| 1 | #ifndef _LINUX_SCHED_H |
| 2 | #define _LINUX_SCHED_H |
| 3 | |
| 4 | /* |
| 5 | * cloning flags: |
| 6 | */ |
| 7 | #define CSIGNAL 0x000000ff /* signal mask to be sent at exit */ |
| 8 | #define CLONE_VM 0x00000100 /* set if VM shared between processes */ |
| 9 | #define CLONE_FS 0x00000200 /* set if fs info shared between processes */ |
| 10 | #define CLONE_FILES 0x00000400 /* set if open files shared between processes */ |
| 11 | #define CLONE_SIGHAND 0x00000800 /* set if signal handlers and blocked signals shared */ |
| 12 | #define CLONE_PTRACE 0x00002000 /* set if we want to let tracing continue on the child too */ |
| 13 | #define CLONE_VFORK 0x00004000 /* set if the parent wants the child to wake it up on mm_release */ |
| 14 | #define CLONE_PARENT 0x00008000 /* set if we want to have the same parent as the cloner */ |
| 15 | #define CLONE_THREAD 0x00010000 /* Same thread group? */ |
| 16 | #define CLONE_NEWNS 0x00020000 /* New namespace group? */ |
| 17 | #define CLONE_SYSVSEM 0x00040000 /* share system V SEM_UNDO semantics */ |
| 18 | #define CLONE_SETTLS 0x00080000 /* create a new TLS for the child */ |
| 19 | #define CLONE_PARENT_SETTID 0x00100000 /* set the TID in the parent */ |
| 20 | #define CLONE_CHILD_CLEARTID 0x00200000 /* clear the TID in the child */ |
| 21 | #define CLONE_DETACHED 0x00400000 /* Unused, ignored */ |
| 22 | #define CLONE_UNTRACED 0x00800000 /* set if the tracing process can't force CLONE_PTRACE on this clone */ |
| 23 | #define CLONE_CHILD_SETTID 0x01000000 /* set the TID in the child */ |
| 24 | #define CLONE_STOPPED 0x02000000 /* Start in stopped state */ |
| 25 | #define CLONE_NEWUTS 0x04000000 /* New utsname group? */ |
| 26 | #define CLONE_NEWIPC 0x08000000 /* New ipcs */ |
| 27 | #define CLONE_NEWUSER 0x10000000 /* New user namespace */ |
| 28 | #define CLONE_NEWPID 0x20000000 /* New pid namespace */ |
| 29 | #define CLONE_NEWNET 0x40000000 /* New network namespace */ |
| 30 | #define CLONE_IO 0x80000000 /* Clone io context */ |
| 31 | |
| 32 | /* |
| 33 | * Scheduling policies |
| 34 | */ |
| 35 | #define SCHED_NORMAL 0 |
| 36 | #define SCHED_FIFO 1 |
| 37 | #define SCHED_RR 2 |
| 38 | #define SCHED_BATCH 3 |
| 39 | /* SCHED_ISO: reserved but not implemented yet */ |
| 40 | #define SCHED_IDLE 5 |
| 41 | /* Can be ORed in to make sure the process is reverted back to SCHED_NORMAL on fork */ |
| 42 | #define SCHED_RESET_ON_FORK 0x40000000 |
| 43 | |
| 44 | #ifdef __KERNEL__ |
| 45 | |
| 46 | struct sched_param { |
| 47 | int sched_priority; |
| 48 | }; |
| 49 | |
| 50 | #include <asm/param.h> /* for HZ */ |
| 51 | |
| 52 | #include <linux/capability.h> |
| 53 | #include <linux/threads.h> |
| 54 | #include <linux/kernel.h> |
| 55 | #include <linux/types.h> |
| 56 | #include <linux/timex.h> |
| 57 | #include <linux/jiffies.h> |
| 58 | #include <linux/rbtree.h> |
| 59 | #include <linux/thread_info.h> |
| 60 | #include <linux/cpumask.h> |
| 61 | #include <linux/errno.h> |
| 62 | #include <linux/nodemask.h> |
| 63 | #include <linux/mm_types.h> |
| 64 | |
| 65 | #include <asm/system.h> |
| 66 | #include <asm/page.h> |
| 67 | #include <asm/ptrace.h> |
| 68 | #include <asm/cputime.h> |
| 69 | |
| 70 | #include <linux/smp.h> |
| 71 | #include <linux/sem.h> |
| 72 | #include <linux/signal.h> |
| 73 | #include <linux/path.h> |
| 74 | #include <linux/compiler.h> |
| 75 | #include <linux/completion.h> |
| 76 | #include <linux/pid.h> |
| 77 | #include <linux/percpu.h> |
| 78 | #include <linux/topology.h> |
| 79 | #include <linux/proportions.h> |
| 80 | #include <linux/seccomp.h> |
| 81 | #include <linux/rcupdate.h> |
| 82 | #include <linux/rculist.h> |
| 83 | #include <linux/rtmutex.h> |
| 84 | |
| 85 | #include <linux/time.h> |
| 86 | #include <linux/param.h> |
| 87 | #include <linux/resource.h> |
| 88 | #include <linux/timer.h> |
| 89 | #include <linux/hrtimer.h> |
| 90 | #include <linux/task_io_accounting.h> |
| 91 | #include <linux/kobject.h> |
| 92 | #include <linux/latencytop.h> |
| 93 | #include <linux/cred.h> |
| 94 | |
| 95 | #include <asm/processor.h> |
| 96 | |
| 97 | struct exec_domain; |
| 98 | struct futex_pi_state; |
| 99 | struct robust_list_head; |
| 100 | struct bio_list; |
| 101 | struct fs_struct; |
| 102 | struct bts_context; |
| 103 | struct perf_event_context; |
| 104 | |
| 105 | /* |
| 106 | * List of flags we want to share for kernel threads, |
| 107 | * if only because they are not used by them anyway. |
| 108 | */ |
| 109 | #define CLONE_KERNEL (CLONE_FS | CLONE_FILES | CLONE_SIGHAND) |
| 110 | |
| 111 | /* |
| 112 | * These are the constant used to fake the fixed-point load-average |
| 113 | * counting. Some notes: |
