* in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU General Public License
- * version 2 along with this program; If not, see [sun.com URL with a
- * copy of GPLv2].
+ * 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
* GPL HEADER END
*/
/*
- * Copyright 2008 Sun Microsystems, Inc. All rights reserved
+ * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*/
/*
#ifndef LIBLUSTRE_H__
#define LIBLUSTRE_H__
-#ifdef __KERNEL__
-#error Kernel files should not #include <liblustre.h>
-#else
-/*
- * The userspace implementations of linux/spinlock.h vary; we just
- * include our own for all of them
+/** \defgroup liblustre liblustre
+ *
+ * @{
*/
-#define __LINUX_SPINLOCK_H
-#endif
-
-#include <libcfs/libcfs.h>
-#include <lnet/lnet.h>
-#include <libcfs/user-bitops.h>
-
-#include <sys/mman.h>
-#ifdef HAVE_STDINT_H
-# include <stdint.h>
-#endif
-#ifdef HAVE_ASM_PAGE_H
-# include <asm/page.h>
-#endif
-#ifdef HAVE_SYS_USER_H
-# include <sys/user.h>
-#endif
-#ifdef HAVE_SYS_IOCTL_H
-# include <sys/ioctl.h>
-#endif
+#include <fcntl.h>
+#include <sys/queue.h>
-#include <stdio.h>
-#include <sys/ioctl.h>
-#include <stdlib.h>
-#include <string.h>
-#include <errno.h>
-#include <sys/stat.h>
-#ifdef HAVE_SYS_VFS_H
-# include <sys/vfs.h>
+#ifdef __KERNEL__
+#error Kernel files should not #include <liblustre.h>
#endif
-#include <unistd.h>
-#include <fcntl.h>
-#include <assert.h>
#include <libcfs/libcfs.h>
-#include <libcfs/list.h>
#include <lnet/lnet.h>
-#include <libcfs/user-bitops.h>
-
-#ifndef _IOWR
-# include "ioctl.h"
-#endif
/* definitions for liblustre */
#define loff_t long long
#define ERESTART 2001
-typedef unsigned short umode_t;
-
-#endif
+typedef unsigned short cfs_umode_t;
-
-#ifndef ARRAY_SIZE
-#define ARRAY_SIZE(a) ((sizeof (a))/(sizeof ((a)[0])))
-#endif
-
-/* This is because lprocfs_status.h gets included here indirectly. It would
- * be much better to just avoid lprocfs being included into liblustre entirely
- * but that requires more header surgery than I can handle right now.
- */
-#ifndef smp_processor_id
-#define smp_processor_id() 0
-#endif
-#ifndef num_online_cpus
-#define num_online_cpus() 1
-#endif
-#ifndef num_possible_cpus
-#define num_possible_cpus() 1
#endif
/* always adopt 2.5 definitions */
#endif
+/*
+ * The inter_module_get implementation is specific to liblustre, so this needs
+ * to stay here for now.
+ */
static inline void inter_module_put(void *a)
{
return;
}
-
void *inter_module_get(char *arg);
-/* cheats for now */
-
-struct work_struct {
- void (*ws_task)(void *arg);
- void *ws_arg;
-};
-
-static inline void prepare_work(struct work_struct *q, void (*t)(void *),
- void *arg)
-{
- q->ws_task = t;
- q->ws_arg = arg;
- return;
-}
-
-static inline void schedule_work(struct work_struct *q)
-{
- q->ws_task(q->ws_arg);
-}
-
-
-#define strnlen(a,b) strlen(a)
-static inline void *kmalloc(int size, int prot)
-{
- return malloc(size);
-}
-#define vmalloc malloc
-#define vfree free
-#define kfree(a) free(a)
-#define GFP_KERNEL 1
-#define GFP_HIGHUSER 1
-#define GFP_ATOMIC 1
-#define GFP_NOFS 1
-#define IS_ERR(a) ((unsigned long)(a) > (unsigned long)-1000L)
-#define PTR_ERR(a) ((long)(a))
-#define ERR_PTR(a) ((void*)((long)(a)))
-
-typedef int (read_proc_t)(char *page, char **start, off_t off,
- int count, int *eof, void *data);
