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733 lines
20 KiB
733 lines
20 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef _LINUX_SCHED_SIGNAL_H |
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#define _LINUX_SCHED_SIGNAL_H |
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|
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#include <linux/rculist.h> |
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#include <linux/signal.h> |
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#include <linux/sched.h> |
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#include <linux/sched/jobctl.h> |
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#include <linux/sched/task.h> |
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#include <linux/cred.h> |
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#include <linux/refcount.h> |
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#include <linux/posix-timers.h> |
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#include <linux/mm_types.h> |
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#include <asm/ptrace.h> |
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|
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/* |
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* Types defining task->signal and task->sighand and APIs using them: |
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*/ |
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struct sighand_struct { |
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spinlock_t siglock; |
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refcount_t count; |
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wait_queue_head_t signalfd_wqh; |
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struct k_sigaction action[_NSIG]; |
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}; |
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|
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/* |
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* Per-process accounting stats: |
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*/ |
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struct pacct_struct { |
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int ac_flag; |
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long ac_exitcode; |
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unsigned long ac_mem; |
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u64 ac_utime, ac_stime; |
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unsigned long ac_minflt, ac_majflt; |
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}; |
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struct cpu_itimer { |
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u64 expires; |
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u64 incr; |
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}; |
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/* |
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* This is the atomic variant of task_cputime, which can be used for |
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* storing and updating task_cputime statistics without locking. |
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*/ |
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struct task_cputime_atomic { |
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atomic64_t utime; |
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atomic64_t stime; |
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atomic64_t sum_exec_runtime; |
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}; |
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#define INIT_CPUTIME_ATOMIC \ |
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(struct task_cputime_atomic) { \ |
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.utime = ATOMIC64_INIT(0), \ |
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.stime = ATOMIC64_INIT(0), \ |
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.sum_exec_runtime = ATOMIC64_INIT(0), \ |
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} |
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/** |
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* struct thread_group_cputimer - thread group interval timer counts |
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* @cputime_atomic: atomic thread group interval timers. |
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* |
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* This structure contains the version of task_cputime, above, that is |
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* used for thread group CPU timer calculations. |
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*/ |
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struct thread_group_cputimer { |
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struct task_cputime_atomic cputime_atomic; |
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}; |
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struct multiprocess_signals { |
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sigset_t signal; |
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struct hlist_node node; |
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}; |
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/* |
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* NOTE! "signal_struct" does not have its own |
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* locking, because a shared signal_struct always |
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* implies a shared sighand_struct, so locking |
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* sighand_struct is always a proper superset of |
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* the locking of signal_struct. |
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*/ |
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struct signal_struct { |
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refcount_t sigcnt; |
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atomic_t live; |
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int nr_threads; |
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struct list_head thread_head; |
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wait_queue_head_t wait_chldexit; /* for wait4() */ |
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|
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/* current thread group signal load-balancing target: */ |
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struct task_struct *curr_target; |
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|
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/* shared signal handling: */ |
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struct sigpending shared_pending; |
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|
