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mirror_zfs/module/splat/splat-internal.h
Brian Behlendorf 55abb0929e Split <sys/debug.h> header 
To avoid symbol conflicts with dependent packages the debug
header must be split in to several parts.  The <sys/debug.h>
header now only contains the Solaris macro's such as ASSERT
and VERIFY.  The spl-debug.h header contain the spl specific
debugging infrastructure and should be included by any package
which needs to use the spl logging.  Finally the spl-trace.h
header contains internal data structures only used for the log
facility and should not be included by anythign by spl-debug.c.

This way dependent packages can include the standard Solaris
headers without picking up any SPL debug macros.  However, if
the dependant package want to integrate with the SPL debugging
subsystem they can then explicitly include spl-debug.h.

Along with this change I have dropped the CHECK_STACK macros
because the upstream Linux kernel now has much better stack
depth checking built in and we don't need this complexity.

Additionally SBUG has been replaced with PANIC and provided as
part of the Solaris macro set.  While the Solaris version is
really panic() that conflicts with the Linux kernel so we'll
just have to make due to PANIC.  It should rarely be called
directly, the prefered usage would be an ASSERT or VERIFY.

There's lots of change here but this cleanup was overdue.
2010-07-20 13:29:35 -07:00

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/*****************************************************************************\
* 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.
* For details, see <http://github.com/behlendorf/spl/>.
*
* 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 _SPLAT_INTERNAL_H
#define _SPLAT_INTERNAL_H
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/sched.h>
#include <linux/elf.h>
#include <linux/limits.h>
#include <linux/version.h>
#include <linux/vmalloc.h>
#include <linux/module.h>
#include <linux/device.h>
#include <linux/list.h>
#include <linux/swap.h>
#include <linux/delay.h>
#include <asm/ioctls.h>
#include <asm/uaccess.h>
#include <stdarg.h>
#include <sys/callb.h>
#include <sys/condvar.h>
#include <sys/cred.h>
#include <sys/sysmacros.h>
#include <sys/kmem.h>
#include <sys/kstat.h>
#include <sys/mutex.h>
#include <sys/random.h>
#include <sys/rwlock.h>
#include <sys/taskq.h>
#include <sys/thread.h>
#include <sys/time.h>
#include <sys/timer.h>
#include <sys/types.h>
#include <sys/kobj.h>
#include <sys/atomic.h>
#include <sys/list.h>
#include <sys/sunddi.h>
#include <linux/cdev.h>
#include "spl-device.h"
#include "spl-debug.h"
#include "splat-ctl.h"
#define SPLAT_SUBSYSTEM_INIT(type) \
({ splat_subsystem_t *_sub_; \
\
_sub_ = (splat_subsystem_t *)splat_##type##_init(); \
if (_sub_ == NULL) { \
printk(KERN_ERR "splat: Error initializing: " #type "\n"); \
} else { \
spin_lock(&splat_module_lock); \
list_add_tail(&(_sub_->subsystem_list), \
&splat_module_list); \
spin_unlock(&splat_module_lock); \
} \
})
#define SPLAT_SUBSYSTEM_FINI(type) \
({ splat_subsystem_t *_sub_, *_tmp_; \
int _id_, _flag_ = 0; \
\
_id_ = splat_##type##_id(); \
spin_lock(&splat_module_lock); \
list_for_each_entry_safe(_sub_, _tmp_, &splat_module_list, \
subsystem_list) { \
if (_sub_->desc.id == _id_) { \
list_del_init(&(_sub_->subsystem_list)); \
spin_unlock(&splat_module_lock); \
splat_##type##_fini(_sub_); \
spin_lock(&splat_module_lock); \
_flag_ = 1; \
} \
} \
spin_unlock(&splat_module_lock); \
\
if (!_flag_) \
printk(KERN_ERR "splat: Error finalizing: " #type "\n"); \
})
#define SPLAT_TEST_INIT(sub, n, d, tid, func) \
({ splat_test_t *_test_; \
\
_test_ = (splat_test_t *)kmalloc(sizeof(*_test_), GFP_KERNEL); \
if (_test_ == NULL) { \
printk(KERN_ERR "splat: Error initializing: " n "/" #tid" \n");\
} else { \
memset(_test_, 0, sizeof(*_test_)); \