| 114 | * - 11 bit fractions expand to 22 bits by the multiplies: this gives |
| 115 | * a load-average precision of 10 bits integer + 11 bits fractional |
| 116 | * - if you want to count load-averages more often, you need more |
| 117 | * precision, or rounding will get you. With 2-second counting freq, |
| 118 | * the EXP_n values would be 1981, 2034 and 2043 if still using only |
| 119 | * 11 bit fractions. |
| 120 | */ |
| 121 | extern unsigned long avenrun[]; /* Load averages */ |
| 122 | extern void get_avenrun(unsigned long *loads, unsigned long offset, int shift); |
| 123 | |
| 124 | #define FSHIFT 11 /* nr of bits of precision */ |
| 125 | #define FIXED_1 (1<<FSHIFT) /* 1.0 as fixed-point */ |
| 126 | #define LOAD_FREQ (5*HZ+1) /* 5 sec intervals */ |
| 127 | #define EXP_1 1884 /* 1/exp(5sec/1min) as fixed-point */ |
| 128 | #define EXP_5 2014 /* 1/exp(5sec/5min) */ |
| 129 | #define EXP_15 2037 /* 1/exp(5sec/15min) */ |
| 130 | |
| 131 | #define CALC_LOAD(load,exp,n) \ |
| 132 | load *= exp; \ |
| 133 | load += n*(FIXED_1-exp); \ |
| 134 | load >>= FSHIFT; |
| 135 | |
| 136 | extern unsigned long total_forks; |
| 137 | extern int nr_threads; |
| 138 | DECLARE_PER_CPU(unsigned long, process_counts); |
| 139 | extern int nr_processes(void); |
| 140 | extern unsigned long nr_running(void); |
| 141 | extern unsigned long nr_uninterruptible(void); |
| 142 | extern unsigned long nr_iowait(void); |
| 143 | extern unsigned long nr_iowait_cpu(void); |
| 144 | extern unsigned long this_cpu_load(void); |
| 145 | |
| 146 | |
| 147 | extern void calc_global_load(void); |
| 148 | |
| 149 | extern unsigned long get_parent_ip(unsigned long addr); |
| 150 | |
| 151 | struct seq_file; |
| 152 | struct cfs_rq; |
| 153 | struct task_group; |
| 154 | #ifdef CONFIG_SCHED_DEBUG |
| 155 | extern void proc_sched_show_task(struct task_struct *p, struct seq_file *m); |
| 156 | extern void proc_sched_set_task(struct task_struct *p); |
| 157 | extern void |
| 158 | print_cfs_rq(struct seq_file *m, int cpu, struct cfs_rq *cfs_rq); |
| 159 | #else |
| 160 | static inline void |
| 161 | proc_sched_show_task(struct task_struct *p, struct seq_file *m) |
| 162 | { |
| 163 | } |
| 164 | static inline void proc_sched_set_task(struct task_struct *p) |
| 165 | { |
| 166 | } |
| 167 | static inline void |
| 168 | print_cfs_rq(struct seq_file *m, int cpu, struct cfs_rq *cfs_rq) |
| 169 | { |
| 170 | } |
| 171 | #endif |
| 172 | |
| 173 | /* |
| 174 | * Task state bitmask. NOTE! These bits are also |
| 175 | * encoded in fs/proc/array.c: get_task_state(). |
| 176 | * |
| 177 | * We have two separate sets of flags: task->state |
| 178 | * is about runnability, while task->exit_state are |
| 179 | * about the task exiting. Confusing, but this way |
| 180 | * modifying one set can't modify the other one by |
| 181 | * mistake. |
| 182 | */ |
| 183 | #define TASK_RUNNING 0 |
| 184 | #define TASK_INTERRUPTIBLE 1 |
| 185 | #define TASK_UNINTERRUPTIBLE 2 |
| 186 | #define __TASK_STOPPED 4 |
| 187 | #define __TASK_TRACED 8 |
| 188 | /* in tsk->exit_state */ |
| 189 | #define EXIT_ZOMBIE 16 |
| 190 | #define EXIT_DEAD 32 |
| 191 | /* in tsk->state again */ |
| 192 | #define TASK_DEAD 64 |
| 193 | #define TASK_WAKEKILL 128 |
| 194 | #define TASK_WAKING 256 |
| 195 | #define TASK_STATE_MAX 512 |
| 196 | |
| 197 | #define TASK_STATE_TO_CHAR_STR "RSDTtZXxKW" |
| 198 | |
| 199 | extern char ___assert_task_state[1 - 2*!!( |
| 200 | sizeof(TASK_STATE_TO_CHAR_STR)-1 != ilog2(TASK_STATE_MAX)+1)]; |
| 201 | |
| 202 | /* Convenience macros for the sake of set_task_state */ |
| 203 | #define TASK_KILLABLE (TASK_WAKEKILL | TASK_UNINTERRUPTIBLE) |
| 204 | #define TASK_STOPPED (TASK_WAKEKILL | __TASK_STOPPED) |
| 205 | #define TASK_TRACED (TASK_WAKEKILL | __TASK_TRACED) |
| 206 | |
| 207 | /* Convenience macros for the sake of wake_up */ |
| 208 | #define TASK_NORMAL (TASK_INTERRUPTIBLE | TASK_UNINTERRUPTIBLE) |
| 209 | #define TASK_ALL (TASK_NORMAL | __TASK_STOPPED | __TASK_TRACED) |
| 210 | |
| 211 | /* get_task_state() */ |
| 212 | #define TASK_REPORT (TASK_RUNNING | TASK_INTERRUPTIBLE | \ |
| 213 | TASK_UNINTERRUPTIBLE | __TASK_STOPPED | \ |
| 214 | __TASK_TRACED) |
| 215 | |
| 216 | #define task_is_traced(task) ((task->state & __TASK_TRACED) != 0) |
| 217 | #define task_is_stopped(task) ((task->state & __TASK_STOPPED) != 0) |
| 218 | #define task_is_stopped_or_traced(task) \ |
| 219 | ((task->state & (__TASK_STOPPED | __TASK_TRACED)) != 0) |
| 220 | #define task_contributes_to_load(task) \ |
| 221 | ((task->state & TASK_UNINTERRUPTIBLE) != 0 && \ |
| 222 | (task->flags & PF_FREEZING) == 0) |
| 223 | |
| 224 | #define __set_task_state(tsk, state_value) \ |
| 225 | do { (tsk)->state = (state_value); } while (0) |
