mirror of
https://git.proxmox.com/git/mirror_zfs.git
synced 2024-11-18 10:21:01 +03:00
d0249a4bd0
This change updates the documentation to refer to the project as OpenZFS instead ZFS on Linux. Web links have been updated to refer to https://github.com/openzfs/zfs. The extraneous zfsonlinux.org web links in the ZED and SPL sources have been dropped. Reviewed-by: George Melikov <mail@gmelikov.ru> Reviewed-by: Richard Laager <rlaager@wiktel.com> Reviewed-by: Ryan Moeller <ryan@iXsystems.com> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Closes #11007
216 lines
8.6 KiB
C
216 lines
8.6 KiB
C
/*
|
|
* 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).
|
|
* Written by Brian Behlendorf <behlendorf1@llnl.gov>.
|
|
* UCRL-CODE-235197
|
|
*
|
|
* This file is part of the SPL, Solaris Porting Layer.
|
|
*
|
|
* 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
|
|
* Free Software Foundation; either version 2 of the License, or (at your
|
|
* option) any later version.
|
|
*
|
|
* The SPL is distributed in the hope that it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
|
* for more details.
|
|
*
|
|
* 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_CACHE_H
|
|
#define _SPL_KMEM_CACHE_H
|
|
|
|
#include <sys/taskq.h>
|
|
|
|
/*
|
|
* 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 virtual 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
|
|
* destructors which the Linux slab does not.
|
|
*/
|
|
typedef enum kmc_bit {
|
|
KMC_BIT_NODEBUG = 1, /* Default behavior */
|
|
KMC_BIT_KVMEM = 7, /* Use kvmalloc linux allocator */
|
|
KMC_BIT_SLAB = 8, /* Use Linux slab cache */
|
|
KMC_BIT_DEADLOCKED = 14, /* Deadlock detected */
|
|
KMC_BIT_GROWING = 15, /* Growing in progress */
|
|
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 */
|
|
} kmc_bit_t;
|
|
|
|
/* 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_NODEBUG (1 << KMC_BIT_NODEBUG)
|
|
#define KMC_KVMEM (1 << KMC_BIT_KVMEM)
|
|
#define KMC_SLAB (1 << KMC_BIT_SLAB)
|
|
#define KMC_DEADLOCKED (1 << KMC_BIT_DEADLOCKED)
|
|
#define KMC_GROWING (1 << KMC_BIT_GROWING)
|
|
#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
|
|
|
|
#define KMC_RECLAIM_ONCE 0x1 /* Force a single shrinker pass */
|
|
|
|
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_OBJ_PER_SLAB 8 /* Target objects per slab */
|
|
#define SPL_KMEM_CACHE_ALIGN 8 /* Default object alignment */
|
|
#ifdef _LP64
|
|
#define SPL_KMEM_CACHE_MAX_SIZE 32 /* Max slab size in MB */
|
|
#else
|
|
#define SPL_KMEM_CACHE_MAX_SIZE 4 /* Max slab size in MB */
|
|
#endif
|
|
|
|
#define SPL_MAX_ORDER (MAX_ORDER - 3)
|
|
#define SPL_MAX_ORDER_NR_PAGES (1 << (SPL_MAX_ORDER - 1))
|
|
|
|
#ifdef CONFIG_SLUB
|
|
#define SPL_MAX_KMEM_CACHE_ORDER PAGE_ALLOC_COSTLY_ORDER
|
|
#define SPL_MAX_KMEM_ORDER_NR_PAGES (1 << (SPL_MAX_KMEM_CACHE_ORDER - 1))
|
|
#else
|
|
#define SPL_MAX_KMEM_ORDER_NR_PAGES (KMALLOC_MAX_SIZE >> PAGE_SHIFT)
|
|
#endif
|
|
|
|
#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 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 */
|
|
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_alloc {
|
|
struct spl_kmem_cache *ska_cache; /* Owned by cache */
|
|
int ska_flags; /* Allocation flags */
|
|
taskq_ent_t ska_tqe; /* Task queue entry */
|
|
} spl_kmem_alloc_t;
|
|
|
|
typedef struct spl_kmem_emergency {
|
|
struct rb_node ske_node; /* Emergency tree linkage */
|
|
unsigned long ske_obj; /* Buffer address */
|
|
} spl_kmem_emergency_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; /* 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 */
|
|
void *skc_private; /* Private data */
|
|
void *skc_vmp; /* Unused */
|
|
struct kmem_cache *skc_linux_cache; /* Linux slab cache if used */
|
|
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 */
|
|
atomic_t skc_ref; /* Ref count callers */
|
|
taskqid_t skc_taskqid; /* Slab reclaim task */
|
|
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 */
|
|
struct rb_root skc_emergency_tree; /* Min sized objects */
|
|
spinlock_t skc_lock; /* Cache lock */
|
|
spl_wait_queue_head_t skc_waitq; /* Allocation waiters */
|
|
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 */
|
|
struct percpu_counter skc_linux_alloc; /* Linux-backed Obj alloc */
|
|
uint64_t skc_obj_max; /* Obj max historic */
|
|
uint64_t skc_obj_deadlock; /* Obj emergency deadlocks */
|
|
uint64_t skc_obj_emergency; /* Obj emergency current */
|
|
uint64_t skc_obj_emergency_max; /* Obj emergency max */
|
|
} 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,
|
|
void *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_set_allocflags(spl_kmem_cache_t *skc, gfp_t flags);
|
|
extern void spl_kmem_cache_reap_now(spl_kmem_cache_t *skc);
|
|
extern void spl_kmem_reap(void);
|
|
extern uint64_t spl_kmem_cache_inuse(kmem_cache_t *cache);
|
|
extern uint64_t spl_kmem_cache_entry_size(kmem_cache_t *cache);
|
|
|
|
#define kmem_cache_create(name, size, align, ctor, dtor, rclm, priv, vmp, fl) \
|
|
spl_kmem_cache_create(name, size, align, ctor, dtor, rclm, priv, vmp, fl)
|
|
#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)
|
|
#define kmem_reap() spl_kmem_reap()
|
|
|
|
/*
|
|
* The following functions are only available for internal use.
|
|
*/
|
|
extern int spl_kmem_cache_init(void);
|
|
extern void spl_kmem_cache_fini(void);
|
|
|
|
#endif /* _SPL_KMEM_CACHE_H */
|