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/* For collecting multiprocess signals during fork */ |
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struct hlist_head multiprocess; |
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|
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/* thread group exit support */ |
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int group_exit_code; |
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/* overloaded: |
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* - notify group_exit_task when ->count is equal to notify_count |
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* - everyone except group_exit_task is stopped during signal delivery |
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* of fatal signals, group_exit_task processes the signal. |
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*/ |
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int notify_count; |
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struct task_struct *group_exit_task; |
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|
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/* thread group stop support, overloads group_exit_code too */ |
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int group_stop_count; |
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unsigned int flags; /* see SIGNAL_* flags below */ |
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|
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/* |
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* PR_SET_CHILD_SUBREAPER marks a process, like a service |
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* manager, to re-parent orphan (double-forking) child processes |
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* to this process instead of 'init'. The service manager is |
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* able to receive SIGCHLD signals and is able to investigate |
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* the process until it calls wait(). All children of this |
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* process will inherit a flag if they should look for a |
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* child_subreaper process at exit. |
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*/ |
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unsigned int is_child_subreaper:1; |
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unsigned int has_child_subreaper:1; |
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#ifdef CONFIG_POSIX_TIMERS |
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|
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/* POSIX.1b Interval Timers */ |
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int posix_timer_id; |
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struct list_head posix_timers; |
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|
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/* ITIMER_REAL timer for the process */ |
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struct hrtimer real_timer; |
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ktime_t it_real_incr; |
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|
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/* |
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* ITIMER_PROF and ITIMER_VIRTUAL timers for the process, we use |
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* CPUCLOCK_PROF and CPUCLOCK_VIRT for indexing array as these |
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* values are defined to 0 and 1 respectively |
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*/ |
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struct cpu_itimer it[2]; |
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|
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/* |
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* Thread group totals for process CPU timers. |
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* See thread_group_cputimer(), et al, for details. |
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*/ |
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struct thread_group_cputimer cputimer; |
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#endif |
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/* Empty if CONFIG_POSIX_TIMERS=n */ |
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struct posix_cputimers posix_cputimers; |
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|
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/* PID/PID hash table linkage. */ |
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struct pid *pids[PIDTYPE_MAX]; |
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#ifdef CONFIG_NO_HZ_FULL |
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atomic_t tick_dep_mask; |
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#endif |
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struct pid *tty_old_pgrp; |
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/* boolean value for session group leader */ |
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int leader; |
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struct tty_struct *tty; /* NULL if no tty */ |
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#ifdef CONFIG_SCHED_AUTOGROUP |
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struct autogroup *autogroup; |
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#endif |
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/* |
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* Cumulative resource counters for dead threads in the group, |
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* and for reaped dead child processes forked by this group. |
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* Live threads maintain their own counters and add to these |
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* in __exit_signal, except for the group leader. |
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*/ |
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seqlock_t stats_lock; |
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u64 utime, stime, cutime, cstime; |
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u64 gtime; |
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u64 cgtime; |
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struct prev_cputime prev_cputime; |
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unsigned long nvcsw, nivcsw, cnvcsw, cnivcsw; |
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unsigned long min_flt, maj_flt, cmin_flt, cmaj_flt; |
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unsigned long inblock, oublock, cinblock, coublock; |
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unsigned long maxrss, cmaxrss; |
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struct task_io_accounting ioac; |
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|
