#include <linux/sched/prio.h>
-
-struct sched_param {
- int sched_priority;
-};
-
#include <asm/param.h> /* for HZ */
#include <linux/capability.h>
#include <asm/processor.h>
-#define SCHED_ATTR_SIZE_VER0 48 /* sizeof first published struct */
-
-/*
- * Extended scheduling parameters data structure.
- *
- * This is needed because the original struct sched_param can not be
- * altered without introducing ABI issues with legacy applications
- * (e.g., in sched_getparam()).
- *
- * However, the possibility of specifying more than just a priority for
- * the tasks may be useful for a wide variety of application fields, e.g.,
- * multimedia, streaming, automation and control, and many others.
- *
- * This variant (sched_attr) is meant at describing a so-called
- * sporadic time-constrained task. In such model a task is specified by:
- * - the activation period or minimum instance inter-arrival time;
- * - the maximum (or average, depending on the actual scheduling
- * discipline) computation time of all instances, a.k.a. runtime;
- * - the deadline (relative to the actual activation time) of each
- * instance.
- * Very briefly, a periodic (sporadic) task asks for the execution of
- * some specific computation --which is typically called an instance--
- * (at most) every period. Moreover, each instance typically lasts no more
- * than the runtime and must be completed by time instant t equal to
- * the instance activation time + the deadline.
- *
- * This is reflected by the actual fields of the sched_attr structure:
- *
- * @size size of the structure, for fwd/bwd compat.
- *
- * @sched_policy task's scheduling policy
- * @sched_flags for customizing the scheduler behaviour
- * @sched_nice task's nice value (SCHED_NORMAL/BATCH)
- * @sched_priority task's static priority (SCHED_FIFO/RR)
- * @sched_deadline representative of the task's deadline
- * @sched_runtime representative of the task's runtime
- * @sched_period representative of the task's period
- *
- * Given this task model, there are a multiplicity of scheduling algorithms
- * and policies, that can be used to ensure all the tasks will make their
- * timing constraints.
- *
- * As of now, the SCHED_DEADLINE policy (sched_dl scheduling class) is the
- * only user of this new interface. More information about the algorithm
- * available in the scheduling class file or in Documentation/.
- */
-struct sched_attr {
- u32 size;
-
- u32 sched_policy;
- u64 sched_flags;
-
- /* SCHED_NORMAL, SCHED_BATCH */
- s32 sched_nice;
-
- /* SCHED_FIFO, SCHED_RR */
- u32 sched_priority;
-
- /* SCHED_DEADLINE */
- u64 sched_runtime;
- u64 sched_deadline;
- u64 sched_period;
-};
+struct sched_attr;
+struct sched_param;
struct futex_pi_state;
struct robust_list_head;
struct filename;
struct nameidata;
-/*
- * These are the constant used to fake the fixed-point load-average
- * counting. Some notes:
- * - 11 bit fractions expand to 22 bits by the multiplies: this gives
- * a load-average precision of 10 bits integer + 11 bits fractional
- * - if you want to count load-averages more often, you need more
- * precision, or rounding will get you. With 2-second counting freq,
- * the EXP_n values would be 1981, 2034 and 2043 if still using only
- * 11 bit fractions.
- */
-extern unsigned long avenrun[]; /* Load averages */
-extern void get_avenrun(unsigned long *loads, unsigned long offset, int shift);
-
-#define FSHIFT 11 /* nr of bits of precision */
-#define FIXED_1 (1<<FSHIFT) /* 1.0 as fixed-point */
-#define LOAD_FREQ (5*HZ+1) /* 5 sec intervals */
-#define EXP_1 1884 /* 1/exp(5sec/1min) as fixed-point */
-#define EXP_5 2014 /* 1/exp(5sec/5min) */
-#define EXP_15 2037 /* 1/exp(5sec/15min) */
-
-#define CALC_LOAD(load,exp,n) \
- load *= exp; \
- load += n*(FIXED_1-exp); \
- load >>= FSHIFT;
+struct signal_struct;
+struct sighand_struct;
extern unsigned long total_forks;
extern int nr_threads;
extern unsigned long nr_iowait_cpu(int cpu);
extern void get_iowait_load(unsigned long *nr_waiters, unsigned long *load);
-extern void calc_global_load(unsigned long ticks);
-
#if defined(CONFIG_SMP) && defined(CONFIG_NO_HZ_COMMON)
extern void cpu_load_update_nohz_start(void);
extern void cpu_load_update_nohz_stop(void);
void __noreturn do_task_dead(void);
struct nsproxy;
-struct user_namespace;
#ifdef CONFIG_MMU
extern void arch_pick_mmap_layout(struct mm_struct *mm);
static inline void arch_pick_mmap_layout(struct mm_struct *mm) {}
#endif
-#define SUID_DUMP_DISABLE 0 /* No setuid dumping */
-#define SUID_DUMP_USER 1 /* Dump as user of process */
-#define SUID_DUMP_ROOT 2 /* Dump as root */
-
-/* mm flags */
-
-/* for SUID_DUMP_* above */
-#define MMF_DUMPABLE_BITS 2
-#define MMF_DUMPABLE_MASK ((1 << MMF_DUMPABLE_BITS) - 1)
-
-extern void set_dumpable(struct mm_struct *mm, int value);
-/*
- * This returns the actual value of the suid_dumpable flag. For things
- * that are using this for checking for privilege transitions, it must
- * test against SUID_DUMP_USER rather than treating it as a boolean
- * value.