strncpy(_test_->desc.name, n, SPLAT_NAME_SIZE-1); \
strncpy(_test_->desc.desc, d, SPLAT_DESC_SIZE-1); \
_test_->desc.id = tid; \
_test_->test = func; \
INIT_LIST_HEAD(&(_test_->test_list)); \
spin_lock(&((sub)->test_lock)); \
list_add_tail(&(_test_->test_list),&((sub)->test_list));\
spin_unlock(&((sub)->test_lock)); \
} \
})
#define SPLAT_TEST_FINI(sub, tid) \
({ splat_test_t *_test_, *_tmp_; \
int _flag_ = 0; \
\
spin_lock(&((sub)->test_lock)); \
list_for_each_entry_safe(_test_, _tmp_, \
&((sub)->test_list), test_list) { \
if (_test_->desc.id == tid) { \
list_del_init(&(_test_->test_list)); \
_flag_ = 1; \
} \
} \
spin_unlock(&((sub)->test_lock)); \
\
if (!_flag_) \
printk(KERN_ERR "splat: Error finalizing: " #tid "\n"); \
})
typedef int (*splat_test_func_t)(struct file *, void *);
typedef struct splat_test {
struct list_head test_list;
splat_user_t desc;
splat_test_func_t test;
} splat_test_t;
typedef struct splat_subsystem {
struct list_head subsystem_list;/* List had to chain entries */
splat_user_t desc;
spinlock_t test_lock;
struct list_head test_list;
} splat_subsystem_t;
#define SPLAT_INFO_BUFFER_SIZE 65536
#define SPLAT_INFO_BUFFER_REDZONE 256
typedef struct splat_info {
spinlock_t info_lock;
int info_size;
char *info_buffer;
char *info_head; /* Internal kernel use only */
} splat_info_t;
#define sym2str(sym) (char *)(#sym)
#define splat_print(file, format, args...) \
({ splat_info_t *_info_ = (splat_info_t *)file->private_data; \
int _rc_; \
\
ASSERT(_info_); \
ASSERT(_info_->info_buffer); \
\
spin_lock(&_info_->info_lock); \
\
/* Don't allow the kernel to start a write in the red zone */ \
if ((int)(_info_->info_head - _info_->info_buffer) > \
(SPLAT_INFO_BUFFER_SIZE - SPLAT_INFO_BUFFER_REDZONE)) { \
_rc_ = -EOVERFLOW; \
} else { \
_rc_ = sprintf(_info_->info_head, format, args); \
if (_rc_ >= 0) \
_info_->info_head += _rc_; \
} \
\
spin_unlock(&_info_->info_lock); \
_rc_; \
})
#define splat_vprint(file, test, format, args...) \
splat_print(file, "%*s: " format, SPLAT_NAME_SIZE, test, args)
#define splat_locked_test(lock, test) \
({ \
int _rc_; \
spin_lock(lock); \
_rc_ = (test) ? 1 : 0; \
spin_unlock(lock); \
_rc_; \
})
splat_subsystem_t *splat_condvar_init(void);
splat_subsystem_t *splat_kmem_init(void);
splat_subsystem_t *splat_mutex_init(void);
splat_subsystem_t *splat_krng_init(void);
splat_subsystem_t *splat_rwlock_init(void);
splat_subsystem_t *splat_taskq_init(void);
splat_subsystem_t *splat_thread_init(void);
splat_subsystem_t *splat_time_init(void);
splat_subsystem_t *splat_vnode_init(void);
splat_subsystem_t *splat_kobj_init(void);
splat_subsystem_t *splat_atomic_init(void);
splat_subsystem_t *splat_list_init(void);
splat_subsystem_t *splat_generic_init(void);
splat_subsystem_t *splat_cred_init(void);
void splat_condvar_fini(splat_subsystem_t *);
void splat_kmem_fini(splat_subsystem_t *);
void splat_mutex_fini(splat_subsystem_t *);
void splat_krng_fini(splat_subsystem_t *);
void splat_rwlock_fini(splat_subsystem_t *);
void splat_taskq_fini(splat_subsystem_t *);
void splat_thread_fini(splat_subsystem_t *);
void splat_time_fini(splat_subsystem_t *);
void splat_vnode_fini(splat_subsystem_t *);
void splat_kobj_fini(splat_subsystem_t *);
void splat_atomic_fini(splat_subsystem_t *);
void splat_list_fini(splat_subsystem_t *);
void splat_generic_fini(splat_subsystem_t *);
void splat_cred_fini(splat_subsystem_t *);
int splat_condvar_id(void);
int splat_kmem_id(void);
int splat_mutex_id(void);
int splat_krng_id(void);
int splat_rwlock_id(void);
int splat_taskq_id(void);
int splat_thread_id(void);
int splat_time_id(void);
int splat_vnode_id(void);
int splat_kobj_id(void);
int splat_atomic_id(void);
int splat_list_id(void);
int splat_generic_id(void);
int splat_cred_id(void);
#endif /* _SPLAT_INTERNAL_H */
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