| 226 | #define set_task_state(tsk, state_value) \ |
| 227 | set_mb((tsk)->state, (state_value)) |
| 228 | |
| 229 | /* |
| 230 | * set_current_state() includes a barrier so that the write of current->state |
| 231 | * is correctly serialised wrt the caller's subsequent test of whether to |
| 232 | * actually sleep: |
| 233 | * |
| 234 | * set_current_state(TASK_UNINTERRUPTIBLE); |
| 235 | * if (do_i_need_to_sleep()) |
| 236 | * schedule(); |
| 237 | * |
| 238 | * If the caller does not need such serialisation then use __set_current_state() |
| 239 | */ |
| 240 | #define __set_current_state(state_value) \ |
| 241 | do { current->state = (state_value); } while (0) |
| 242 | #define set_current_state(state_value) \ |
| 243 | set_mb(current->state, (state_value)) |
| 244 | |
| 245 | /* Task command name length */ |
| 246 | #define TASK_COMM_LEN 16 |
| 247 | |
| 248 | #include <linux/spinlock.h> |
| 249 | |
| 250 | /* |
| 251 | * This serializes "schedule()" and also protects |
| 252 | * the run-queue from deletions/modifications (but |
| 253 | * _adding_ to the beginning of the run-queue has |
| 254 | * a separate lock). |
| 255 | */ |
| 256 | extern rwlock_t tasklist_lock; |
| 257 | extern spinlock_t mmlist_lock; |
| 258 | |
| 259 | struct task_struct; |
| 260 | |
| 261 | #ifdef CONFIG_PROVE_RCU |
| 262 | extern int lockdep_tasklist_lock_is_held(void); |
| 263 | #endif /* #ifdef CONFIG_PROVE_RCU */ |
| 264 | |
| 265 | extern void sched_init(void); |
| 266 | extern void sched_init_smp(void); |
| 267 | extern asmlinkage void schedule_tail(struct task_struct *prev); |
| 268 | extern void init_idle(struct task_struct *idle, int cpu); |
| 269 | extern void init_idle_bootup_task(struct task_struct *idle); |
| 270 | |
| 271 | extern int runqueue_is_locked(int cpu); |
| 272 | extern void task_rq_unlock_wait(struct task_struct *p); |
| 273 | |
| 274 | extern cpumask_var_t nohz_cpu_mask; |
| 275 | #if defined(CONFIG_SMP) && defined(CONFIG_NO_HZ) |
| 276 | extern int select_nohz_load_balancer(int cpu); |
| 277 | extern int get_nohz_load_balancer(void); |
| 278 | #else |
| 279 | static inline int select_nohz_load_balancer(int cpu) |
| 280 | { |
| 281 | return 0; |
| 282 | } |
| 283 | #endif |
| 284 | |
| 285 | /* |
| 286 | * Only dump TASK_* tasks. (0 for all tasks) |
| 287 | */ |
| 288 | extern void show_state_filter(unsigned long state_filter); |
| 289 | |
| 290 | static inline void show_state(void) |
| 291 | { |
| 292 | show_state_filter(0); |
| 293 | } |
| 294 | |
| 295 | extern void show_regs(struct pt_regs *); |
| 296 | |
| 297 | /* |
| 298 | * TASK is a pointer to the task whose backtrace we want to see (or NULL for current |
| 299 | * task), SP is the stack pointer of the first frame that should be shown in the back |
| 300 | * trace (or NULL if the entire call-chain of the task should be shown). |
| 301 | */ |
| 302 | extern void show_stack(struct task_struct *task, unsigned long *sp); |
| 303 | |
| 304 | void io_schedule(void); |
| 305 | long io_schedule_timeout(long timeout); |
| 306 | |
| 307 | extern void cpu_init (void); |
| 308 | extern void trap_init(void); |
| 309 | extern void update_process_times(int user); |
| 310 | extern void scheduler_tick(void); |
| 311 | |
| 312 | extern void sched_show_task(struct task_struct *p); |
| 313 | |
| 314 | #ifdef CONFIG_DETECT_SOFTLOCKUP |
| 315 | extern void softlockup_tick(void); |
| 316 | extern void touch_softlockup_watchdog(void); |
| 317 | extern void touch_softlockup_watchdog_sync(void); |
| 318 | extern void touch_all_softlockup_watchdogs(void); |
| 319 | extern int proc_dosoftlockup_thresh(struct ctl_table *table, int write, |
| 320 | void __user *buffer, |
| 321 | size_t *lenp, loff_t *ppos); |
| 322 | extern unsigned int softlockup_panic; |
| 323 | extern int softlockup_thresh; |
| 324 | #else |
| 325 | static inline void softlockup_tick(void) |
| 326 | { |
| 327 | } |
| 328 | static inline void touch_softlockup_watchdog(void) |
| 329 | { |
| 330 | } |
| 331 | static inline void touch_softlockup_watchdog_sync(void) |
| 332 | { |
| 333 | } |
| 334 | static inline void touch_all_softlockup_watchdogs(void) |
| 335 | { |
| 336 | } |
| 337 | #endif |
| 338 | |
| 339 | #ifdef CONFIG_DETECT_HUNG_TASK |
| 340 | extern unsigned int sysctl_hung_task_panic; |
| 341 | extern unsigned long sysctl_hung_task_check_count; |
| 342 | extern unsigned long sysctl_hung_task_timeout_secs; |
| 343 | extern unsigned long sysctl_hung_task_warnings; |
| 344 | extern int proc_dohung_task_timeout_secs(struct ctl_table *table, int write, |
| 345 | void __user *buffer, |
| 346 | size_t *lenp, loff_t *ppos); |
| 347 | #endif |
| 348 | |