- */
-static inline int __get_dumpable(unsigned long mm_flags)
-{
- return mm_flags & MMF_DUMPABLE_MASK;
-}
-
-static inline int get_dumpable(struct mm_struct *mm)
-{
- return __get_dumpable(mm->flags);
-}
-
-/* coredump filter bits */
-#define MMF_DUMP_ANON_PRIVATE 2
-#define MMF_DUMP_ANON_SHARED 3
-#define MMF_DUMP_MAPPED_PRIVATE 4
-#define MMF_DUMP_MAPPED_SHARED 5
-#define MMF_DUMP_ELF_HEADERS 6
-#define MMF_DUMP_HUGETLB_PRIVATE 7
-#define MMF_DUMP_HUGETLB_SHARED 8
-#define MMF_DUMP_DAX_PRIVATE 9
-#define MMF_DUMP_DAX_SHARED 10
-
-#define MMF_DUMP_FILTER_SHIFT MMF_DUMPABLE_BITS
-#define MMF_DUMP_FILTER_BITS 9
-#define MMF_DUMP_FILTER_MASK \
- (((1 << MMF_DUMP_FILTER_BITS) - 1) << MMF_DUMP_FILTER_SHIFT)
-#define MMF_DUMP_FILTER_DEFAULT \
- ((1 << MMF_DUMP_ANON_PRIVATE) | (1 << MMF_DUMP_ANON_SHARED) |\
- (1 << MMF_DUMP_HUGETLB_PRIVATE) | MMF_DUMP_MASK_DEFAULT_ELF)
-
-#ifdef CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS
-# define MMF_DUMP_MASK_DEFAULT_ELF (1 << MMF_DUMP_ELF_HEADERS)
-#else
-# define MMF_DUMP_MASK_DEFAULT_ELF 0
-#endif
- /* leave room for more dump flags */
-#define MMF_VM_MERGEABLE 16 /* KSM may merge identical pages */
-#define MMF_VM_HUGEPAGE 17 /* set when VM_HUGEPAGE is set on vma */
-/*
- * This one-shot flag is dropped due to necessity of changing exe once again
- * on NFS restore
- */
-//#define MMF_EXE_FILE_CHANGED 18 /* see prctl_set_mm_exe_file() */
-
-#define MMF_HAS_UPROBES 19 /* has uprobes */
-#define MMF_RECALC_UPROBES 20 /* MMF_HAS_UPROBES can be wrong */
-#define MMF_OOM_SKIP 21 /* mm is of no interest for the OOM killer */
-#define MMF_UNSTABLE 22 /* mm is unstable for copy_from_user */
-#define MMF_HUGE_ZERO_PAGE 23 /* mm has ever used the global huge zero page */
-
-#define MMF_INIT_MASK (MMF_DUMPABLE_MASK | MMF_DUMP_FILTER_MASK)
-
-struct sighand_struct {
- atomic_t count;
- struct k_sigaction action[_NSIG];
- spinlock_t siglock;
- wait_queue_head_t signalfd_wqh;
-};
-
struct pacct_struct {
int ac_flag;
long ac_exitcode;
#include <linux/rwsem.h>
struct autogroup;
-/*
- * NOTE! "signal_struct" does not have its own
- * locking, because a shared signal_struct always
- * implies a shared sighand_struct, so locking
- * sighand_struct is always a proper superset of
- * the locking of signal_struct.