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/* |
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* Cumulative ns of schedule CPU time fo dead threads in the |
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* group, not including a zombie group leader, (This only differs |
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* from jiffies_to_ns(utime + stime) if sched_clock uses something |
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* other than jiffies.) |
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*/ |
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unsigned long long sum_sched_runtime; |
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|
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/* |
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* We don't bother to synchronize most readers of this at all, |
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* because there is no reader checking a limit that actually needs |
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* to get both rlim_cur and rlim_max atomically, and either one |
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* alone is a single word that can safely be read normally. |
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* getrlimit/setrlimit use task_lock(current->group_leader) to |
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* protect this instead of the siglock, because they really |
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* have no need to disable irqs. |
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*/ |
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struct rlimit rlim[RLIM_NLIMITS]; |
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#ifdef CONFIG_BSD_PROCESS_ACCT |
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struct pacct_struct pacct; /* per-process accounting information */ |
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#endif |
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#ifdef CONFIG_TASKSTATS |
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struct taskstats *stats; |
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#endif |
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#ifdef CONFIG_AUDIT |
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unsigned audit_tty; |
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struct tty_audit_buf *tty_audit_buf; |
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#endif |
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/* |
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* Thread is the potential origin of an oom condition; kill first on |
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* oom |
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*/ |
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bool oom_flag_origin; |
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short oom_score_adj; /* OOM kill score adjustment */ |
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short oom_score_adj_min; /* OOM kill score adjustment min value. |
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* Only settable by CAP_SYS_RESOURCE. */ |
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struct mm_struct *oom_mm; /* recorded mm when the thread group got |
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* killed by the oom killer */ |
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struct mutex cred_guard_mutex; /* guard against foreign influences on |
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* credential calculations |
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* (notably. ptrace) |
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* Deprecated do not use in new code. |
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* Use exec_update_lock instead. |
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*/ |
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struct rw_semaphore exec_update_lock; /* Held while task_struct is |
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* being updated during exec, |
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* and may have inconsistent |
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* permissions. |
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*/ |
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} __randomize_layout; |
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|
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/* |
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* Bits in flags field of signal_struct. |
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*/ |
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#define SIGNAL_STOP_STOPPED 0x00000001 /* job control stop in effect */ |
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#define SIGNAL_STOP_CONTINUED 0x00000002 /* SIGCONT since WCONTINUED reap */ |
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#define SIGNAL_GROUP_EXIT 0x00000004 /* group exit in progress */ |
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#define SIGNAL_GROUP_COREDUMP 0x00000008 /* coredump in progress */ |
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/* |
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* Pending notifications to parent. |
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*/ |
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#define SIGNAL_CLD_STOPPED 0x00000010 |
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#define SIGNAL_CLD_CONTINUED 0x00000020 |
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#define SIGNAL_CLD_MASK (SIGNAL_CLD_STOPPED|SIGNAL_CLD_CONTINUED) |
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#define SIGNAL_UNKILLABLE 0x00000040 /* for init: ignore fatal signals */ |
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#define SIGNAL_STOP_MASK (SIGNAL_CLD_MASK | SIGNAL_STOP_STOPPED | \ |
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SIGNAL_STOP_CONTINUED) |
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static inline void signal_set_stop_flags(struct signal_struct *sig, |
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unsigned int flags) |
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{ |
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WARN_ON(sig->flags & (SIGNAL_GROUP_EXIT|SIGNAL_GROUP_COREDUMP)); |
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sig->flags = (sig->flags & ~SIGNAL_STOP_MASK) | flags; |
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} |
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|
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/* If true, all threads except ->group_exit_task have pending SIGKILL */ |
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static inline int signal_group_exit(const struct signal_struct *sig) |
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{ |
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return (sig->flags & SIGNAL_GROUP_EXIT) || |