| 349 | /* Attach to any functions which should be ignored in wchan output. */ |
| 350 | #define __sched __attribute__((__section__(".sched.text"))) |
| 351 | |
| 352 | /* Linker adds these: start and end of __sched functions */ |
| 353 | extern char __sched_text_start[], __sched_text_end[]; |
| 354 | |
| 355 | /* Is this address in the __sched functions? */ |
| 356 | extern int in_sched_functions(unsigned long addr); |
| 357 | |
| 358 | #define MAX_SCHEDULE_TIMEOUT LONG_MAX |
| 359 | extern signed long schedule_timeout(signed long timeout); |
| 360 | extern signed long schedule_timeout_interruptible(signed long timeout); |
| 361 | extern signed long schedule_timeout_killable(signed long timeout); |
| 362 | extern signed long schedule_timeout_uninterruptible(signed long timeout); |
| 363 | asmlinkage void schedule(void); |
| 364 | extern int mutex_spin_on_owner(struct mutex *lock, struct thread_info *owner); |
| 365 | |
| 366 | struct nsproxy; |
| 367 | struct user_namespace; |
| 368 | |
| 369 | /* |
| 370 | * Default maximum number of active map areas, this limits the number of vmas |
| 371 | * per mm struct. Users can overwrite this number by sysctl but there is a |
| 372 | * problem. |
| 373 | * |
| 374 | * When a program's coredump is generated as ELF format, a section is created |
| 375 | * per a vma. In ELF, the number of sections is represented in unsigned short. |
| 376 | * This means the number of sections should be smaller than 65535 at coredump. |
| 377 | * Because the kernel adds some informative sections to a image of program at |
| 378 | * generating coredump, we need some margin. The number of extra sections is |
| 379 | * 1-3 now and depends on arch. We use "5" as safe margin, here. |
| 380 | */ |
| 381 | #define MAPCOUNT_ELF_CORE_MARGIN (5) |
| 382 | #define DEFAULT_MAX_MAP_COUNT (USHORT_MAX - MAPCOUNT_ELF_CORE_MARGIN) |
| 383 | |
| 384 | extern int sysctl_max_map_count; |
| 385 | |
| 386 | #include <linux/aio.h> |
| 387 | |
| 388 | #ifdef CONFIG_MMU |
| 389 | extern void arch_pick_mmap_layout(struct mm_struct *mm); |
| 390 | extern unsigned long |
| 391 | arch_get_unmapped_area(struct file *, unsigned long, unsigned long, |
| 392 | unsigned long, unsigned long); |
| 393 | extern unsigned long |
| 394 | arch_get_unmapped_area_topdown(struct file *filp, unsigned long addr, |
| 395 | unsigned long len, unsigned long pgoff, |
| 396 | unsigned long flags); |
| 397 | extern void arch_unmap_area(struct mm_struct *, unsigned long); |
| 398 | extern void arch_unmap_area_topdown(struct mm_struct *, unsigned long); |
| 399 | #else |
| 400 | static inline void arch_pick_mmap_layout(struct mm_struct *mm) {} |
| 401 | #endif |
| 402 | |
| 403 | |
| 404 | extern void set_dumpable(struct mm_struct *mm, int value); |
| 405 | extern int get_dumpable(struct mm_struct *mm); |
| 406 | |
| 407 | /* mm flags */ |
| 408 | /* dumpable bits */ |
| 409 | #define MMF_DUMPABLE 0 /* core dump is permitted */ |
| 410 | #define MMF_DUMP_SECURELY 1 /* core file is readable only by root */ |
| 411 | |
| 412 | #define MMF_DUMPABLE_BITS 2 |
| 413 | #define MMF_DUMPABLE_MASK ((1 << MMF_DUMPABLE_BITS) - 1) |
| 414 | |
| 415 | /* coredump filter bits */ |
| 416 | #define MMF_DUMP_ANON_PRIVATE 2 |
| 417 | #define MMF_DUMP_ANON_SHARED 3 |
| 418 | #define MMF_DUMP_MAPPED_PRIVATE 4 |
| 419 | #define MMF_DUMP_MAPPED_SHARED 5 |
| 420 | #define MMF_DUMP_ELF_HEADERS 6 |
| 421 | #define MMF_DUMP_HUGETLB_PRIVATE 7 |
| 422 | #define MMF_DUMP_HUGETLB_SHARED 8 |
| 423 | |
| 424 | #define MMF_DUMP_FILTER_SHIFT MMF_DUMPABLE_BITS |
| 425 | #define MMF_DUMP_FILTER_BITS 7 |
| 426 | #define MMF_DUMP_FILTER_MASK \ |
| 427 | (((1 << MMF_DUMP_FILTER_BITS) - 1) << MMF_DUMP_FILTER_SHIFT) |
| 428 | #define MMF_DUMP_FILTER_DEFAULT \ |
| 429 | ((1 << MMF_DUMP_ANON_PRIVATE) | (1 << MMF_DUMP_ANON_SHARED) |\ |
| 430 | (1 << MMF_DUMP_HUGETLB_PRIVATE) | MMF_DUMP_MASK_DEFAULT_ELF) |
| 431 | |
| 432 | #ifdef CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS |
| 433 | # define MMF_DUMP_MASK_DEFAULT_ELF (1 << MMF_DUMP_ELF_HEADERS) |
| 434 | #else |
| 435 | # define MMF_DUMP_MASK_DEFAULT_ELF 0 |
| 436 | #endif |
| 437 | /* leave room for more dump flags */ |
| 438 | #define MMF_VM_MERGEABLE 16 /* KSM may merge identical pages */ |
| 439 | |
| 440 | #define MMF_INIT_MASK (MMF_DUMPABLE_MASK | MMF_DUMP_FILTER_MASK) |
| 441 | |
| 442 | struct sighand_struct { |
| 443 | atomic_t count; |
| 444 | struct k_sigaction action[_NSIG]; |
| 445 | spinlock_t siglock; |
| 446 | wait_queue_head_t signalfd_wqh; |
| 447 | }; |
| 448 | |
| 449 | struct pacct_struct { |
| 450 | int ac_flag; |
| 451 | long ac_exitcode; |
| 452 | unsigned long ac_mem; |
| 453 | cputime_t ac_utime, ac_stime; |