- */
-struct signal_struct {
- atomic_t sigcnt;
- atomic_t live;
- int nr_threads;
- struct list_head thread_head;
-
- wait_queue_head_t wait_chldexit; /* for wait4() */
-
- /* current thread group signal load-balancing target: */
- struct task_struct *curr_target;
-
- /* shared signal handling: */
- struct sigpending shared_pending;
-
- /* thread group exit support */
- int group_exit_code;
- /* overloaded:
- * - notify group_exit_task when ->count is equal to notify_count
- * - everyone except group_exit_task is stopped during signal delivery
- * of fatal signals, group_exit_task processes the signal.
- */
- int notify_count;
- struct task_struct *group_exit_task;
-
- /* thread group stop support, overloads group_exit_code too */
- int group_stop_count;
- unsigned int flags; /* see SIGNAL_* flags below */
-
- /*
- * PR_SET_CHILD_SUBREAPER marks a process, like a service
- * manager, to re-parent orphan (double-forking) child processes
- * to this process instead of 'init'. The service manager is
- * able to receive SIGCHLD signals and is able to investigate
- * the process until it calls wait(). All children of this
- * process will inherit a flag if they should look for a
- * child_subreaper process at exit.
- */
- unsigned int is_child_subreaper:1;
- unsigned int has_child_subreaper:1;
-
-#ifdef CONFIG_POSIX_TIMERS
-
- /* POSIX.1b Interval Timers */
- int posix_timer_id;
- struct list_head posix_timers;
-
- /* ITIMER_REAL timer for the process */
- struct hrtimer real_timer;
- ktime_t it_real_incr;
-
- /*
- * ITIMER_PROF and ITIMER_VIRTUAL timers for the process, we use
- * CPUCLOCK_PROF and CPUCLOCK_VIRT for indexing array as these
- * values are defined to 0 and 1 respectively
- */
- struct cpu_itimer it[2];
-
- /*
- * Thread group totals for process CPU timers.
- * See thread_group_cputimer(), et al, for details.
- */
- struct thread_group_cputimer cputimer;
-
- /* Earliest-expiration cache. */
- struct task_cputime cputime_expires;
-
- struct list_head cpu_timers[3];
-
-#endif
-
- struct pid *leader_pid;
-
-#ifdef CONFIG_NO_HZ_FULL
- atomic_t tick_dep_mask;
-#endif
-
- struct pid *tty_old_pgrp;
-
- /* boolean value for session group leader */
- int leader;
-
- struct tty_struct *tty; /* NULL if no tty */
-
-#ifdef CONFIG_SCHED_AUTOGROUP
- struct autogroup *autogroup;
-#endif
- /*
- * Cumulative resource counters for dead threads in the group,
- * and for reaped dead child processes forked by this group.
- * Live threads maintain their own counters and add to these
- * in __exit_signal, except for the group leader.
- */
- seqlock_t stats_lock;
- u64 utime, stime, cutime, cstime;
- u64 gtime;
- u64 cgtime;
- struct prev_cputime prev_cputime;
- unsigned long nvcsw, nivcsw, cnvcsw, cnivcsw;
- unsigned long min_flt, maj_flt, cmin_flt, cmaj_flt;
- unsigned long inblock, oublock, cinblock, coublock;
- unsigned long maxrss, cmaxrss;
- struct task_io_accounting ioac;
-
- /*
- * Cumulative ns of schedule CPU time fo dead threads in the
- * group, not including a zombie group leader, (This only differs
- * from jiffies_to_ns(utime + stime) if sched_clock uses something
- * other than jiffies.)
- */
- unsigned long long sum_sched_runtime;
-
- /*
- * We don't bother to synchronize most readers of this at all,
- * because there is no reader checking a limit that actually needs
- * to get both rlim_cur and rlim_max atomically, and either one
- * alone is a single word that can safely be read normally.
- * getrlimit/setrlimit use task_lock(current->group_leader) to
- * protect this instead of the siglock, because they really
- * have no need to disable irqs.
- */
- struct rlimit rlim[RLIM_NLIMITS];
-
-#ifdef CONFIG_BSD_PROCESS_ACCT
- struct pacct_struct pacct; /* per-process accounting information */
-#endif
-#ifdef CONFIG_TASKSTATS
- struct taskstats *stats;
-#endif
-#ifdef CONFIG_AUDIT
- unsigned audit_tty;
- struct tty_audit_buf *tty_audit_buf;
-#endif
-
- /*
- * Thread is the potential origin of an oom condition; kill first on
- * oom
- */
- bool oom_flag_origin;
- short oom_score_adj; /* OOM kill score adjustment */
- short oom_score_adj_min; /* OOM kill score adjustment min value.