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(sig->group_exit_task != NULL); |
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} |
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extern void flush_signals(struct task_struct *); |
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extern void ignore_signals(struct task_struct *); |
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extern void flush_signal_handlers(struct task_struct *, int force_default); |
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extern int dequeue_signal(struct task_struct *task, |
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sigset_t *mask, kernel_siginfo_t *info); |
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static inline int kernel_dequeue_signal(void) |
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{ |
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struct task_struct *task = current; |
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kernel_siginfo_t __info; |
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int ret; |
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spin_lock_irq(&task->sighand->siglock); |
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ret = dequeue_signal(task, &task->blocked, &__info); |
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spin_unlock_irq(&task->sighand->siglock); |
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return ret; |
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} |
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static inline void kernel_signal_stop(void) |
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{ |
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spin_lock_irq(¤t->sighand->siglock); |
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if (current->jobctl & JOBCTL_STOP_DEQUEUED) |
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set_special_state(TASK_STOPPED); |
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spin_unlock_irq(¤t->sighand->siglock); |
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schedule(); |
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} |
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#ifdef __ARCH_SI_TRAPNO |
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# define ___ARCH_SI_TRAPNO(_a1) , _a1 |
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#else |
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# define ___ARCH_SI_TRAPNO(_a1) |
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#endif |
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#ifdef __ia64__ |
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# define ___ARCH_SI_IA64(_a1, _a2, _a3) , _a1, _a2, _a3 |
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#else |
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# define ___ARCH_SI_IA64(_a1, _a2, _a3) |
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#endif |
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int force_sig_fault_to_task(int sig, int code, void __user *addr |
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___ARCH_SI_TRAPNO(int trapno) |
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___ARCH_SI_IA64(int imm, unsigned int flags, unsigned long isr) |
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, struct task_struct *t); |
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int force_sig_fault(int sig, int code, void __user *addr |
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___ARCH_SI_TRAPNO(int trapno) |
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___ARCH_SI_IA64(int imm, unsigned int flags, unsigned long isr)); |
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int send_sig_fault(int sig, int code, void __user *addr |
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___ARCH_SI_TRAPNO(int trapno) |
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___ARCH_SI_IA64(int imm, unsigned int flags, unsigned long isr) |
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, struct task_struct *t); |
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int force_sig_mceerr(int code, void __user *, short); |
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int send_sig_mceerr(int code, void __user *, short, struct task_struct *); |
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int force_sig_bnderr(void __user *addr, void __user *lower, void __user *upper); |
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int force_sig_pkuerr(void __user *addr, u32 pkey); |
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int force_sig_ptrace_errno_trap(int errno, void __user *addr); |
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extern int send_sig_info(int, struct kernel_siginfo *, struct task_struct *); |
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extern void force_sigsegv(int sig); |
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extern int force_sig_info(struct kernel_siginfo *); |
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extern int __kill_pgrp_info(int sig, struct kernel_siginfo *info, struct pid *pgrp); |
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extern int kill_pid_info(int sig, struct kernel_siginfo *info, struct pid *pid); |
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extern int kill_pid_usb_asyncio(int sig, int errno, sigval_t addr, struct pid *, |
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const struct cred *); |
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extern int kill_pgrp(struct pid *pid, int sig, int priv); |
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extern int kill_pid(struct pid *pid, int sig, int priv); |
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extern __must_check bool do_notify_parent(struct task_struct *, int); |
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extern void __wake_up_parent(struct task_struct *p, struct task_struct *parent); |
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extern void force_sig(int); |
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extern int send_sig(int, struct task_struct *, int); |
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extern int zap_other_threads(struct task_struct *p); |
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extern struct sigqueue *sigqueue_alloc(void); |
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extern void sigqueue_free(struct sigqueue *); |
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extern int send_sigqueue(struct sigqueue *, struct pid *, enum pid_type); |
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extern int do_sigaction(int, struct k_sigaction *, struct k_sigaction *); |
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static inline int restart_syscall(void) |
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{ |
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set_tsk_thread_flag(current, TIF_SIGPENDING); |
