33e5ee289e
To access these fields the code always has to go to group leader so going to signal struct is no loss and is actually a fundamental simplification. This saves a little bit of memory by only allocating the pid pointer array once instead of once for every thread, and even better this removes a few potential races caused by the fact that group_leader can be changed by de_thread, while signal_struct can not. Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by: Sorayukii <sorayukii69@gmail.com>
179 lines
4.2 KiB
C
179 lines
4.2 KiB
C
#ifndef _LINUX__INIT_TASK_H
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#define _LINUX__INIT_TASK_H
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#include <linux/rcupdate.h>
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#include <linux/irqflags.h>
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#include <linux/utsname.h>
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#include <linux/lockdep.h>
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#include <linux/ftrace.h>
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#include <linux/ipc.h>
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#include <linux/pid_namespace.h>
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#include <linux/user_namespace.h>
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#include <linux/securebits.h>
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#include <linux/seqlock.h>
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#include <linux/rbtree.h>
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#include <net/net_namespace.h>
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#include <linux/sched/rt.h>
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#include <asm/thread_info.h>
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#ifdef CONFIG_SMP
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# define INIT_PUSHABLE_TASKS(tsk) \
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.pushable_tasks = PLIST_NODE_INIT(tsk.pushable_tasks, MAX_PRIO),
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#else
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# define INIT_PUSHABLE_TASKS(tsk)
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#endif
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extern struct files_struct init_files;
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extern struct fs_struct init_fs;
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extern struct nsproxy init_nsproxy;
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extern struct group_info init_groups;
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extern struct cred init_cred;
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#ifdef CONFIG_CPUSETS
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#define INIT_CPUSET_SEQ(tsk) \
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.mems_allowed_seq = SEQCNT_ZERO(tsk.mems_allowed_seq),
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#else
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#define INIT_CPUSET_SEQ(tsk)
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#endif
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#ifndef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
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#define INIT_PREV_CPUTIME(x) .prev_cputime = { \
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.lock = __RAW_SPIN_LOCK_UNLOCKED(x.prev_cputime.lock), \
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},
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#else
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#define INIT_PREV_CPUTIME(x)
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#endif
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#ifdef CONFIG_POSIX_TIMERS
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#define INIT_CPU_TIMERS(s) \
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.cpu_timers = { \
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LIST_HEAD_INIT(s.cpu_timers[0]), \
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LIST_HEAD_INIT(s.cpu_timers[1]), \
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LIST_HEAD_INIT(s.cpu_timers[2]), \
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},
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#else
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#define INIT_CPU_TIMERS(s)
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#endif
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#define INIT_STRUCT_PID { \
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.count = ATOMIC_INIT(1), \
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.tasks = { \
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{ .first = NULL }, \
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{ .first = NULL }, \
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{ .first = NULL }, \
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}, \
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.level = 0, \
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.numbers = { { \
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.nr = 0, \
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.ns = &init_pid_ns, \
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.pid_chain = { .next = NULL, .pprev = NULL }, \
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}, } \
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}
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#ifdef CONFIG_AUDITSYSCALL
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#define INIT_IDS \
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.loginuid = INVALID_UID, \
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.sessionid = (unsigned int)-1,
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#else
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#define INIT_IDS
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#endif
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#ifdef CONFIG_PREEMPT_RCU
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#define INIT_TASK_RCU_TREE_PREEMPT() \
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.rcu_blocked_node = NULL,
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#else
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#define INIT_TASK_RCU_TREE_PREEMPT(tsk)
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#endif
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#ifdef CONFIG_PREEMPT_RCU
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#define INIT_TASK_RCU_PREEMPT(tsk) \
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.rcu_read_lock_nesting = 0, \
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.rcu_read_unlock_special.s = 0, \
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.rcu_node_entry = LIST_HEAD_INIT(tsk.rcu_node_entry), \
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INIT_TASK_RCU_TREE_PREEMPT()
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#else
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#define INIT_TASK_RCU_PREEMPT(tsk)
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#endif
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#ifdef CONFIG_TASKS_RCU
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#define INIT_TASK_RCU_TASKS(tsk) \
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.rcu_tasks_holdout = false, \
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.rcu_tasks_holdout_list = \
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LIST_HEAD_INIT(tsk.rcu_tasks_holdout_list), \
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.rcu_tasks_idle_cpu = -1,
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#else
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#define INIT_TASK_RCU_TASKS(tsk)
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#endif
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extern struct task_group root_task_group;
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#ifdef CONFIG_CGROUP_SCHED
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# define INIT_CGROUP_SCHED(tsk) \
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.sched_task_group = &root_task_group,
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#else
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# define INIT_CGROUP_SCHED(tsk)
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#endif
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#ifdef CONFIG_PERF_EVENTS
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# define INIT_PERF_EVENTS(tsk) \
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.perf_event_mutex = \
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__MUTEX_INITIALIZER(tsk.perf_event_mutex), \
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.perf_event_list = LIST_HEAD_INIT(tsk.perf_event_list),
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#else
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# define INIT_PERF_EVENTS(tsk)
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#endif
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#ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN
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# define INIT_VTIME(tsk) \
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.vtime_seqcount = SEQCNT_ZERO(tsk.vtime_seqcount), \
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.vtime_snap = 0, \
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.vtime_snap_whence = VTIME_SYS,
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#else
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# define INIT_VTIME(tsk)
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#endif
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#define INIT_TASK_COMM "swapper"
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#ifdef CONFIG_RT_MUTEXES
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# define INIT_RT_MUTEXES(tsk) \
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.pi_waiters = RB_ROOT, \
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.pi_waiters_leftmost = NULL,
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#else
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# define INIT_RT_MUTEXES(tsk)
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#endif
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#ifdef CONFIG_NUMA_BALANCING
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# define INIT_NUMA_BALANCING(tsk) \
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.numa_preferred_nid = -1, \
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.numa_group = NULL, \
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.numa_faults = NULL,
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#else
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# define INIT_NUMA_BALANCING(tsk)
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#endif
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#ifdef CONFIG_KASAN
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# define INIT_KASAN(tsk) \
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.kasan_depth = 1,
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#else
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# define INIT_KASAN(tsk)
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#endif
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#ifdef CONFIG_THREAD_INFO_IN_TASK
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# define INIT_TASK_TI(tsk) \
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.thread_info = INIT_THREAD_INFO(tsk), \
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.stack_refcount = ATOMIC_INIT(1),
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#else
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# define INIT_TASK_TI(tsk)
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#endif
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/* Attach to the init_task data structure for proper alignment */
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#ifdef CONFIG_ARCH_TASK_STRUCT_ON_STACK
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#define __init_task_data __attribute__((__section__(".data..init_task")))
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#else
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#define __init_task_data /**/
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#endif
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/* Attach to the thread_info data structure for proper alignment */
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#define __init_thread_info __attribute__((__section__(".data..init_thread_info")))
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#endif
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