- * Only settable by CAP_SYS_RESOURCE. */
- struct mm_struct *oom_mm; /* recorded mm when the thread group got
- * killed by the oom killer */
-
- struct mutex cred_guard_mutex; /* guard against foreign influences on
- * credential calculations
- * (notably. ptrace) */
-};
-
-/*
- * Bits in flags field of signal_struct.
- */
-#define SIGNAL_STOP_STOPPED 0x00000001 /* job control stop in effect */
-#define SIGNAL_STOP_CONTINUED 0x00000002 /* SIGCONT since WCONTINUED reap */
-#define SIGNAL_GROUP_EXIT 0x00000004 /* group exit in progress */
-#define SIGNAL_GROUP_COREDUMP 0x00000008 /* coredump in progress */
-/*
- * Pending notifications to parent.
- */
-#define SIGNAL_CLD_STOPPED 0x00000010
-#define SIGNAL_CLD_CONTINUED 0x00000020
-#define SIGNAL_CLD_MASK (SIGNAL_CLD_STOPPED|SIGNAL_CLD_CONTINUED)
-
-#define SIGNAL_UNKILLABLE 0x00000040 /* for init: ignore fatal signals */
-
-#define SIGNAL_STOP_MASK (SIGNAL_CLD_MASK | SIGNAL_STOP_STOPPED | \
- SIGNAL_STOP_CONTINUED)
-
-static inline void signal_set_stop_flags(struct signal_struct *sig,
- unsigned int flags)
-{
- WARN_ON(sig->flags & (SIGNAL_GROUP_EXIT|SIGNAL_GROUP_COREDUMP));
- sig->flags = (sig->flags & ~SIGNAL_STOP_MASK) | flags;
-}
-
-/* If true, all threads except ->group_exit_task have pending SIGKILL */
-static inline int signal_group_exit(const struct signal_struct *sig)
-{
- return (sig->flags & SIGNAL_GROUP_EXIT) ||
- (sig->group_exit_task != NULL);
-}
-
-/*
- * Some day this will be a full-fledged user tracking system..
- */
-struct user_struct {
- atomic_t __count; /* reference count */
- atomic_t processes; /* How many processes does this user have? */
- atomic_t sigpending; /* How many pending signals does this user have? */
-#ifdef CONFIG_FANOTIFY
- atomic_t fanotify_listeners;
-#endif
-#ifdef CONFIG_EPOLL
- atomic_long_t epoll_watches; /* The number of file descriptors currently watched */
-#endif
-#ifdef CONFIG_POSIX_MQUEUE
- /* protected by mq_lock */
- unsigned long mq_bytes; /* How many bytes can be allocated to mqueue? */
-#endif
- unsigned long locked_shm; /* How many pages of mlocked shm ? */
- unsigned long unix_inflight; /* How many files in flight in unix sockets */
- atomic_long_t pipe_bufs; /* how many pages are allocated in pipe buffers */
-
-#ifdef CONFIG_KEYS
- struct key *uid_keyring; /* UID specific keyring */
- struct key *session_keyring; /* UID's default session keyring */
-#endif
-
- /* Hash table maintenance information */
- struct hlist_node uidhash_node;
- kuid_t uid;
-
-#if defined(CONFIG_PERF_EVENTS) || defined(CONFIG_BPF_SYSCALL)
- atomic_long_t locked_vm;
-#endif
-};
-
-extern int uids_sysfs_init(void);
-
-extern struct user_struct *find_user(kuid_t);
-
-extern struct user_struct root_user;
-#define INIT_USER (&root_user)
-
-
struct backing_dev_info;
struct reclaim_state;
};
#endif /* CONFIG_SCHED_INFO */
-#ifdef CONFIG_TASK_DELAY_ACCT
-struct task_delay_info {
- spinlock_t lock;
- unsigned int flags; /* Private per-task flags */
-
- /* For each stat XXX, add following, aligned appropriately
- *
- * struct timespec XXX_start, XXX_end;
- * u64 XXX_delay;
- * u32 XXX_count;
- *
- * Atomicity of updates to XXX_delay, XXX_count protected by
- * single lock above (split into XXX_lock if contention is an issue).
- */
-
- /*
- * XXX_count is incremented on every XXX operation, the delay
- * associated with the operation is added to XXX_delay.
- * XXX_delay contains the accumulated delay time in nanoseconds.