-
-struct file; /* forward ref */
-typedef int (write_proc_t)(struct file *file, const char *buffer,
- unsigned long count, void *data);
-
/* bits ops */
/* a long can be more than 32 bits, so use BITS_PER_LONG
static __inline__ int ext2_set_bit(int nr, void *addr)
{
- return set_bit(nr, addr);
+#ifdef __BIG_ENDIAN
+ return cfs_set_bit((nr ^ ((BITS_PER_LONG-1) & ~0x7)), addr);
+#else
+ return cfs_set_bit(nr, addr);
+#endif
}
static __inline__ int ext2_clear_bit(int nr, void *addr)
{
- return clear_bit(nr, addr);
+#ifdef __BIG_ENDIAN
+ return cfs_clear_bit((nr ^ ((BITS_PER_LONG-1) & ~0x7)), addr);
+#else
+ return cfs_clear_bit(nr, addr);
+#endif
}
static __inline__ int ext2_test_bit(int nr, void *addr)
{
- return test_bit(nr, addr);
-}
-
-/* modules */
-
-struct module {
- int count;
-};
-
-static inline void MODULE_AUTHOR(char *name)
-{
- printf("%s\n", name);
-}
-#define MODULE_DESCRIPTION(name) MODULE_AUTHOR(name)
-#define MODULE_LICENSE(name) MODULE_AUTHOR(name)
-
-#define THIS_MODULE NULL
-#define __init
-#define __exit
-
-/* devices */
-
-static inline int misc_register(void *foo)
-{
- return 0;
-}
-
-static inline int misc_deregister(void *foo)
-{
- return 0;
-}
-
-static inline int request_module(char *name)
-{
- return (-EINVAL);
-}
-
-#define __MOD_INC_USE_COUNT(m) do {} while (0)
-#define __MOD_DEC_USE_COUNT(m) do {} while (0)
-#define MOD_INC_USE_COUNT do {} while (0)
-#define MOD_DEC_USE_COUNT do {} while (0)
-static inline void __module_get(struct module *module)
-{
-}
-
-static inline int try_module_get(struct module *module)
-{
- return 1;
+#ifdef __BIG_ENDIAN
+ __const__ unsigned char *tmp = (__const__ unsigned char *) addr;
+ return (tmp[nr >> 3] >> (nr & 7)) & 1;
+#else
+ return cfs_test_bit(nr, addr);
+#endif
}
-static inline void module_put(struct module *module)
-{
-}
/* module initialization */
extern int init_obdclass(void);
#define EXPORT_SYMBOL(S)
-struct rcu_head { };
-
-typedef struct { } spinlock_t;
typedef __u64 kdev_t;
-#define SPIN_LOCK_UNLOCKED (spinlock_t) { }
-#define LASSERT_SPIN_LOCKED(lock) do {} while(0)
-#define LASSERT_SEM_LOCKED(sem) do {} while(0)
-
-static inline void spin_lock(spinlock_t *l) {return;}
-static inline void spin_unlock(spinlock_t *l) {return;}
-static inline void spin_lock_init(spinlock_t *l) {return;}
-static inline void local_irq_save(unsigned long flag) {return;}
-static inline void local_irq_restore(unsigned long flag) {return;}
-static inline int spin_is_locked(spinlock_t *l) {return 1;}
-
-static inline void spin_lock_bh(spinlock_t *l) {}
-static inline void spin_unlock_bh(spinlock_t *l) {}
-static inline void spin_lock_irqsave(spinlock_t *a, unsigned long b) {}
-static inline void spin_unlock_irqrestore(spinlock_t *a, unsigned long b) {}
-
-typedef spinlock_t rwlock_t;
-#define RW_LOCK_UNLOCKED SPIN_LOCK_UNLOCKED
-#define read_lock(l) spin_lock(l)
-#define read_unlock(l) spin_unlock(l)
-#define write_lock(l) spin_lock(l)
-#define write_unlock(l) spin_unlock(l)
-#define rwlock_init(l) spin_lock_init(l)
-
+#ifndef min
#define min(x,y) ((x)<(y) ? (x) : (y))
+#endif
+
+#ifndef max
#define max(x,y) ((x)>(y) ? (x) : (y))
+#endif
#ifndef min_t
#define min_t(type,x,y) \
#ifndef ERESTARTSYS
#define ERESTARTSYS ERESTART
#endif
-#define HZ 1
+#define CFS_HZ 1
/* random */