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return -ERESTARTNOINTR; |
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} |
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static inline int task_sigpending(struct task_struct *p) |
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{ |
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return unlikely(test_tsk_thread_flag(p,TIF_SIGPENDING)); |
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} |
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static inline int signal_pending(struct task_struct *p) |
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{ |
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/* |
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* TIF_NOTIFY_SIGNAL isn't really a signal, but it requires the same |
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* behavior in terms of ensuring that we break out of wait loops |
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* so that notify signal callbacks can be processed. |
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*/ |
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if (unlikely(test_tsk_thread_flag(p, TIF_NOTIFY_SIGNAL))) |
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return 1; |
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return task_sigpending(p); |
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} |
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static inline int __fatal_signal_pending(struct task_struct *p) |
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{ |
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return unlikely(sigismember(&p->pending.signal, SIGKILL)); |
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} |
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static inline int fatal_signal_pending(struct task_struct *p) |
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{ |
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return task_sigpending(p) && __fatal_signal_pending(p); |
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} |
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static inline int signal_pending_state(long state, struct task_struct *p) |
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{ |
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if (!(state & (TASK_INTERRUPTIBLE | TASK_WAKEKILL))) |
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return 0; |
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if (!signal_pending(p)) |
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return 0; |
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return (state & TASK_INTERRUPTIBLE) || __fatal_signal_pending(p); |
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} |
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/* |
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* This should only be used in fault handlers to decide whether we |
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* should stop the current fault routine to handle the signals |
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* instead, especially with the case where we've got interrupted with |
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* a VM_FAULT_RETRY. |
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*/ |
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static inline bool fault_signal_pending(vm_fault_t fault_flags, |
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struct pt_regs *regs) |
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{ |
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return unlikely((fault_flags & VM_FAULT_RETRY) && |
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(fatal_signal_pending(current) || |
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(user_mode(regs) && signal_pending(current)))); |
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} |
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|
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/* |
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* Reevaluate whether the task has signals pending delivery. |
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* Wake the task if so. |
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* This is required every time the blocked sigset_t changes. |
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* callers must hold sighand->siglock. |
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*/ |
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extern void recalc_sigpending_and_wake(struct task_struct *t); |
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extern void recalc_sigpending(void); |
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extern void calculate_sigpending(void); |
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extern void signal_wake_up_state(struct task_struct *t, unsigned int state); |
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static inline void signal_wake_up(struct task_struct *t, bool resume) |
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{ |
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signal_wake_up_state(t, resume ? TASK_WAKEKILL : 0); |
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} |
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static inline void ptrace_signal_wake_up(struct task_struct *t, bool resume) |
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{ |
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signal_wake_up_state(t, resume ? __TASK_TRACED : 0); |
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} |
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void task_join_group_stop(struct task_struct *task); |
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#ifdef TIF_RESTORE_SIGMASK |
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/* |
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* Legacy restore_sigmask accessors. These are inefficient on |
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* SMP architectures because they require atomic operations. |
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*/ |
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|
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/** |
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* set_restore_sigmask() - make sure saved_sigmask processing gets done |
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* |
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* This sets TIF_RESTORE_SIGMASK and ensures that the arch signal code |
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* will run before returning to user mode, to process the flag. For |
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* all callers, TIF_SIGPENDING is already set or it's no harm to set |
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* it. TIF_RESTORE_SIGMASK need not be in the set of bits that the |