- */
- u64 blkio_start; /* Shared by blkio, swapin */
- u64 blkio_delay; /* wait for sync block io completion */
- u64 swapin_delay; /* wait for swapin block io completion */
- u32 blkio_count; /* total count of the number of sync block */
- /* io operations performed */
- u32 swapin_count; /* total count of the number of swapin block */
- /* io operations performed */
-
- u64 freepages_start;
- u64 freepages_delay; /* wait for memory reclaim */
- u32 freepages_count; /* total count of memory reclaim */
-};
-#endif /* CONFIG_TASK_DELAY_ACCT */
+struct task_delay_info;
static inline int sched_info_on(void)
{
struct page_frag task_frag;
-#ifdef CONFIG_TASK_DELAY_ACCT
- struct task_delay_info *delays;
+#ifdef CONFIG_TASK_DELAY_ACCT
+ struct task_delay_info *delays;
#endif
+
#ifdef CONFIG_FAULT_INJECTION
int make_it_fail;
#endif
#define cpu_relax_yield() cpu_relax()
#endif
-/*
- * Do not use outside of architecture code which knows its limitations.
- *
- * sched_clock() has no promise of monotonicity or bounded drift between
- * CPUs, use (which you should not) requires disabling IRQs.
- *
- * Please use one of the three interfaces below.
- */
-extern unsigned long long notrace sched_clock(void);
-/*
- * See the comment in kernel/sched/clock.c
- */
-extern u64 running_clock(void);
-extern u64 sched_clock_cpu(int cpu);
-
-
-extern void sched_clock_init(void);
-
-#ifndef CONFIG_HAVE_UNSTABLE_SCHED_CLOCK
-static inline void sched_clock_init_late(void)
-{
-}
-
-static inline void sched_clock_tick(void)
-{
-}
-
-static inline void clear_sched_clock_stable(void)
-{
-}
-
-static inline void sched_clock_idle_sleep_event(void)
-{
-}
-
-static inline void sched_clock_idle_wakeup_event(u64 delta_ns)
-{
-}
-
-static inline u64 cpu_clock(int cpu)
-{
- return sched_clock();
-}
-
-static inline u64 local_clock(void)
-{
- return sched_clock();
-}
-#else
-extern void sched_clock_init_late(void);
-/*
- * Architectures can set this to 1 if they have specified
- * CONFIG_HAVE_UNSTABLE_SCHED_CLOCK in their arch Kconfig,
- * but then during bootup it turns out that sched_clock()
- * is reliable after all:
- */
-extern int sched_clock_stable(void);
-extern void clear_sched_clock_stable(void);
-
-extern void sched_clock_tick(void);
-extern void sched_clock_idle_sleep_event(void);
-extern void sched_clock_idle_wakeup_event(u64 delta_ns);
-
-/*
- * As outlined in clock.c, provides a fast, high resolution, nanosecond
- * time source that is monotonic per cpu argument and has bounded drift
- * between cpus.
- *
- * ######################### BIG FAT WARNING ##########################
- * # when comparing cpu_clock(i) to cpu_clock(j) for i != j, time can #
- * # go backwards !! #
- * ####################################################################
- */
-static inline u64 cpu_clock(int cpu)
-{
- return sched_clock_cpu(cpu);
-}
-
-static inline u64 local_clock(void)
-{
- return sched_clock_cpu(raw_smp_processor_id());
-}
-#endif
-
-#ifdef CONFIG_IRQ_TIME_ACCOUNTING
-/*
- * An i/f to runtime opt-in for irq time accounting based off of sched_clock.
- * The reason for this explicit opt-in is not to have perf penalty with
- * slow sched_clocks.