-void get_random_bytes(void *ptr, int size);
+void cfs_get_random_bytes(void *ptr, int size);
/* memory */
/* memory size: used for some client tunables */
-#define num_physpages (256 * 1024) /* 1GB */
-
-static inline int copy_from_user(void *a,void *b, int c)
-{
- memcpy(a,b,c);
- return 0;
-}
-
-static inline int copy_to_user(void *a,void *b, int c)
-{
- memcpy(a,b,c);
- return 0;
-}
-
-
-/* slabs */
-typedef struct {
- int size;
-} kmem_cache_t;
-#define SLAB_HWCACHE_ALIGN 0
-static inline kmem_cache_t *
-kmem_cache_create(const char *name, size_t objsize, size_t cdum,
- unsigned long d,
- void (*e)(void *, kmem_cache_t *, unsigned long),
- void (*f)(void *, kmem_cache_t *, unsigned long))
-{
- kmem_cache_t *c;
- c = malloc(sizeof(*c));
- if (!c)
- return NULL;
- c->size = objsize;
- CDEBUG(D_MALLOC, "alloc slab cache %s at %p, objsize %d\n",
- name, c, (int)objsize);
- return c;
-};
-
-static inline int kmem_cache_destroy(kmem_cache_t *a)
-{
- CDEBUG(D_MALLOC, "destroy slab cache %p, objsize %u\n", a, a->size);
- free(a);
- return 0;
-}
-
-/* struct page decl moved out from here into portals/include/libcfs/user-prim.h */
-
-/* 2.4 defines */
-#define PAGE_LIST_ENTRY list
-#define PAGE_LIST(page) ((page)->list)
+#define cfs_num_physpages (256 * 1024) /* 1GB */
+#define CFS_NUM_CACHEPAGES cfs_num_physpages
-#define kmap(page) (page)->addr
-#define kunmap(a) do {} while (0)
-
-static inline cfs_page_t *alloc_pages(int mask, unsigned long order)
-{
- cfs_page_t *pg = malloc(sizeof(*pg));
-
- if (!pg)
- return NULL;
-#if 0 //#ifdef MAP_ANONYMOUS
- pg->addr = mmap(0, PAGE_SIZE << order, PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
-#else
- pg->addr = malloc(CFS_PAGE_SIZE << order);
-#endif
-
- if (!pg->addr) {
- free(pg);
- return NULL;
- }
- return pg;
-}
-#define cfs_alloc_pages(mask, order) alloc_pages((mask), (order))
-
-#define alloc_page(mask) alloc_pages((mask), 0)
-#define cfs_alloc_page(mask) alloc_page(mask)
-
-static inline void __free_pages(cfs_page_t *pg, int what)
-{
-#if 0 //#ifdef MAP_ANONYMOUS
- munmap(pg->addr, PAGE_SIZE);
-#else
- free(pg->addr);
-#endif
- free(pg);
-}
-#define __cfs_free_pages(pg, order) __free_pages((pg), (order))
-
-#define __free_page(page) __free_pages((page), 0)
-#define free_page(page) __free_page(page)
-#define __cfs_free_page(page) __cfs_free_pages((page), 0)
-
-static inline cfs_page_t* __grab_cache_page(unsigned long index)
-{
- cfs_page_t *pg = alloc_pages(0, 0);
-
- if (pg)
- pg->index = index;
- return pg;
-}
-
-#define grab_cache_page(index) __grab_cache_page(index)
-#define page_cache_release(page) __free_pages(page, 0)
-
-/* arithmetic */
-#define do_div(a,b) \
- ({ \
- unsigned long remainder;\
- remainder = (a) % (b); \
- (a) = (a) / (b); \
- (remainder); \
- })
/* VFS stuff */
#define ATTR_MODE 0x0001
struct iattr {
unsigned int ia_valid;
- umode_t ia_mode;
+ cfs_umode_t ia_mode;
uid_t ia_uid;
gid_t ia_gid;
loff_t ia_size;
void *pwd;
};
-/* semaphores */
-struct rw_semaphore {
- int count;
-};
-
-/* semaphores */
-struct semaphore {
- int count;
-};
-
-/* use the macro's argument to avoid unused warnings */
-#define down(a) do { (void)a; } while (0)
-#define mutex_down(a) down(a)
-#define up(a) do { (void)a; } while (0)
-#define mutex_up(a) up(a)
-#define down_read(a) do { (void)a; } while (0)
