-/*****************************************************************************\
+/*
* 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_TASKQ_H
-#define _SPL_TASKQ_H
+#define _SPL_TASKQ_H
#include <linux/module.h>
#include <linux/gfp.h>
#include <linux/kthread.h>
#include <sys/types.h>
#include <sys/thread.h>
+#include <sys/rwlock.h>
-#define TASKQ_NAMELEN 31
+#define TASKQ_NAMELEN 31
-#define TASKQ_PREPOPULATE 0x00000001
-#define TASKQ_CPR_SAFE 0x00000002
-#define TASKQ_DYNAMIC 0x00000004
-#define TASKQ_THREADS_CPU_PCT 0x00000008
-#define TASKQ_DC_BATCH 0x00000010
+#define TASKQ_PREPOPULATE 0x00000001
+#define TASKQ_CPR_SAFE 0x00000002
+#define TASKQ_DYNAMIC 0x00000004
+#define TASKQ_THREADS_CPU_PCT 0x00000008
+#define TASKQ_DC_BATCH 0x00000010
+#define TASKQ_ACTIVE 0x80000000
/*
* Flags for taskq_dispatch. TQ_SLEEP/TQ_NOSLEEP should be same as
* KM_SLEEP/KM_NOSLEEP. TQ_NOQUEUE/TQ_NOALLOC are set particularly
* large so as not to conflict with already used GFP_* defines.
*/
-#define TQ_SLEEP 0x00000000
-#define TQ_NOSLEEP 0x00000001
-#define TQ_PUSHPAGE 0x00000002
-#define TQ_NOQUEUE 0x01000000
-#define TQ_NOALLOC 0x02000000
-#define TQ_NEW 0x04000000
-#define TQ_FRONT 0x08000000
-#define TQ_ACTIVE 0x80000000
+#define TQ_SLEEP 0x00000000
+#define TQ_NOSLEEP 0x00000001
+#define TQ_PUSHPAGE 0x00000002
+#define TQ_NOQUEUE 0x01000000
+#define TQ_NOALLOC 0x02000000
+#define TQ_NEW 0x04000000
+#define TQ_FRONT 0x08000000
+
+/*
+ * Reserved taskqid values.
+ */
+#define TASKQID_INVALID ((taskqid_t)0)
+#define TASKQID_INITIAL ((taskqid_t)1)
+
+/*
+ * spin_lock(lock) and spin_lock_nested(lock,0) are equivalent,
+ * so TQ_LOCK_DYNAMIC must not evaluate to 0
+ */
+typedef enum tq_lock_role {
+ TQ_LOCK_GENERAL = 0,
+ TQ_LOCK_DYNAMIC = 1,
+} tq_lock_role_t;
typedef unsigned long taskqid_t;
typedef void (task_func_t)(void *);
typedef struct taskq {
- spinlock_t tq_lock; /* protects taskq_t */
- unsigned long tq_lock_flags; /* interrupt state */
- const char *tq_name; /* taskq name */
- struct list_head tq_thread_list;/* list of all threads */
- struct list_head tq_active_list;/* list of active threads */
- int tq_nactive; /* # of active threads */
- int tq_nthreads; /* # of total threads */
- int tq_pri; /* priority */
- int tq_minalloc; /* min task_t pool size */
- int tq_maxalloc; /* max task_t pool size */
- int tq_nalloc; /* cur task_t pool size */
- uint_t tq_flags; /* flags */
- taskqid_t tq_next_id; /* next pend/work id */
- taskqid_t tq_lowest_id; /* lowest pend/work id */
- struct list_head tq_free_list; /* free task_t's */
- struct list_head tq_pend_list; /* pending task_t's */
- struct list_head tq_prio_list; /* priority pending task_t's */
- struct list_head tq_delay_list; /* delayed task_t's */
- wait_queue_head_t tq_work_waitq; /* new work waitq */
- wait_queue_head_t tq_wait_waitq; /* wait waitq */
+ spinlock_t tq_lock; /* protects taskq_t */
+ char *tq_name; /* taskq name */
+ int tq_instance; /* instance of tq_name */
+ struct list_head tq_thread_list; /* list of all threads */
+ struct list_head tq_active_list; /* list of active threads */
+ int tq_nactive; /* # of active threads */
+ int tq_nthreads; /* # of existing threads */
+ int tq_nspawn; /* # of threads being spawned */
+ int tq_maxthreads; /* # of threads maximum */
+ int tq_pri; /* priority */
+ int tq_minalloc; /* min taskq_ent_t pool size */
+ int tq_maxalloc; /* max taskq_ent_t pool size */
+ int tq_nalloc; /* cur taskq_ent_t pool size */
+ uint_t tq_flags; /* flags */
+ taskqid_t tq_next_id; /* next pend/work id */
+ taskqid_t tq_lowest_id; /* lowest pend/work id */
+ struct list_head tq_free_list; /* free taskq_ent_t's */
+ struct list_head tq_pend_list; /* pending taskq_ent_t's */
+ struct list_head tq_prio_list; /* priority pending taskq_ent_t's */
+ struct list_head tq_delay_list; /* delayed taskq_ent_t's */
+ struct list_head tq_taskqs; /* all taskq_t's */
+ wait_queue_head_t tq_work_waitq; /* new work waitq */
+ wait_queue_head_t tq_wait_waitq; /* wait waitq */
+ tq_lock_role_t tq_lock_class; /* class when taking tq_lock */
} taskq_t;
typedef struct taskq_ent {
void *tqent_arg;
taskq_t *tqent_taskq;
uintptr_t tqent_flags;
+ unsigned long tqent_birth;
} taskq_ent_t;
-#define TQENT_FLAG_PREALLOC 0x1
-#define TQENT_FLAG_CANCEL 0x2
+#define TQENT_FLAG_PREALLOC 0x1
+#define TQENT_FLAG_CANCEL 0x2
typedef struct taskq_thread {
struct list_head tqt_thread_list;
/* Global system-wide dynamic task queue available for all consumers */
extern taskq_t *system_taskq;
+/* List of all taskqs */
+extern struct list_head tq_list;
+extern struct rw_semaphore tq_list_sem;
+
extern taskqid_t taskq_dispatch(taskq_t *, task_func_t, void *, uint_t);
extern taskqid_t taskq_dispatch_delay(taskq_t *, task_func_t, void *,
uint_t, clock_t);
extern taskq_t *taskq_create(const char *, int, pri_t, int, int, uint_t);
extern void taskq_destroy(taskq_t *);
extern void taskq_wait_id(taskq_t *, taskqid_t);
-extern void taskq_wait_all(taskq_t *, taskqid_t);
+extern void taskq_wait_outstanding(taskq_t *, taskqid_t);
extern void taskq_wait(taskq_t *);
extern int taskq_cancel_id(taskq_t *, taskqid_t);
-extern int taskq_member(taskq_t *, void *);
+extern int taskq_member(taskq_t *, kthread_t *);
-#define taskq_create_proc(name, nthreads, pri, min, max, proc, flags) \
+#define taskq_create_proc(name, nthreads, pri, min, max, proc, flags) \
taskq_create(name, nthreads, pri, min, max, flags)
-#define taskq_create_sysdc(name, nthreads, min, max, proc, dc, flags) \
+#define taskq_create_sysdc(name, nthreads, min, max, proc, dc, flags) \
taskq_create(name, nthreads, maxclsyspri, min, max, flags)
int spl_taskq_init(void);
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