- */
-extern void enable_sched_clock_irqtime(void);
-extern void disable_sched_clock_irqtime(void);
-#else
-static inline void enable_sched_clock_irqtime(void) {}
-static inline void disable_sched_clock_irqtime(void) {}
-#endif
-
extern unsigned long long
task_sched_runtime(struct task_struct *task);
#define sched_exec() {}
#endif
-extern void sched_clock_idle_sleep_event(void);
-extern void sched_clock_idle_wakeup_event(u64 delta_ns);
-
#ifdef CONFIG_HOTPLUG_CPU
extern void idle_task_exit(void);
#else
extern u64 scheduler_tick_max_deferment(void);
#endif
-#ifdef CONFIG_SCHED_AUTOGROUP
-extern void sched_autogroup_create_attach(struct task_struct *p);
-extern void sched_autogroup_detach(struct task_struct *p);
-extern void sched_autogroup_fork(struct signal_struct *sig);
-extern void sched_autogroup_exit(struct signal_struct *sig);
-extern void sched_autogroup_exit_task(struct task_struct *p);
-#ifdef CONFIG_PROC_FS
-extern void proc_sched_autogroup_show_task(struct task_struct *p, struct seq_file *m);
-extern int proc_sched_autogroup_set_nice(struct task_struct *p, int nice);
-#endif
-#else
-static inline void sched_autogroup_create_attach(struct task_struct *p) { }
-static inline void sched_autogroup_detach(struct task_struct *p) { }
-static inline void sched_autogroup_fork(struct signal_struct *sig) { }
-static inline void sched_autogroup_exit(struct signal_struct *sig) { }
-static inline void sched_autogroup_exit_task(struct task_struct *p) { }
-#endif
-
extern int yield_to(struct task_struct *p, bool preempt);
extern void set_user_nice(struct task_struct *p, long nice);
extern int task_prio(const struct task_struct *p);
extern struct task_struct *find_task_by_pid_ns(pid_t nr,
struct pid_namespace *ns);
-/* per-UID process charging. */
-extern struct user_struct * alloc_uid(kuid_t);
-static inline struct user_struct *get_uid(struct user_struct *u)
-{
- atomic_inc(&u->__count);
- return u;
-}
-extern void free_uid(struct user_struct *);
-
#include <asm/current.h>
extern void xtime_update(unsigned long ticks);
extern void sched_dead(struct task_struct *p);
extern void proc_caches_init(void);
-extern void flush_signals(struct task_struct *);
-extern void ignore_signals(struct task_struct *);
-extern void flush_signal_handlers(struct task_struct *, int force_default);
-extern int dequeue_signal(struct task_struct *tsk, sigset_t *mask, siginfo_t *info);
-
-static inline int kernel_dequeue_signal(siginfo_t *info)
-{
- struct task_struct *tsk = current;
- siginfo_t __info;
- int ret;
-
- spin_lock_irq(&tsk->sighand->siglock);
- ret = dequeue_signal(tsk, &tsk->blocked, info ?: &__info);
- spin_unlock_irq(&tsk->sighand->siglock);
-
- return ret;
-}
-
-static inline void kernel_signal_stop(void)
-{
- spin_lock_irq(¤t->sighand->siglock);
- if (current->jobctl & JOBCTL_STOP_DEQUEUED)
- __set_current_state(TASK_STOPPED);
- spin_unlock_irq(¤t->sighand->siglock);
-
- schedule();
-}
extern void release_task(struct task_struct * p);
-extern int send_sig_info(int, struct siginfo *, struct task_struct *);
-extern int force_sigsegv(int, struct task_struct *);
-extern int force_sig_info(int, struct siginfo *, struct task_struct *);
-extern int __kill_pgrp_info(int sig, struct siginfo *info, struct pid *pgrp);
-extern int kill_pid_info(int sig, struct siginfo *info, struct pid *pid);
-extern int kill_pid_info_as_cred(int, struct siginfo *, struct pid *,
- const struct cred *, u32);
-extern int kill_pgrp(struct pid *pid, int sig, int priv);
-extern int kill_pid(struct pid *pid, int sig, int priv);
-extern int kill_proc_info(int, struct siginfo *, pid_t);
-extern __must_check bool do_notify_parent(struct task_struct *, int);
-extern void __wake_up_parent(struct task_struct *p, struct task_struct *parent);
-extern void force_sig(int, struct task_struct *);
-extern int send_sig(int, struct task_struct *, int);
-extern int zap_other_threads(struct task_struct *p);
-extern struct sigqueue *sigqueue_alloc(void);
-extern void sigqueue_free(struct sigqueue *);
-extern int send_sigqueue(struct sigqueue *, struct task_struct *, int group);
-extern int do_sigaction(int, struct k_sigaction *, struct k_sigaction *);
-
-#ifdef TIF_RESTORE_SIGMASK
-/*
- * Legacy restore_sigmask accessors. These are inefficient on
- * SMP architectures because they require atomic operations.
- */
-
-/**
- * set_restore_sigmask() - make sure saved_sigmask processing gets done
- *
- * This sets TIF_RESTORE_SIGMASK and ensures that the arch signal code
- * will run before returning to user mode, to process the flag. For
- * all callers, TIF_SIGPENDING is already set or it's no harm to set
- * it. TIF_RESTORE_SIGMASK need not be in the set of bits that the
- * arch code will notice on return to user mode, in case those bits
- * are scarce. We set TIF_SIGPENDING here to ensure that the arch
- * signal code always gets run when TIF_RESTORE_SIGMASK is set.