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* arch code will notice on return to user mode, in case those bits |
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* are scarce. We set TIF_SIGPENDING here to ensure that the arch |
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* signal code always gets run when TIF_RESTORE_SIGMASK is set. |
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*/ |
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static inline void set_restore_sigmask(void) |
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{ |
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set_thread_flag(TIF_RESTORE_SIGMASK); |
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} |
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static inline void clear_tsk_restore_sigmask(struct task_struct *task) |
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{ |
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clear_tsk_thread_flag(task, TIF_RESTORE_SIGMASK); |
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} |
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|
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static inline void clear_restore_sigmask(void) |
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{ |
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clear_thread_flag(TIF_RESTORE_SIGMASK); |
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} |
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static inline bool test_tsk_restore_sigmask(struct task_struct *task) |
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{ |
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return test_tsk_thread_flag(task, TIF_RESTORE_SIGMASK); |
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} |
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static inline bool test_restore_sigmask(void) |
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{ |
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return test_thread_flag(TIF_RESTORE_SIGMASK); |
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} |
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static inline bool test_and_clear_restore_sigmask(void) |
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{ |
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return test_and_clear_thread_flag(TIF_RESTORE_SIGMASK); |
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} |
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|
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#else /* TIF_RESTORE_SIGMASK */ |
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|
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/* Higher-quality implementation, used if TIF_RESTORE_SIGMASK doesn't exist. */ |
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static inline void set_restore_sigmask(void) |
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{ |
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current->restore_sigmask = true; |
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} |
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static inline void clear_tsk_restore_sigmask(struct task_struct *task) |
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{ |
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task->restore_sigmask = false; |
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} |
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static inline void clear_restore_sigmask(void) |
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{ |
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current->restore_sigmask = false; |
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} |
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static inline bool test_restore_sigmask(void) |
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{ |
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return current->restore_sigmask; |
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} |
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static inline bool test_tsk_restore_sigmask(struct task_struct *task) |
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{ |
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return task->restore_sigmask; |
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} |
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static inline bool test_and_clear_restore_sigmask(void) |
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{ |
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if (!current->restore_sigmask) |
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return false; |
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current->restore_sigmask = false; |
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return true; |
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} |
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#endif |
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|
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static inline void restore_saved_sigmask(void) |
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{ |
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if (test_and_clear_restore_sigmask()) |
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__set_current_blocked(¤t->saved_sigmask); |
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} |
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|
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extern int set_user_sigmask(const sigset_t __user *umask, size_t sigsetsize); |
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|
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static inline void restore_saved_sigmask_unless(bool interrupted) |
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{ |
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if (interrupted) |
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WARN_ON(!signal_pending(current)); |
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else |
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restore_saved_sigmask(); |
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} |
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|
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static inline sigset_t *sigmask_to_save(void) |
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{ |
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sigset_t *res = ¤t->blocked; |
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if (unlikely(test_restore_sigmask())) |
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res = ¤t->saved_sigmask; |
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return res; |
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} |
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|
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static inline int kill_cad_pid(int sig, int priv) |
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{ |
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return kill_pid(cad_pid, sig, priv); |
