2 * Copyright (c) 2010 Isilon Systems, Inc.
3 * Copyright (c) 2010 iX Systems, Inc.
4 * Copyright (c) 2010 Panasas, Inc.
5 * Copyright (c) 2013-2018 Mellanox Technologies, Ltd.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice unmodified, this list of conditions, and the following
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 #ifndef _LINUX_SCHED_H_
32 #define _LINUX_SCHED_H_
34 #include <sys/param.h>
35 #include <sys/systm.h>
37 #include <sys/sched.h>
38 #include <sys/sleepqueue.h>
41 #include <linux/bitmap.h>
42 #include <linux/compat.h>
43 #include <linux/completion.h>
44 #include <linux/mm_types.h>
45 #include <linux/pid.h>
46 #include <linux/slab.h>
47 #include <linux/string.h>
48 #include <linux/time.h>
50 #include <asm/atomic.h>
52 #define MAX_SCHEDULE_TIMEOUT INT_MAX
54 #define TASK_RUNNING 0x0000
55 #define TASK_INTERRUPTIBLE 0x0001
56 #define TASK_UNINTERRUPTIBLE 0x0002
57 #define TASK_NORMAL (TASK_INTERRUPTIBLE | TASK_UNINTERRUPTIBLE)
58 #define TASK_WAKING 0x0100
59 #define TASK_PARKED 0x0200
61 #define TASK_COMM_LEN (MAXCOMLEN + 1)
65 struct thread *task_thread;
67 linux_task_fn_t *task_fn;
72 atomic_t kthread_flags;
73 pid_t pid; /* BSD thread ID */
76 unsigned bsd_ioctl_len;
77 struct completion parked;
78 struct completion exited;
79 TAILQ_ENTRY(task_struct) rcu_entry;
81 int bsd_interrupt_value;
82 struct work_struct *work; /* current work struct, if set */
83 struct task_struct *group_leader;
87 struct thread *__td = curthread; \
88 linux_set_current(__td); \
89 ((struct task_struct *)__td->td_lkpi_task); \
92 #define task_pid_group_leader(task) (task)->task_thread->td_proc->p_pid
93 #define task_pid(task) ((task)->pid)
94 #define task_pid_nr(task) ((task)->pid)
95 #define task_pid_vnr(task) ((task)->pid)
96 #define get_pid(x) (x)
97 #define put_pid(x) do { } while (0)
98 #define current_euid() (curthread->td_ucred->cr_uid)
99 #define task_euid(task) ((task)->task_thread->td_ucred->cr_uid)
101 #define get_task_state(task) atomic_read(&(task)->state)
102 #define set_task_state(task, x) atomic_set(&(task)->state, (x))
103 #define __set_task_state(task, x) ((task)->state.counter = (x))
104 #define set_current_state(x) set_task_state(current, x)
105 #define __set_current_state(x) __set_task_state(current, x)
108 get_task_struct(struct task_struct *task)
110 atomic_inc(&task->usage);
114 put_task_struct(struct task_struct *task)
116 if (atomic_dec_and_test(&task->usage))
117 linux_free_current(task);
120 #define cond_resched() do { if (!cold) sched_relinquish(curthread); } while (0)
122 #define yield() kern_yield(PRI_UNCHANGED)
123 #define sched_yield() sched_relinquish(curthread)
125 #define need_resched() (curthread->td_flags & TDF_NEEDRESCHED)
127 bool linux_signal_pending(struct task_struct *task);
128 bool linux_fatal_signal_pending(struct task_struct *task);
129 bool linux_signal_pending_state(long state, struct task_struct *task);
130 void linux_send_sig(int signo, struct task_struct *task);
132 #define signal_pending(task) linux_signal_pending(task)
133 #define fatal_signal_pending(task) linux_fatal_signal_pending(task)
134 #define signal_pending_state(state, task) \
135 linux_signal_pending_state(state, task)
136 #define send_sig(signo, task, priv) do { \
137 CTASSERT((priv) == 0); \
138 linux_send_sig(signo, task); \
141 int linux_schedule_timeout(int timeout);
144 linux_schedule_save_interrupt_value(struct task_struct *task, int value)
146 task->bsd_interrupt_value = value;
149 bool linux_task_exiting(struct task_struct *task);
151 #define current_exiting() \
152 linux_task_exiting(current)
155 linux_schedule_get_interrupt_value(struct task_struct *task)
157 int value = task->bsd_interrupt_value;
158 task->bsd_interrupt_value = 0;
163 (void)linux_schedule_timeout(MAX_SCHEDULE_TIMEOUT)
164 #define schedule_timeout(timeout) \
165 linux_schedule_timeout(timeout)
166 #define schedule_timeout_killable(timeout) \
167 schedule_timeout_interruptible(timeout)
168 #define schedule_timeout_interruptible(timeout) ({ \
169 set_current_state(TASK_INTERRUPTIBLE); \
170 schedule_timeout(timeout); \
172 #define schedule_timeout_uninterruptible(timeout) ({ \
173 set_current_state(TASK_UNINTERRUPTIBLE); \
174 schedule_timeout(timeout); \
177 #define io_schedule() schedule()
178 #define io_schedule_timeout(timeout) schedule_timeout(timeout)
180 static inline uint64_t
186 return ((uint64_t)ts.tv_sec * NSEC_PER_SEC + ts.tv_nsec);
189 static inline const char *
190 get_task_comm(char *buf, struct task_struct *task)
193 buf[0] = 0; /* buffer is too small */
197 #endif /* _LINUX_SCHED_H_ */