| 454 | unsigned long ac_minflt, ac_majflt; |
| 455 | }; |
| 456 | |
| 457 | struct cpu_itimer { |
| 458 | cputime_t expires; |
| 459 | cputime_t incr; |
| 460 | u32 error; |
| 461 | u32 incr_error; |
| 462 | }; |
| 463 | |
| 464 | /** |
| 465 | * struct task_cputime - collected CPU time counts |
| 466 | * @utime: time spent in user mode, in &cputime_t units |
| 467 | * @stime: time spent in kernel mode, in &cputime_t units |
| 468 | * @sum_exec_runtime: total time spent on the CPU, in nanoseconds |
| 469 | * |
| 470 | * This structure groups together three kinds of CPU time that are |
| 471 | * tracked for threads and thread groups. Most things considering |
| 472 | * CPU time want to group these counts together and treat all three |
| 473 | * of them in parallel. |
| 474 | */ |
| 475 | struct task_cputime { |
| 476 | cputime_t utime; |
| 477 | cputime_t stime; |
| 478 | unsigned long long sum_exec_runtime; |
| 479 | }; |
| 480 | /* Alternate field names when used to cache expirations. */ |
| 481 | #define prof_exp stime |
| 482 | #define virt_exp utime |
| 483 | #define sched_exp sum_exec_runtime |
| 484 | |
| 485 | #define INIT_CPUTIME \ |
| 486 | (struct task_cputime) { \ |
| 487 | .utime = cputime_zero, \ |
| 488 | .stime = cputime_zero, \ |
| 489 | .sum_exec_runtime = 0, \ |
| 490 | } |
| 491 | |
| 492 | /* |
| 493 | * Disable preemption until the scheduler is running. |
| 494 | * Reset by start_kernel()->sched_init()->init_idle(). |
| 495 | * |
| 496 | * We include PREEMPT_ACTIVE to avoid cond_resched() from working |
| 497 | * before the scheduler is active -- see should_resched(). |
| 498 | */ |
| 499 | #define INIT_PREEMPT_COUNT (1 + PREEMPT_ACTIVE) |
| 500 | |
| 501 | /** |
| 502 | * struct thread_group_cputimer - thread group interval timer counts |
| 503 | * @cputime: thread group interval timers. |
| 504 | * @running: non-zero when there are timers running and |
| 505 | * @cputime receives updates. |
| 506 | * @lock: lock for fields in this struct. |
| 507 | * |
| 508 | * This structure contains the version of task_cputime, above, that is |
| 509 | * used for thread group CPU timer calculations. |
| 510 | */ |
| 511 | struct thread_group_cputimer { |
| 512 | struct task_cputime cputime; |
| 513 | int running; |
| 514 | spinlock_t lock; |
| 515 | }; |
| 516 | |
| 517 | /* |
| 518 | * NOTE! "signal_struct" does not have it's own |
| 519 | * locking, because a shared signal_struct always |
| 520 | * implies a shared sighand_struct, so locking |
| 521 | * sighand_struct is always a proper superset of |
| 522 | * the locking of signal_struct. |
| 523 | */ |
| 524 | struct signal_struct { |
| 525 | atomic_t count; |
| 526 | atomic_t live; |
| 527 | |
| 528 | wait_queue_head_t wait_chldexit; /* for wait4() */ |
| 529 | |
| 530 | /* current thread group signal load-balancing target: */ |
| 531 | struct task_struct *curr_target; |
| 532 | |
| 533 | /* shared signal handling: */ |
| 534 | struct sigpending shared_pending; |
| 535 | |
| 536 | /* thread group exit support */ |
| 537 | int group_exit_code; |
| 538 | /* overloaded: |
| 539 | * - notify group_exit_task when ->count is equal to notify_count |
| 540 | * - everyone except group_exit_task is stopped during signal delivery |
| 541 | * of fatal signals, group_exit_task processes the signal. |
| 542 | */ |
| 543 | int notify_count; |
| 544 | struct task_struct *group_exit_task; |
| 545 | |
| 546 | /* thread group stop support, overloads group_exit_code too */ |
| 547 | int group_stop_count; |
| 548 | unsigned int flags; /* see SIGNAL_* flags below */ |
| 549 | |
| 550 | /* POSIX.1b Interval Timers */ |
| 551 | struct list_head posix_timers; |
| 552 | |
| 553 | /* ITIMER_REAL timer for the process */ |
| 554 | struct hrtimer real_timer; |
| 555 | struct pid *leader_pid; |
| 556 | ktime_t it_real_incr; |
| 557 | |
| 558 | /* |
| 559 | * ITIMER_PROF and ITIMER_VIRTUAL timers for the process, we use |
| 560 | * CPUCLOCK_PROF and CPUCLOCK_VIRT for indexing array as these |
| 561 | * values are defined to 0 and 1 respectively |
| 562 | */ |
| 563 | struct cpu_itimer it[2]; |
| 564 | |
| 565 | /* |
| 566 | * Thread group totals for process CPU timers. |
| 567 | * See thread_group_cputimer(), et al, for details. |
| 568 | */ |
| 569 | struct thread_group_cputimer cputimer; |
| 570 | |
| 571 | /* Earliest-expiration cache. */ |
| 572 | struct task_cputime cputime_expires; |
| 573 | |
| 574 | struct list_head cpu_timers[3]; |
| 575 | |
| 576 | struct pid *tty_old_pgrp; |
| 577 | |
| 578 | /* boolean value for session group leader */ |
| 579 | int leader; |
| 580 | |
| 581 | struct tty_struct *tty; /* NULL if no tty */ |
| 582 | |
| 583 | /* |
