */
- spinlock_t skc_lock; /* Cache lock */
- uint64_t skc_slab_fail; /* Slab alloc failures */
- uint64_t skc_slab_create;/* Slab creates */
- uint64_t skc_slab_destroy;/* Slab destroys */
- uint64_t skc_slab_total; /* Slab total current */
- uint64_t skc_slab_alloc; /* Slab alloc current */
- uint64_t skc_slab_max; /* Slab max historic */
- uint64_t skc_obj_total; /* Obj total current */
- uint64_t skc_obj_alloc; /* Obj alloc current */
- uint64_t skc_obj_max; /* Obj max historic */
-} spl_kmem_cache_t;
-#define kmem_cache_t spl_kmem_cache_t
-
-extern spl_kmem_cache_t *spl_kmem_cache_create(char *name, size_t size,
- size_t align, spl_kmem_ctor_t ctor, spl_kmem_dtor_t dtor,
- spl_kmem_reclaim_t reclaim, void *priv, void *vmp, int flags);
-extern void spl_kmem_cache_set_move(spl_kmem_cache_t *,
- kmem_cbrc_t (*)(void *, void *, size_t, void *));
-extern void spl_kmem_cache_destroy(spl_kmem_cache_t *skc);
-extern void *spl_kmem_cache_alloc(spl_kmem_cache_t *skc, int flags);
-extern void spl_kmem_cache_free(spl_kmem_cache_t *skc, void *obj);
-extern void spl_kmem_cache_reap_now(spl_kmem_cache_t *skc, int count);
-extern void spl_kmem_reap(void);
-
-int spl_kmem_init_kallsyms_lookup(void);
int spl_kmem_init(void);
void spl_kmem_fini(void);
-#define kmem_cache_create(name,size,align,ctor,dtor,rclm,priv,vmp,flags) \
- spl_kmem_cache_create(name,size,align,ctor,dtor,rclm,priv,vmp,flags)
-#define kmem_cache_set_move(skc, move) spl_kmem_cache_set_move(skc, move)
-#define kmem_cache_destroy(skc) spl_kmem_cache_destroy(skc)
-#define kmem_cache_alloc(skc, flags) spl_kmem_cache_alloc(skc, flags)
-#define kmem_cache_free(skc, obj) spl_kmem_cache_free(skc, obj)
-#define kmem_cache_reap_now(skc) \
- spl_kmem_cache_reap_now(skc, skc->skc_reap)
-#define kmem_reap() spl_kmem_reap()
-#define kmem_virt(ptr) (((ptr) >= (void *)VMALLOC_START) && \
- ((ptr) < (void *)VMALLOC_END))
+#define kmem_virt(ptr) (((ptr) >= (void *)VMALLOC_START) && \
+ ((ptr) < (void *)VMALLOC_END))
#endif /* _SPL_KMEM_H */
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