+++ /dev/null
-/*
- * GPL HEADER START
- *
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 only,
- * as published by the Free Software Foundation.
- *
- * This program 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 version 2 for more details (a copy is included
- * 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
- * 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.
- *
- * GPL HEADER END
- */
-/*
- * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
- * Use is subject to license terms.
- *
- * Copyright (c) 2012, Intel Corporation.
- */
-/*
- * This file is part of Lustre, http://www.lustre.org/
- * Lustre is a trademark of Sun Microsystems, Inc.
- *
- * libcfs/include/libcfs/linux/linux-lock.h
- *
- * Basic library routines.
- */
-
-#ifndef __LIBCFS_LINUX_CFS_LOCK_H__
-#define __LIBCFS_LINUX_CFS_LOCK_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/mutex.h>
-
-/*
- * IMPORTANT !!!!!!!!
- *
- * All locks' declaration are not guaranteed to be initialized,
- * Althought some of they are initialized in Linux. All locks
- * declared by CFS_DECL_* should be initialized explicitly.
- */
-
-/*
- * spin_lock "implementation" (use Linux kernel's primitives)
- *
- * - spin_lock_init(x)
- * - spin_lock(x)
- * - spin_lock_bh(x)
- * - spin_lock_bh_init(x)
- * - spin_unlock(x)
- * - spin_unlock_bh(x)
- * - spin_trylock(x)
- * - assert_spin_locked(x)
- *
- * - spin_lock_irq(x)
- * - spin_lock_irqsave(x, f)
- * - spin_unlock_irqrestore(x, f)
- * - read_lock_irqsave(lock, f)
- * - write_lock_irqsave(lock, f)
- * - write_unlock_irqrestore(lock, f)
- */
-
-/*
- * spinlock "implementation"
- */
-
-
-
-
-/*
- * rw_semaphore "implementation" (use Linux kernel's primitives)
- *
- * - sema_init(x)
- * - init_rwsem(x)
- * - down_read(x)
- * - up_read(x)
- * - down_write(x)
- * - up_write(x)
- */
-
-
-#define fini_rwsem(s) do {} while (0)
-
-
-/*
- * rwlock_t "implementation" (use Linux kernel's primitives)
- *
- * - rwlock_init(x)
- * - read_lock(x)
- * - read_unlock(x)
- * - write_lock(x)
- * - write_unlock(x)
- * - write_lock_bh(x)
- * - write_unlock_bh(x)
- *
- * - RW_LOCK_UNLOCKED
- */
-
-
-#ifndef DEFINE_RWLOCK
-#define DEFINE_RWLOCK(lock) rwlock_t lock = __RW_LOCK_UNLOCKED(lock)
-#endif
-
-/*
- * completion "implementation" (use Linux kernel's primitives)
- *
- * - DECLARE_COMPLETION(work)
- * - INIT_COMPLETION(c)
- * - COMPLETION_INITIALIZER(work)
- * - init_completion(c)
- * - complete(c)
- * - wait_for_completion(c)
- * - wait_for_completion_interruptible(c)
- * - fini_completion(c)
- */
-#define fini_completion(c) do { } while (0)
-
-/*
- * semaphore "implementation" (use Linux kernel's primitives)
- * - DEFINE_SEMAPHORE(name)
- * - sema_init(sem, val)
- * - up(sem)
- * - down(sem)
- * - down_interruptible(sem)
- * - down_trylock(sem)
- */
-
-/*
- * mutex "implementation" (use Linux kernel's primitives)
- *
- * - DEFINE_MUTEX(name)
- * - mutex_init(x)
- * - mutex_lock(x)
- * - mutex_unlock(x)
- * - mutex_trylock(x)
- * - mutex_is_locked(x)
- * - mutex_destroy(x)
- */
-
-#ifndef lockdep_set_class
-
-/**************************************************************************
- *
- * Lockdep "implementation". Also see liblustre.h
- *
- **************************************************************************/
-
-struct lock_class_key {
- ;
-};
-
-#define lockdep_set_class(lock, key) \
- do { (void)sizeof(lock); (void)sizeof(key); } while (0)
-/* This has to be a macro, so that `subclass' can be undefined in kernels
- * that do not support lockdep. */
-
-
-static inline void lockdep_off(void)
-{
-}
-
-static inline void lockdep_on(void)
-{
-}
-#else
-
-#endif /* lockdep_set_class */
-
-#ifndef CONFIG_DEBUG_LOCK_ALLOC
-#ifndef mutex_lock_nested
-#define mutex_lock_nested(mutex, subclass) mutex_lock(mutex)
-#endif
-
-#ifndef spin_lock_nested
-#define spin_lock_nested(lock, subclass) spin_lock(lock)
-#endif
-
-#ifndef down_read_nested
-#define down_read_nested(lock, subclass) down_read(lock)
-#endif
-
-#ifndef down_write_nested
-#define down_write_nested(lock, subclass) down_write(lock)
-#endif
-#endif /* CONFIG_DEBUG_LOCK_ALLOC */
-
-
-#endif /* __LIBCFS_LINUX_CFS_LOCK_H__ */
+++ /dev/null
-/*
- * GPL HEADER START
- *
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 only,
- * as published by the Free Software Foundation.