-#define up_read(a) do { (void)a; } while (0)
-#define down_write(a) do { (void)a; } while (0)
-#define up_write(a) do { (void)a; } while (0)
-#define sema_init(a,b) do { (void)a; } while (0)
-#define init_rwsem(a) do { (void)a; } while (0)
-#define DECLARE_MUTEX(name) \
- struct semaphore name = { 1 }
-static inline void init_MUTEX (struct semaphore *sem)
-{
- sema_init(sem, 1);
-}
-static inline void init_MUTEX_LOCKED (struct semaphore *sem)
-{
- sema_init(sem, 0);
-}
-
-#define init_mutex(s) init_MUTEX(s)
-
-typedef struct {
- struct list_head sleepers;
-} wait_queue_head_t;
-
-typedef struct {
- struct list_head sleeping;
- void *process;
-} wait_queue_t;
-
struct signal {
int signal;
};
__u32 cap_effective;
};
+
typedef struct task_struct cfs_task_t;
#define cfs_current() current
#define cfs_curproc_pid() (current->pid)
#define cfs_curproc_comm() (current->comm)
+#define cfs_curproc_fsuid() (current->fsuid)
+#define cfs_curproc_fsgid() (current->fsgid)
extern struct task_struct *current;
-int in_group_p(gid_t gid);
-static inline int capable(int cap)
-{
- if (current->cap_effective & (1 << cap))
- return 1;
- else
- return 0;
-}
+int cfs_curproc_is_in_groups(gid_t gid);
+
+#define cfs_set_current_state(foo) do { current->state = foo; } while (0)
-#define set_current_state(foo) do { current->state = foo; } while (0)
-
-#define init_waitqueue_entry(q,p) do { (q)->process = p; } while (0)
-#define add_wait_queue(q,p) do { list_add(&(q)->sleepers, &(p)->sleeping); } while (0)
-#define del_wait_queue(p) do { list_del(&(p)->sleeping); } while (0)
-#define remove_wait_queue(q,p) do { list_del(&(p)->sleeping); } while (0)
-
-#define DECLARE_WAIT_QUEUE_HEAD(HEAD) \
- wait_queue_head_t HEAD = { \
- .sleepers = CFS_LIST_HEAD_INIT(HEAD.sleepers) \
- }
-#define init_waitqueue_head(l) CFS_INIT_LIST_HEAD(&(l)->sleepers)
-#define wake_up(l) do { } while (0)
-#define TASK_INTERRUPTIBLE 0
-#define TASK_UNINTERRUPTIBLE 1
-#define TASK_RUNNING 2
-
-#define wait_event_interruptible(wq, condition) \
-({ \
+#define cfs_wait_event_interruptible(wq, condition, ret) \
+{ \
struct l_wait_info lwi; \
int timeout = 100000000;/* for ever */ \
int ret; \
ret = l_wait_event(NULL, condition, &lwi); \
\
ret; \
-})
-
-#define in_interrupt() (0)
-
-#define schedule() do {} while (0)
-static inline int schedule_timeout(signed long t)
-{
- return 0;
}
-#define lock_kernel() do {} while (0)
-#define unlock_kernel() do {} while (0)
+#define cfs_lock_kernel() do {} while (0)
+#define cfs_unlock_kernel() do {} while (0)
#define daemonize(l) do {} while (0)
#define sigfillset(l) do {} while (0)
#define recalc_sigpending(l) do {} while (0)
-#define kernel_thread(l,m,n) LBUG()
#define USERMODEHELPER(path, argv, envp) (0)
#define SIGNAL_MASK_ASSERT()
-#define KERN_INFO
+#define CFS_KERN_INFO
-#include <sys/time.h>
-#if HZ != 1
+#if CFS_HZ != 1
#error "liblustre's jiffies currently expects HZ to be 1"
#endif
#define jiffies \
_ret; \
})
#define get_jiffies_64() (__u64)jiffies
-#define time_after(a, b) ((long)(b) - (long)(a) < 0)
-#define time_before(a, b) time_after(b,a)
-#define time_after_eq(a,b) ((long)(a) - (long)(b) >= 0)
-
-struct timer_list {
- struct list_head tl_list;
- void (*function)(unsigned long unused);
- unsigned long data;
- long expires;
-};