| 584 | * Cumulative resource counters for dead threads in the group, |
| 585 | * and for reaped dead child processes forked by this group. |
| 586 | * Live threads maintain their own counters and add to these |
| 587 | * in __exit_signal, except for the group leader. |
| 588 | */ |
| 589 | cputime_t utime, stime, cutime, cstime; |
| 590 | cputime_t gtime; |
| 591 | cputime_t cgtime; |
| 592 | #ifndef CONFIG_VIRT_CPU_ACCOUNTING |
| 593 | cputime_t prev_utime, prev_stime; |
| 594 | #endif |
| 595 | unsigned long nvcsw, nivcsw, cnvcsw, cnivcsw; |
| 596 | unsigned long min_flt, maj_flt, cmin_flt, cmaj_flt; |
| 597 | unsigned long inblock, oublock, cinblock, coublock; |
| 598 | unsigned long maxrss, cmaxrss; |
| 599 | struct task_io_accounting ioac; |
| 600 | |
| 601 | /* |
| 602 | * Cumulative ns of schedule CPU time fo dead threads in the |
| 603 | * group, not including a zombie group leader, (This only differs |
| 604 | * from jiffies_to_ns(utime + stime) if sched_clock uses something |
| 605 | * other than jiffies.) |
| 606 | */ |
| 607 | unsigned long long sum_sched_runtime; |
| 608 | |
| 609 | /* |
| 610 | * We don't bother to synchronize most readers of this at all, |
| 611 | * because there is no reader checking a limit that actually needs |
| 612 | * to get both rlim_cur and rlim_max atomically, and either one |
| 613 | * alone is a single word that can safely be read normally. |
| 614 | * getrlimit/setrlimit use task_lock(current->group_leader) to |
| 615 | * protect this instead of the siglock, because they really |
| 616 | * have no need to disable irqs. |
| 617 | */ |
| 618 | struct rlimit rlim[RLIM_NLIMITS]; |
| 619 | |
| 620 | #ifdef CONFIG_BSD_PROCESS_ACCT |
| 621 | struct pacct_struct pacct; /* per-process accounting information */ |
| 622 | #endif |
| 623 | #ifdef CONFIG_TASKSTATS |
| 624 | struct taskstats *stats; |
| 625 | #endif |
| 626 | #ifdef CONFIG_AUDIT |
| 627 | unsigned audit_tty; |
| 628 | struct tty_audit_buf *tty_audit_buf; |
| 629 | #endif |
| 630 | |
| 631 | int oom_adj; /* OOM kill score adjustment (bit shift) */ |
| 632 | }; |
| 633 | |
| 634 | /* Context switch must be unlocked if interrupts are to be enabled */ |
| 635 | #ifdef __ARCH_WANT_INTERRUPTS_ON_CTXSW |
| 636 | # define __ARCH_WANT_UNLOCKED_CTXSW |
| 637 | #endif |
| 638 | |
| 639 | /* |
| 640 | * Bits in flags field of signal_struct. |
| 641 | */ |
| 642 | #define SIGNAL_STOP_STOPPED 0x00000001 /* job control stop in effect */ |
| 643 | #define SIGNAL_STOP_DEQUEUED 0x00000002 /* stop signal dequeued */ |
| 644 | #define SIGNAL_STOP_CONTINUED 0x00000004 /* SIGCONT since WCONTINUED reap */ |
| 645 | #define SIGNAL_GROUP_EXIT 0x00000008 /* group exit in progress */ |
| 646 | /* |
| 647 | * Pending notifications to parent. |
| 648 | */ |
| 649 | #define SIGNAL_CLD_STOPPED 0x00000010 |
| 650 | #define SIGNAL_CLD_CONTINUED 0x00000020 |
| 651 | #define SIGNAL_CLD_MASK (SIGNAL_CLD_STOPPED|SIGNAL_CLD_CONTINUED) |
| 652 | |
| 653 | #define SIGNAL_UNKILLABLE 0x00000040 /* for init: ignore fatal signals */ |
| 654 | |
| 655 | /* If true, all threads except ->group_exit_task have pending SIGKILL */ |
| 656 | static inline int signal_group_exit(const struct signal_struct *sig) |
| 657 | { |
| 658 | return (sig->flags & SIGNAL_GROUP_EXIT) || |
| 659 | (sig->group_exit_task != NULL); |
| 660 | } |
| 661 | |
| 662 | /* |
| 663 | * Some day this will be a full-fledged user tracking system.. |
| 664 | */ |
| 665 | struct user_struct { |
| 666 | atomic_t __count; /* reference count */ |
| 667 | atomic_t processes; /* How many processes does this user have? */ |
| 668 | atomic_t files; /* How many open files does this user have? */ |
| 669 | atomic_t sigpending; /* How many pending signals does this user have? */ |
| 670 | #ifdef CONFIG_INOTIFY_USER |
| 671 | atomic_t inotify_watches; /* How many inotify watches does this user have? */ |
| 672 | atomic_t inotify_devs; /* How many inotify devs does this user have opened? */ |
| 673 | #endif |
| 674 | #ifdef CONFIG_EPOLL |
| 675 | atomic_t epoll_watches; /* The number of file descriptors currently watched */ |
| 676 | #endif |
| 677 | #ifdef CONFIG_POSIX_MQUEUE |
| 678 | /* protected by mq_lock */ |
| 679 | unsigned long mq_bytes; /* How many bytes can be allocated to mqueue? */ |
| 680 | #endif |
| 681 | unsigned long locked_shm; /* How many pages of mlocked shm ? */ |
| 682 | |
| 683 | #ifdef CONFIG_KEYS |
| 684 | struct key *uid_keyring; /* UID specific keyring */ |
| 685 | struct key *session_keyring; /* UID's default session keyring */ |
| 686 | #endif |
| 687 | |
| 688 | /* Hash table maintenance information */ |
| 689 | struct hlist_node uidhash_node; |
| 690 | uid_t uid; |
| 691 | struct user_namespace *user_ns; |