- */
-static inline void set_restore_sigmask(void)
-{
- set_thread_flag(TIF_RESTORE_SIGMASK);
- WARN_ON(!test_thread_flag(TIF_SIGPENDING));
-}
-static inline void clear_restore_sigmask(void)
-{
- clear_thread_flag(TIF_RESTORE_SIGMASK);
-}
-static inline bool test_restore_sigmask(void)
-{
- return test_thread_flag(TIF_RESTORE_SIGMASK);
-}
-static inline bool test_and_clear_restore_sigmask(void)
-{
- return test_and_clear_thread_flag(TIF_RESTORE_SIGMASK);
-}
-
-#else /* TIF_RESTORE_SIGMASK */
-
-/* Higher-quality implementation, used if TIF_RESTORE_SIGMASK doesn't exist. */
-static inline void set_restore_sigmask(void)
-{
- current->restore_sigmask = true;
- WARN_ON(!test_thread_flag(TIF_SIGPENDING));
-}
-static inline void clear_restore_sigmask(void)
-{
- current->restore_sigmask = false;
-}
-static inline bool test_restore_sigmask(void)
-{
- return current->restore_sigmask;
-}
-static inline bool test_and_clear_restore_sigmask(void)
-{
- if (!current->restore_sigmask)
- return false;
- current->restore_sigmask = false;
- return true;
-}
-#endif
-
-static inline void restore_saved_sigmask(void)
-{
- if (test_and_clear_restore_sigmask())
- __set_current_blocked(¤t->saved_sigmask);
-}
-
-static inline sigset_t *sigmask_to_save(void)
-{
- sigset_t *res = ¤t->blocked;
- if (unlikely(test_restore_sigmask()))
- res = ¤t->saved_sigmask;
- return res;
-}
-
-static inline int kill_cad_pid(int sig, int priv)
-{
- return kill_pid(cad_pid, sig, priv);
-}
-
-/* These can be the second arg to send_sig_info/send_group_sig_info. */
-#define SEND_SIG_NOINFO ((struct siginfo *) 0)
-#define SEND_SIG_PRIV ((struct siginfo *) 1)
-#define SEND_SIG_FORCED ((struct siginfo *) 2)
-
-/*
- * True if we are on the alternate signal stack.
- */
-static inline int on_sig_stack(unsigned long sp)
-{
- /*
- * If the signal stack is SS_AUTODISARM then, by construction, we
- * can't be on the signal stack unless user code deliberately set
- * SS_AUTODISARM when we were already on it.
- *
- * This improves reliability: if user state gets corrupted such that
- * the stack pointer points very close to the end of the signal stack,
- * then this check will enable the signal to be handled anyway.
- */
- if (current->sas_ss_flags & SS_AUTODISARM)
- 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;
-}
-
-/*
- * Routines for handling mm_structs
- */
-extern struct mm_struct * mm_alloc(void);
-
-/**
- * mmgrab() - Pin a &struct mm_struct.
- * @mm: The &struct mm_struct to pin.
- *
- * Make sure that @mm will not get freed even after the owning task
- * exits. This doesn't guarantee that the associated address space
- * will still exist later on and mmget_not_zero() has to be used before
- * accessing it.
- *
- * This is a preferred way to to pin @mm for a longer/unbounded amount
- * of time.
- *
- * Use mmdrop() to release the reference acquired by mmgrab().
- *
- * See also <Documentation/vm/active_mm.txt> for an in-depth explanation
- * of &mm_struct.mm_count vs &mm_struct.mm_users.
- */
-static inline void mmgrab(struct mm_struct *mm)
-{
- atomic_inc(&mm->mm_count);
-}
-
-/* mmdrop drops the mm and the page tables */
-extern void __mmdrop(struct mm_struct *);
-static inline void mmdrop(struct mm_struct *mm)
-{
- if (unlikely(atomic_dec_and_test(&mm->mm_count)))
- __mmdrop(mm);
-}
-
-static inline void mmdrop_async_fn(struct work_struct *work)
-{
- struct mm_struct *mm = container_of(work, struct mm_struct, async_put_work);
- __mmdrop(mm);
-}
-
-static inline void mmdrop_async(struct mm_struct *mm)
-{
- if (unlikely(atomic_dec_and_test(&mm->mm_count))) {
- INIT_WORK(&mm->async_put_work, mmdrop_async_fn);
- schedule_work(&mm->async_put_work);
- }
-}
-
-/**
- * mmget() - Pin the address space associated with a &struct mm_struct.