- *
- * This program 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 version 2 for more details (a copy is included
- * 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
- * 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.
- *
- * GPL HEADER END
- */
-/*
- * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
- * Use is subject to license terms.
- *
- * Copyright (c) 2012, 2013, Intel Corporation.
- */
-/*
- * This file is part of Lustre, http://www.lustre.org/
- * Lustre is a trademark of Sun Microsystems, Inc.
- *
- * libcfs/include/libcfs/user-lock.h
- *
- * Author: Nikita Danilov <nikita@clusterfs.com>
- */
-
-#ifndef __LIBCFS_USER_LOCK_H__
-#define __LIBCFS_USER_LOCK_H__
-
-#ifndef __LIBCFS_LIBCFS_H__
-#error Do not #include this file directly. #include <libcfs/libcfs.h> instead
-#endif
-
-/* Implementations of portable synchronization APIs for liblustre */
-
-/*
- * liblustre is single-threaded, so most "synchronization" APIs are trivial.
- *
- * XXX Liang: There are several branches share lnet with b_hd_newconfig,
- * if we define lock APIs at here, there will be conflict with liblustre
- * in other branches.
- */
-
-#ifndef __KERNEL__
-
-/*
- * The userspace implementations of linux/spinlock.h vary; we just
- * include our own for all of them
- */
-#define __LINUX_SPINLOCK_H
-
-/*
- * Optional debugging (magic stamping and checking ownership) can be added.
- */
-
-/*
- * spin_lock
- *
- * - spin_lock_init(x)
- * - spin_lock(x)
- * - spin_unlock(x)
- * - spin_trylock(x)
- * - spin_lock_bh_init(x)
- * - spin_lock_bh(x)
- * - spin_unlock_bh(x)
- *
- * - assert_spin_locked(x)
- * - spin_lock_irqsave(x, f)
- * - spin_unlock_irqrestore(x, f)
- *
- * No-op implementation.
- */
-struct spin_lock { int foo; };
-
-typedef struct spin_lock spinlock_t;
-
-#define DEFINE_SPINLOCK(lock) spinlock_t lock = { }
-#define __SPIN_LOCK_UNLOCKED(x) ((spinlock_t) {})
-
-void spin_lock_init(spinlock_t *lock);
-void spin_lock(spinlock_t *lock);
-void spin_unlock(spinlock_t *lock);
-int spin_trylock(spinlock_t *lock);
-void spin_lock_bh_init(spinlock_t *lock);
-void spin_lock_bh(spinlock_t *lock);
-void spin_unlock_bh(spinlock_t *lock);
-
-static inline void spin_lock_irqsave(spinlock_t *l, unsigned long f) {}
-static inline void spin_unlock_irqrestore(spinlock_t *l, unsigned long f) {}
-
-#define assert_spin_locked(lock) do { (void)(lock); } while (0)
-
-/*
- * Semaphore
- *
- * - sema_init(x, v)
- * - __down(x)
- * - __up(x)
- */
-struct semaphore {
- int foo;
-};
-
-void sema_init(struct semaphore *s, int val);
-void __up(struct semaphore *s);
-void __down(struct semaphore *s);
-int __down_interruptible(struct semaphore *s);
-
-#define DEFINE_SEMAPHORE(name) struct semaphore name = { 1 }
-
-#define up(s) __up(s)
-#define down(s) __down(s)
-#define down_interruptible(s) __down_interruptible(s)
-
-static inline int down_trylock(struct semaphore *sem)
-{
- return 0;
-}
-
-/*
- * Completion:
- *
- * - init_completion_module(c)
- * - call_wait_handler(t)
- * - init_completion(c)
- * - complete(c)
- * - wait_for_completion(c)
- * - wait_for_completion_interruptible(c)
- */
-#ifdef HAVE_LIBPTHREAD
-#include <pthread.h>
-
-/*
- * Multi-threaded user space completion APIs
- */
-
-struct completion {
- int c_done;
- pthread_cond_t c_cond;