| 692 | |
| 693 | #ifdef CONFIG_PERF_EVENTS |
| 694 | atomic_long_t locked_vm; |
| 695 | #endif |
| 696 | }; |
| 697 | |
| 698 | extern int uids_sysfs_init(void); |
| 699 | |
| 700 | extern struct user_struct *find_user(uid_t); |
| 701 | |
| 702 | extern struct user_struct root_user; |
| 703 | #define INIT_USER (&root_user) |
| 704 | |
| 705 | |
| 706 | struct backing_dev_info; |
| 707 | struct reclaim_state; |
| 708 | |
| 709 | #if defined(CONFIG_SCHEDSTATS) || defined(CONFIG_TASK_DELAY_ACCT) |
| 710 | struct sched_info { |
| 711 | /* cumulative counters */ |
| 712 | unsigned long pcount; /* # of times run on this cpu */ |
| 713 | unsigned long long run_delay; /* time spent waiting on a runqueue */ |
| 714 | |
| 715 | /* timestamps */ |
| 716 | unsigned long long last_arrival,/* when we last ran on a cpu */ |
| 717 | last_queued; /* when we were last queued to run */ |
| 718 | #ifdef CONFIG_SCHEDSTATS |
| 719 | /* BKL stats */ |
| 720 | unsigned int bkl_count; |
| 721 | #endif |
| 722 | }; |
| 723 | #endif /* defined(CONFIG_SCHEDSTATS) || defined(CONFIG_TASK_DELAY_ACCT) */ |
| 724 | |
| 725 | #ifdef CONFIG_TASK_DELAY_ACCT |
| 726 | struct task_delay_info { |
| 727 | spinlock_t lock; |
| 728 | unsigned int flags; /* Private per-task flags */ |
| 729 | |
| 730 | /* For each stat XXX, add following, aligned appropriately |
| 731 | * |
| 732 | * struct timespec XXX_start, XXX_end; |
| 733 | * u64 XXX_delay; |
| 734 | * u32 XXX_count; |
| 735 | * |
| 736 | * Atomicity of updates to XXX_delay, XXX_count protected by |
| 737 | * single lock above (split into XXX_lock if contention is an issue). |
| 738 | */ |
| 739 | |
| 740 | /* |
| 741 | * XXX_count is incremented on every XXX operation, the delay |
| 742 | * associated with the operation is added to XXX_delay. |
| 743 | * XXX_delay contains the accumulated delay time in nanoseconds. |
| 744 | */ |
| 745 | struct timespec blkio_start, blkio_end; /* Shared by blkio, swapin */ |
| 746 | u64 blkio_delay; /* wait for sync block io completion */ |
| 747 | u64 swapin_delay; /* wait for swapin block io completion */ |
| 748 | u32 blkio_count; /* total count of the number of sync block */ |
| 749 | /* io operations performed */ |
| 750 | u32 swapin_count; /* total count of the number of swapin block */ |
| 751 | /* io operations performed */ |
| 752 | |
| 753 | struct timespec freepages_start, freepages_end; |
| 754 | u64 freepages_delay; /* wait for memory reclaim */ |
| 755 | u32 freepages_count; /* total count of memory reclaim */ |
| 756 | }; |
| 757 | #endif /* CONFIG_TASK_DELAY_ACCT */ |
| 758 | |
| 759 | static inline int sched_info_on(void) |
| 760 | { |
| 761 | #ifdef CONFIG_SCHEDSTATS |
| 762 | return 1; |
| 763 | #elif defined(CONFIG_TASK_DELAY_ACCT) |
| 764 | extern int delayacct_on; |
| 765 | return delayacct_on; |
| 766 | #else |
| 767 | return 0; |
| 768 | #endif |
| 769 | } |
| 770 | |
| 771 | enum cpu_idle_type { |
| 772 | CPU_IDLE, |
| 773 | CPU_NOT_IDLE, |
| 774 | CPU_NEWLY_IDLE, |
| 775 | CPU_MAX_IDLE_TYPES |
| 776 | }; |
| 777 | |
| 778 | /* |
| 779 | * sched-domains (multiprocessor balancing) declarations: |
| 780 | */ |
| 781 | |
| 782 | /* |
| 783 | * Increase resolution of nice-level calculations: |
| 784 | */ |
| 785 | #define SCHED_LOAD_SHIFT 10 |
| 786 | #define SCHED_LOAD_SCALE (1L << SCHED_LOAD_SHIFT) |
| 787 | |
| 788 | #define SCHED_LOAD_SCALE_FUZZ SCHED_LOAD_SCALE |
| 789 | |
| 790 | #ifdef CONFIG_SMP |
| 791 | #define SD_LOAD_BALANCE 0x0001 /* Do load balancing on this domain. */ |
| 792 | #define SD_BALANCE_NEWIDLE 0x0002 /* Balance when about to become idle */ |
| 793 | #define SD_BALANCE_EXEC 0x0004 /* Balance on exec */ |
| 794 | #define SD_BALANCE_FORK 0x0008 /* Balance on fork, clone */ |
| 795 | #define SD_BALANCE_WAKE 0x0010 /* Balance on wakeup */ |
| 796 | #define SD_WAKE_AFFINE 0x0020 /* Wake task to waking CPU */ |
| 797 | #define SD_PREFER_LOCAL 0x0040 /* Prefer to keep tasks local to this domain */ |
| 798 | #define SD_SHARE_CPUPOWER 0x0080 /* Domain members share cpu power */ |
| 799 | #define SD_POWERSAVINGS_BALANCE 0x0100 /* Balance for power savings */ |
| 800 | #define SD_SHARE_PKG_RESOURCES 0x0200 /* Domain members share cpu pkg resources */ |
| 801 | #define SD_SERIALIZE 0x0400 /* Only a single load balancing instance */ |
| 802 | |
| 803 | #define SD_PREFER_SIBLING 0x1000 /* Prefer to place tasks in a sibling domain */ |
| 804 | |
| 805 | enum powersavings_balance_level { |
| 806 | POWERSAVINGS_BALANCE_NONE = 0, /* No power saving load balance */ |
| 807 | POWERSAVINGS_BALANCE_BASIC, /* Fill one thread/core/package |
| 808 | * first for long running threads |
| 809 | */ |