- * @mm: The address space to pin.
- *
- * Make sure that the address space of the given &struct mm_struct doesn't
- * go away. This does not protect against parts of the address space being
- * modified or freed, however.
- *
- * Never use this function to pin this address space for an
- * unbounded/indefinite amount of time.
- *
- * Use mmput() to release the reference acquired by mmget().
- *
- * See also <Documentation/vm/active_mm.txt> for an in-depth explanation
- * of &mm_struct.mm_count vs &mm_struct.mm_users.
- */
-static inline void mmget(struct mm_struct *mm)
-{
- atomic_inc(&mm->mm_users);
-}
-
-static inline bool mmget_not_zero(struct mm_struct *mm)
-{
- return atomic_inc_not_zero(&mm->mm_users);
-}
-
-/* mmput gets rid of the mappings and all user-space */
-extern void mmput(struct mm_struct *);
-#ifdef CONFIG_MMU
-/* same as above but performs the slow path from the async context. Can
- * be called from the atomic context as well
- */
-extern void mmput_async(struct mm_struct *);
-#endif
-
-/* Grab a reference to a task's mm, if it is not already going away */
-extern struct mm_struct *get_task_mm(struct task_struct *task);
-/*
- * Grab a reference to a task's mm, if it is not already going away
- * and ptrace_may_access with the mode parameter passed to it
- * succeeds.
- */
-extern struct mm_struct *mm_access(struct task_struct *task, unsigned int mode);
-/* Remove the current tasks stale references to the old mm_struct */
-extern void mm_release(struct task_struct *, struct mm_struct *);
#ifdef CONFIG_HAVE_COPY_THREAD_TLS
extern int copy_thread_tls(unsigned long, unsigned long, unsigned long,
#endif
extern void exit_files(struct task_struct *);
-extern void __cleanup_sighand(struct sighand_struct *);
extern void exit_itimers(struct signal_struct *);
-extern void flush_itimer_signals(void);
extern void do_group_exit(int);
}
#endif
-#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 int get_nr_threads(struct task_struct *tsk)
-{
- return tsk->signal->nr_threads;
-}
-
-static inline bool thread_group_leader(struct task_struct *p)
-{
- return p->exit_signal >= 0;
-}
-
-/* Do to the insanities of de_thread it is possible for a process
- * to have the pid of the thread group leader without actually being
- * the thread group leader. For iteration through the pids in proc
- * all we care about is that we have a task with the appropriate
- * pid, we don't actually care if we have the right task.
- */
-static inline bool has_group_leader_pid(struct task_struct *p)
-{
- return task_pid(p) == p->signal->leader_pid;
-}
-
-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))
-
/*
* Protects ->fs, ->files, ->mm, ->group_info, ->comm, keyring
* subscriptions and synchronises with wait4(). Also used in procfs. Also
spin_unlock(&p->alloc_lock);
}
-extern struct sighand_struct *__lock_task_sighand(struct task_struct *tsk,
- unsigned long *flags);
-
-static inline struct sighand_struct *lock_task_sighand(struct task_struct *tsk,
- unsigned long *flags)
-{
- struct sighand_struct *ret;
-
- ret = __lock_task_sighand(tsk, flags);
- (void)__cond_lock(&tsk->sighand->siglock, ret);
- return ret;
-}
-
-static inline void unlock_task_sighand(struct task_struct *tsk,
- unsigned long *flags)
-{
- spin_unlock_irqrestore(&tsk->sighand->siglock, *flags);
-}
-
#ifdef CONFIG_THREAD_INFO_IN_TASK
static inline struct thread_info *task_thread_info(struct task_struct *task)
}
#endif /* CONFIG_MEMCG */
-static inline unsigned long task_rlimit(const struct task_struct *tsk,
- unsigned int limit)
-{
- return READ_ONCE(tsk->signal->rlim[limit].rlim_cur);
-}
-
-static inline unsigned long task_rlimit_max(const struct task_struct *tsk,
- unsigned int limit)
-{
- return READ_ONCE(tsk->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);
-}
-
#define SCHED_CPUFREQ_RT (1U << 0)
#define SCHED_CPUFREQ_DL (1U << 1)
#define SCHED_CPUFREQ_IOWAIT (1U << 2)