- pthread_mutex_t c_mut;
-};
-
-#else /* !HAVE_LIBPTHREAD */
-
-struct completion {
- unsigned int done;
- wait_queue_head_t wait;
-};
-#endif /* HAVE_LIBPTHREAD */
-
-typedef int (*wait_handler_t) (int timeout);
-void init_completion_module(wait_handler_t handler);
-int call_wait_handler(int timeout);
-void init_completion(struct completion *c);
-void fini_completion(struct completion *c);
-void complete(struct completion *c);
-void wait_for_completion(struct completion *c);
-int wait_for_completion_interruptible(struct completion *c);
-
-#define COMPLETION_INITIALIZER(work) \
- { 0, __WAIT_QUEUE_HEAD_INITIALIZER((work).wait) }
-
-
-#define INIT_COMPLETION(x) ((x).done = 0)
-
-
-/*
- * rw_semaphore:
- *
- * - init_rwsem(x)
- * - down_read(x)
- * - down_read_trylock(x)
- * - down_write(struct rw_semaphore *s);
- * - down_write_trylock(struct rw_semaphore *s);
- * - up_read(x)
- * - up_write(x)
- * - fini_rwsem(x)
- */
-struct rw_semaphore {
- int foo;
-};
-
-void init_rwsem(struct rw_semaphore *s);
-void down_read(struct rw_semaphore *s);
-int down_read_trylock(struct rw_semaphore *s);
-void down_write(struct rw_semaphore *s);
-void downgrade_write(struct rw_semaphore *s);
-int down_write_trylock(struct rw_semaphore *s);
-void up_read(struct rw_semaphore *s);
-void up_write(struct rw_semaphore *s);
-void fini_rwsem(struct rw_semaphore *s);
-#define DECLARE_RWSEM(name) struct rw_semaphore name = { }
-
-/*
- * read-write lock : Need to be investigated more!!
- * XXX nikita: for now, let rwlock_t to be identical to rw_semaphore
- *
- * - rwlock_init(x)
- * - read_lock(x)
- * - read_unlock(x)
- * - write_lock(x)
- * - write_unlock(x)
- * - write_lock_irqsave(x)
- * - write_unlock_irqrestore(x)
- * - read_lock_irqsave(x)
- * - read_unlock_irqrestore(x)
- */
-#define rwlock_t struct rw_semaphore
-#define DEFINE_RWLOCK(lock) rwlock_t lock = { }
-
-#define rwlock_init(pl) init_rwsem(pl)
-
-#define read_lock(l) down_read(l)
-#define read_unlock(l) up_read(l)
-#define write_lock(l) down_write(l)
-#define write_unlock(l) up_write(l)
-
-static inline void write_lock_irqsave(rwlock_t *l, unsigned long f)
-{
- write_lock(l);
-}
-
-static inline void write_unlock_irqrestore(rwlock_t *l, unsigned long f)
-{
- write_unlock(l);
-}
-
-static inline void read_lock_irqsave(rwlock_t *l, unsigned long f)
-{
- read_lock(l);
-}
-
-static inline void read_unlock_irqrestore(rwlock_t *l, unsigned long f)
-{
- read_unlock(l);
-}
-
-/*
- * Atomic for single-threaded user-space
- */
-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)
-#define atomic_add_unless(v, a, u) \
- ((v)->counter != u ? (v)->counter += a : 0)
-#define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0)
-#define atomic_cmpxchg(v, ov, nv) \
- ((v)->counter == ov ? ((v)->counter = nv, ov) : (v)->counter)
-
-typedef struct { volatile long counter; } atomic_long_t;
-
-#define ATOMIC_LONG_INIT(i) { (i) }
-
-#define atomic_long_read(a) ((a)->counter)
-#define atomic_long_set(a, b) do {(a)->counter = b; } while (0)
-#define atomic_long_dec_and_test(a) ((--((a)->counter)) == 0)
-#define atomic_long_dec_and_lock(a, b) ((--((a)->counter)) == 0)
-#define atomic_long_inc(a) (((a)->counter)++)
-#define atomic_long_dec(a) do { (a)->counter--; } while (0)
-#define atomic_long_add(b, a) do {(a)->counter += b; } while (0)