-
-static inline int timer_pending(struct timer_list *l)
-{
- if (time_after(l->expires, jiffies))
- return 1;
- else
- return 0;
-}
-
-static inline int init_timer(struct timer_list *l)
-{
- CFS_INIT_LIST_HEAD(&l->tl_list);
- return 0;
-}
-
-static inline void mod_timer(struct timer_list *l, int thetime)
-{
- l->expires = thetime;
-}
-
-static inline void del_timer(struct timer_list *l)
-{
- free(l);
-}
-
-typedef struct { volatile int counter; } atomic_t;
-
-#define ATOMIC_INIT(i) { (i) }
-
-#define atomic_read(a) ((a)->counter)
-#define atomic_set(a,b) do {(a)->counter = b; } while (0)
-#define atomic_dec_and_test(a) ((--((a)->counter)) == 0)
-#define atomic_dec_and_lock(a,b) ((--((a)->counter)) == 0)
-#define atomic_inc(a) (((a)->counter)++)
-#define atomic_dec(a) do { (a)->counter--; } while (0)
-#define atomic_add(b,a) do {(a)->counter += b;} while (0)
-#define atomic_add_return(n,a) ((a)->counter += n)
-#define atomic_inc_return(a) atomic_add_return(1,a)
-#define atomic_sub(b,a) do {(a)->counter -= b;} while (0)
-#define atomic_sub_return(n,a) ((a)->counter -= n)
-#define atomic_dec_return(a) atomic_sub_return(1,a)
#ifndef likely
#define likely(exp) (exp)
#define unlikely(exp) (exp)
#endif
-#define might_sleep()
+#define cfs_might_sleep()
#define might_sleep_if(c)
#define smp_mb()
-static inline
-int test_and_set_bit(int nr, unsigned long *addr)
-{
- int oldbit;
-
- while (nr >= sizeof(long)) {
- nr -= sizeof(long);
- addr++;
- }
-
- oldbit = (*addr) & (1 << nr);
- *addr |= (1 << nr);
- return oldbit;
-}
-
-static inline
-int test_and_clear_bit(int nr, unsigned long *addr)
-{
- int oldbit;
-
- while (nr >= sizeof(long)) {
- nr -= sizeof(long);
- addr++;
- }
-
- oldbit = (*addr) & (1 << nr);
- *addr &= ~(1 << nr);
- return oldbit;
-}
-
/* FIXME sys/capability will finally included linux/fs.h thus
* cause numerous trouble on x86-64. as temporary solution for
* build broken at Cray, we copy definition we need from capability.h
CAP_SET=1
} cap_flag_value_t;
-#define CAP_DAC_OVERRIDE 1
-#define CAP_DAC_READ_SEARCH 2
-#define CAP_FOWNER 3
-#define CAP_FSETID 4
-#define CAP_SYS_ADMIN 21
-
cap_t cap_get_proc(void);
int cap_get_flag(cap_t, cap_value_t, cap_flag_t, cap_flag_value_t *);
static inline void libcfs_run_lbug_upcall(char *file, const char *fn,
const int l){}
-/* completion */
-struct completion {
- unsigned int done;
- cfs_waitq_t wait;
-};
-
-#define COMPLETION_INITIALIZER(work) \
- { 0, __WAIT_QUEUE_HEAD_INITIALIZER((work).wait) }
-
-#define DECLARE_COMPLETION(work) \
- struct completion work = COMPLETION_INITIALIZER(work)
-
-#define INIT_COMPLETION(x) ((x).done = 0)
-
-static inline void init_completion(struct completion *x)
-{
- x->done = 0;
- init_waitqueue_head(&x->wait);
-}
struct liblustre_wait_callback {
- struct list_head llwc_list;
- const char *llwc_name;
- int (*llwc_fn)(void *arg);
- void *llwc_arg;
+ cfs_list_t llwc_list;
+ const char *llwc_name;
+ int (*llwc_fn)(void *arg);
+ void *llwc_arg;
};
void *liblustre_register_wait_callback(const char *name,
void liblustre_deregister_wait_callback(void *notifier);
int liblustre_wait_event(int timeout);
-void *liblustre_register_idle_callback(const char *name,
+void *liblustre_register_idle_callback(const char *name,
int (*fn)(void *arg), void *arg);