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} |
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|
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/* These can be the second arg to send_sig_info/send_group_sig_info. */ |
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#define SEND_SIG_NOINFO ((struct kernel_siginfo *) 0) |
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#define SEND_SIG_PRIV ((struct kernel_siginfo *) 1) |
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|
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/* |
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* True if we are on the alternate signal stack. |
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*/ |
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static inline int on_sig_stack(unsigned long sp) |
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{ |
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/* |
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* If the signal stack is SS_AUTODISARM then, by construction, we |
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* can't be on the signal stack unless user code deliberately set |
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* SS_AUTODISARM when we were already on it. |
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* |
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* This improves reliability: if user state gets corrupted such that |
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* the stack pointer points very close to the end of the signal stack, |
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* then this check will enable the signal to be handled anyway. |
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*/ |
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if (current->sas_ss_flags & SS_AUTODISARM) |
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return 0; |
|
|
|
#ifdef CONFIG_STACK_GROWSUP |
|
return sp >= current->sas_ss_sp && |
|
sp - current->sas_ss_sp < current->sas_ss_size; |
|
#else |
|
return sp > current->sas_ss_sp && |
|
sp - current->sas_ss_sp <= current->sas_ss_size; |
|
#endif |
|
} |
|
|
|
static inline int sas_ss_flags(unsigned long sp) |
|
{ |
|
if (!current->sas_ss_size) |
|
return SS_DISABLE; |
|
|
|
return on_sig_stack(sp) ? SS_ONSTACK : 0; |
|
} |
|
|
|
static inline void sas_ss_reset(struct task_struct *p) |
|
{ |
|
p->sas_ss_sp = 0; |
|
p->sas_ss_size = 0; |
|
p->sas_ss_flags = SS_DISABLE; |
|
} |
|
|
|
static inline unsigned long sigsp(unsigned long sp, struct ksignal *ksig) |
|
{ |
|
if (unlikely((ksig->ka.sa.sa_flags & SA_ONSTACK)) && ! sas_ss_flags(sp)) |
|
#ifdef CONFIG_STACK_GROWSUP |
|
return current->sas_ss_sp; |
|
#else |
|
return current->sas_ss_sp + current->sas_ss_size; |
|
#endif |
|
return sp; |
|
} |
|
|
|
extern void __cleanup_sighand(struct sighand_struct *); |
|
extern void flush_itimer_signals(void); |
|
|
|
#define tasklist_empty() \ |
|
list_empty(&init_task.tasks) |
|
|
|
#define next_task(p) \ |
|
list_entry_rcu((p)->tasks.next, struct task_struct, tasks) |
|
|
|
#define for_each_process(p) \ |
|
for (p = &init_task ; (p = next_task(p)) != &init_task ; ) |
|
|
|
extern bool current_is_single_threaded(void); |
|
|
|
/* |
|
* Careful: do_each_thread/while_each_thread is a double loop so |
|
* 'break' will not work as expected - use goto instead. |
|
*/ |
|
#define do_each_thread(g, t) \ |
|
for (g = t = &init_task ; (g = t = next_task(g)) != &init_task ; ) do |
|
|
|
#define while_each_thread(g, t) \ |
|
while ((t = next_thread(t)) != g) |
|
|
|
#define __for_each_thread(signal, t) \ |
|
list_for_each_entry_rcu(t, &(signal)->thread_head, thread_node) |
|
|
|
#define for_each_thread(p, t) \ |
|
__for_each_thread((p)->signal, t) |
|
|
|
/* Careful: this is a double loop, 'break' won't work as expected. */ |
|
#define for_each_process_thread(p, t) \ |
|
for_each_process(p) for_each_thread(p, t) |
|
|
|
typedef int (*proc_visitor)(struct task_struct *p, void *data); |
|
void walk_process_tree(struct task_struct *top, proc_visitor, void *); |
|
|
|
static inline |
|
struct pid *task_pid_type(struct task_struct *task, enum pid_type type) |
|
{ |
|
struct pid *pid; |
|
if (type == PIDTYPE_PID) |
|
pid = task_pid(task); |
|
else |
|
pid = task->signal->pids[type]; |
|
return pid; |
|
} |
|
|
|
static inline struct pid *task_tgid(struct task_struct *task) |
|
{ |
|
return task->signal->pids[PIDTYPE_TGID]; |
|
} |
|
|
|
/* |
|
* Without tasklist or RCU lock it is not safe to dereference |
|
* the result of task_pgrp/task_session even if task == current, |
|
* we can race with another thread doing sys_setsid/sys_setpgid. |
|
*/ |
|
static inline struct pid *task_pgrp(struct task_struct *task) |
|
{ |
|
return task->signal->pids[PIDTYPE_PGID]; |
|
} |
|
|
|
static inline struct pid *task_session(struct task_struct *task) |
|
{ |
|
return task->signal->pids[PIDTYPE_SID]; |
|
} |
|
|
|
static inline int get_nr_threads(struct task_struct *task) |
|
{ |
|
return task->signal->nr_threads; |
|
} |
|
|
|
static inline bool thread_group_leader(struct task_struct *p) |
|
{ |
|
return p->exit_signal >= 0; |
|
} |
|
|
|
static inline |
|
bool same_thread_group(struct task_struct *p1, struct task_struct *p2) |
|
{ |
|
return p1->signal == p2->signal; |
|
} |
|
|
|
static inline struct task_struct *next_thread(const struct task_struct *p) |
|
{ |
|
return list_entry_rcu(p->thread_group.next, |
|
struct task_struct, thread_group); |
|
} |
|
|
|
static inline int thread_group_empty(struct task_struct *p) |
|
{ |
|
return list_empty(&p->thread_group); |
|
} |
|
|
|
#define delay_group_leader(p) \ |
|
(thread_group_leader(p) && !thread_group_empty(p)) |
|
|
|
extern bool thread_group_exited(struct pid *pid); |
|
|
|
extern struct sighand_struct *__lock_task_sighand(struct task_struct *task, |
|
unsigned long *flags); |
|
|
|
static inline struct sighand_struct *lock_task_sighand(struct task_struct *task, |
|
unsigned long *flags) |
|
{ |
|
struct sighand_struct *ret; |
|
|
|
ret = __lock_task_sighand(task, flags); |
|
(void)__cond_lock(&task->sighand->siglock, ret); |
|
return ret; |
|
} |
|
|
|
static inline void unlock_task_sighand(struct task_struct *task, |
|
unsigned long *flags) |
|
{ |
|
spin_unlock_irqrestore(&task->sighand->siglock, *flags); |
|
} |
|
|
|
static inline unsigned long task_rlimit(const struct task_struct *task, |
|
unsigned int limit) |
|
{ |
|
return READ_ONCE(task->signal->rlim[limit].rlim_cur); |
|
} |
|
|
|
static inline unsigned long task_rlimit_max(const struct task_struct *task, |
|
unsigned int limit) |
|
{ |
|
return READ_ONCE(task->signal->rlim[limit].rlim_max); |
|
} |
|
|
|
static inline unsigned long rlimit(unsigned int limit) |
|
{ |
|
return task_rlimit(current, limit); |
|
} |
|
|
|
static inline unsigned long rlimit_max(unsigned int limit) |
|
{ |
|
return task_rlimit_max(current, limit); |
|
} |
|
|
|
#endif /* _LINUX_SCHED_SIGNAL_H */
|
|
|