-#define atomic_long_add_return(n, a) ((a)->counter += n)
-#define atomic_long_inc_return(a) atomic_long_add_return(1, a)
-#define atomic_long_sub(b, a) do {(a)->counter -= b; } while (0)
-#define atomic_long_sub_return(n, a) ((a)->counter -= n)
-#define atomic_long_dec_return(a) atomic_long_sub_return(1, a)
-#define atomic_long_add_unless(v, a, u) \
- ((v)->counter != u ? (v)->counter += a : 0)
-#define atomic_long_inc_not_zero(v) atomic_long_add_unless((v), 1, 0)
-#define atomic_long_cmpxchg(v, ov, nv) \
- ((v)->counter == ov ? ((v)->counter = nv, ov) : (v)->counter)
-
-#ifdef HAVE_LIBPTHREAD
-#include <pthread.h>
-
-/*
- * Multi-threaded user space atomic APIs
- */
-
-typedef struct { volatile int counter; } mt_atomic_t;
-
-int mt_atomic_read(mt_atomic_t *a);
-void mt_atomic_set(mt_atomic_t *a, int b);
-int mt_atomic_dec_and_test(mt_atomic_t *a);
-void mt_atomic_inc(mt_atomic_t *a);
-void mt_atomic_dec(mt_atomic_t *a);
-void mt_atomic_add(int b, mt_atomic_t *a);
-void mt_atomic_sub(int b, mt_atomic_t *a);
-
-#endif /* HAVE_LIBPTHREAD */
-
-/**************************************************************************
- *
- * Mutex interface.
- *
- **************************************************************************/
-#define mutex semaphore
-
-#define DEFINE_MUTEX(m) DEFINE_SEMAPHORE(m)
-
-static inline void mutex_init(struct mutex *mutex)
-{
- sema_init(mutex, 1);
-}
-
-static inline void mutex_lock(struct mutex *mutex)
-{
- down(mutex);
-}
-
-static inline void mutex_unlock(struct mutex *mutex)
-{
- up(mutex);
-}
-
-static inline int mutex_lock_interruptible(struct mutex *mutex)
-{
- return down_interruptible(mutex);
-}
-
-/**
- * Try-lock this mutex.
- *
- * Note, return values are negation of what is expected from down_trylock() or
- * pthread_mutex_trylock().
- *
- * \retval 1 try-lock succeeded (lock acquired).
- * \retval 0 indicates lock contention.
- */
-static inline int mutex_trylock(struct mutex *mutex)
-{
- return !down_trylock(mutex);
-}
-
-static inline void mutex_destroy(struct mutex *lock)
-{
-}
-
-/*
- * This is for use in assertions _only_, i.e., this function should always
- * return 1.
- *
- * \retval 1 mutex is locked.
- *
- * \retval 0 mutex is not locked. This should never happen.
- */
-static inline int mutex_is_locked(struct mutex *lock)
-{
- return 1;
-}
-
-
-/**************************************************************************
- *
- * Lockdep "implementation". Also see lustre_compat25.h
- *
- **************************************************************************/
-
-struct lock_class_key {
- int foo;
-};
-
-static inline void lockdep_set_class(void *lock, struct lock_class_key *key)
-{
-}
-
-static inline void lockdep_off(void)
-{
-}
-
-static inline void lockdep_on(void)
-{
-}
-
-#define mutex_lock_nested(mutex, subclass) mutex_lock(mutex)
-#define spin_lock_nested(lock, subclass) spin_lock(lock)
-#define down_read_nested(lock, subclass) down_read(lock)
-#define down_write_nested(lock, subclass) down_write(lock)
-
-
-/* !__KERNEL__ */
-#endif
-
-/* __LIBCFS_USER_LOCK_H__ */
-#endif
-/*
- * Local variables:
- * c-indentation-style: "K&R"
- * c-basic-offset: 8
- * tab-width: 8
- * fill-column: 80
- * scroll-step: 1
- * End:
- */
git://git.whamcloud.com / fs / lustre-release.git / commitdiff