void liblustre_deregister_idle_callback(void *notifier);
void liblustre_wait_idle(void);
};
typedef struct file_lock {
- struct file_lock *fl_next; /* singly linked list for this inode */
- struct list_head fl_link; /* doubly linked list of all locks */
- struct list_head fl_block; /* circular list of blocked processes */
+ struct file_lock *fl_next; /* singly linked list for this inode */
+ cfs_list_t fl_link; /* doubly linked list of all locks */
+ cfs_list_t fl_block; /* circular list of blocked processes */
void *fl_owner;
unsigned int fl_pid;
cfs_waitq_t fl_wait;
#define OFFSET_MAX INT_LIMIT(loff_t)
#endif
+#define i_atime i_stbuf.st_atime
+#define i_mtime i_stbuf.st_mtime
+#define i_ctime i_stbuf.st_ctime
+#define i_size i_stbuf.st_size
+#define i_blocks i_stbuf.st_blocks
+#define i_blksize i_stbuf.st_blksize
+#define i_mode i_stbuf.st_mode
+#define i_uid i_stbuf.st_uid
+#define i_gid i_stbuf.st_gid
+
/* XXX: defined in kernel */
#define FL_POSIX 1
#define FL_SLEEP 128
};
struct posix_acl {
- atomic_t a_refcount;
+ cfs_atomic_t a_refcount;
unsigned int a_count;
struct posix_acl_entry a_entries[0];
};
}
#ifdef LIBLUSTRE_POSIX_ACL
-# ifndef posix_acl_xattr_entry
+# ifndef posix_acl_xattr_entry
# define posix_acl_xattr_entry xattr_acl_entry
# endif
-# ifndef posix_acl_xattr_header
+# ifndef posix_acl_xattr_header
# define posix_acl_xattr_header xattr_acl_header
# endif
# ifndef posix_acl_xattr_size
{
}
+#define S_IRWXUGO (S_IRWXU|S_IRWXG|S_IRWXO)
+#define S_IALLUGO (S_ISUID|S_ISGID|S_ISVTX|S_IRWXUGO)
+
#include <obd_support.h>
#include <lustre/lustre_idl.h>
#include <lustre_lib.h>
#include <lustre_export.h>
#include <lustre_net.h>
-/* Fast hashing routine for a long.
- (C) 2002 William Lee Irwin III, IBM */
-
-/*
- * Knuth recommends primes in approximately golden ratio to the maximum
- * integer representable by a machine word for multiplicative hashing.
- * Chuck Lever verified the effectiveness of this technique:
- * http://www.citi.umich.edu/techreports/reports/citi-tr-00-1.pdf
- *
- * These primes are chosen to be bit-sparse, that is operations on
- * them can use shifts and additions instead of multiplications for
- * machines where multiplications are slow.
- */
-#if BITS_PER_LONG == 32
-/* 2^31 + 2^29 - 2^25 + 2^22 - 2^19 - 2^16 + 1 */
-#define GOLDEN_RATIO_PRIME 0x9e370001UL
-#elif BITS_PER_LONG == 64
-/* 2^63 + 2^61 - 2^57 + 2^54 - 2^51 - 2^18 + 1 */
-#define GOLDEN_RATIO_PRIME 0x9e37fffffffc0001UL
-#else
-#error Define GOLDEN_RATIO_PRIME for your wordsize.
-#endif
-
-static inline unsigned long hash_long(unsigned long val, unsigned int bits)
-{
- unsigned long hash = val;
-
-#if BITS_PER_LONG == 64
- /* Sigh, gcc can't optimise this alone like it does for 32 bits. */
- unsigned long n = hash;
- n <<= 18;
- hash -= n;
- n <<= 33;
- hash -= n;
- n <<= 3;
- hash += n;
- n <<= 3;
- hash -= n;
- n <<= 4;
- hash += n;
- n <<= 2;
- hash += n;
-#else
- /* On some cpus multiply is faster, on others gcc will do shifts */
- hash *= GOLDEN_RATIO_PRIME;
-#endif
-
- /* High bits are more random, so use them. */
- return hash >> (BITS_PER_LONG - bits);
-}
-
-static inline unsigned long hash_ptr(void *ptr, unsigned int bits)
-{
- return hash_long((unsigned long)ptr, bits);
-}
+/** @} liblustre */
#endif
git://git.whamcloud.com / fs / lustre-release.git / blobdiff