| 810 | POWERSAVINGS_BALANCE_WAKEUP, /* Also bias task wakeups to semi-idle |
| 811 | * cpu package for power savings |
| 812 | */ |
| 813 | MAX_POWERSAVINGS_BALANCE_LEVELS |
| 814 | }; |
| 815 | |
| 816 | extern int sched_mc_power_savings, sched_smt_power_savings; |
| 817 | |
| 818 | static inline int sd_balance_for_mc_power(void) |
| 819 | { |
| 820 | if (sched_smt_power_savings) |
| 821 | return SD_POWERSAVINGS_BALANCE; |
| 822 | |
| 823 | if (!sched_mc_power_savings) |
| 824 | return SD_PREFER_SIBLING; |
| 825 | |
| 826 | return 0; |
| 827 | } |
| 828 | |
| 829 | static inline int sd_balance_for_package_power(void) |
| 830 | { |
| 831 | if (sched_mc_power_savings | sched_smt_power_savings) |
| 832 | return SD_POWERSAVINGS_BALANCE; |
| 833 | |
| 834 | return SD_PREFER_SIBLING; |
| 835 | } |
| 836 | |
| 837 | /* |
| 838 | * Optimise SD flags for power savings: |
| 839 | * SD_BALANCE_NEWIDLE helps agressive task consolidation and power savings. |
| 840 | * Keep default SD flags if sched_{smt,mc}_power_saving=0 |
| 841 | */ |
| 842 | |
| 843 | static inline int sd_power_saving_flags(void) |
| 844 | { |
| 845 | if (sched_mc_power_savings | sched_smt_power_savings) |
| 846 | return SD_BALANCE_NEWIDLE; |
| 847 | |
| 848 | return 0; |
| 849 | } |
| 850 | |
| 851 | struct sched_group { |
| 852 | struct sched_group *next; /* Must be a circular list */ |
| 853 | |
| 854 | /* |
| 855 | * CPU power of this group, SCHED_LOAD_SCALE being max power for a |
| 856 | * single CPU. |
| 857 | */ |
| 858 | unsigned int cpu_power; |
| 859 | |
| 860 | /* |
| 861 | * The CPUs this group covers. |
| 862 | * |
| 863 | * NOTE: this field is variable length. (Allocated dynamically |
| 864 | * by attaching extra space to the end of the structure, |
| 865 | * depending on how many CPUs the kernel has booted up with) |
| 866 | * |
| 867 | * It is also be embedded into static data structures at build |
| 868 | * time. (See 'struct static_sched_group' in kernel/sched.c) |
| 869 | */ |
| 870 | unsigned long cpumask[0]; |
| 871 | }; |
| 872 | |
| 873 | static inline struct cpumask *sched_group_cpus(struct sched_group *sg) |
| 874 | { |
| 875 | return to_cpumask(sg->cpumask); |
| 876 | } |
| 877 | |
| 878 | enum sched_domain_level { |
| 879 | SD_LV_NONE = 0, |
| 880 | SD_LV_SIBLING, |
| 881 | SD_LV_MC, |
| 882 | SD_LV_CPU, |
| 883 | SD_LV_NODE, |
| 884 | SD_LV_ALLNODES, |
| 885 | SD_LV_MAX |
| 886 | }; |
| 887 | |
| 888 | struct sched_domain_attr { |
| 889 | int relax_domain_level; |
| 890 | }; |
| 891 | |
| 892 | #define SD_ATTR_INIT (struct sched_domain_attr) { \ |
| 893 | .relax_domain_level = -1, \ |
| 894 | } |
| 895 | |
| 896 | struct sched_domain { |
| 897 | /* These fields must be setup */ |
| 898 | struct sched_domain *parent; /* top domain must be null terminated */ |
| 899 | struct sched_domain *child; /* bottom domain must be null terminated */ |
| 900 | struct sched_group *groups; /* the balancing groups of the domain */ |
| 901 | unsigned long min_interval; /* Minimum balance interval ms */ |
| 902 | unsigned long max_interval; /* Maximum balance interval ms */ |
| 903 | unsigned int busy_factor; /* less balancing by factor if busy */ |
| 904 | unsigned int imbalance_pct; /* No balance until over watermark */ |
| 905 | unsigned int cache_nice_tries; /* Leave cache hot tasks for # tries */ |
| 906 | unsigned int busy_idx; |
| 907 | unsigned int idle_idx; |
| 908 | unsigned int newidle_idx; |
| 909 | unsigned int wake_idx; |
| 910 | unsigned int forkexec_idx; |
| 911 | unsigned int smt_gain; |
| 912 | int flags; /* See SD_* */ |
| 913 | enum sched_domain_level level; |
| 914 | |
| 915 | /* Runtime fields. */ |
| 916 | unsigned long last_balance; /* init to jiffies. units in jiffies */ |
| 917 | unsigned int balance_interval; /* initialise to 1. units in ms. */ |
| 918 | unsigned int nr_balance_failed; /* initialise to 0 */ |
| 919 | |
| 920 | u64 last_update; |
| 921 | |
| 922 | #ifdef CONFIG_SCHEDSTATS |
| 923 | /* load_balance() stats */ |
| 924 | unsigned int lb_count[CPU_MAX_IDLE_TYPES]; |
| 925 | unsigned int lb_failed[CPU_MAX_IDLE_TYPES]; |
| 926 | unsigned int lb_balanced[CPU_MAX_IDLE_TYPES]; |
| 927 | unsigned int lb_imbalance[CPU_MAX_IDLE_TYPES]; |
| 928 | unsigned int lb_gained[CPU_MAX_IDLE_TYPES]; |
| 929 | unsigned int lb_hot_gained[CPU_MAX_IDLE_TYPES]; |
| 930 | unsigned int lb_nobusyg[CPU_MAX_IDLE_TYPES]; |
| 931 | unsigned int lb_nobusyq[CPU_MAX_IDLE_TYPES]; |
| 932 | |
| 933 | /* Active load balancing */ |
| 934 | unsigned int alb_count; |
| 935 | unsigned int alb_failed; |
| 936 | unsigned int alb_pushed; |
| 937 | |
| 938 | /* SD_BALANCE_EXEC stats */ |
| 939 | unsigned int sbe_count; |
| 940 | unsigned int sbe_balanced; |
| 941 | unsigned int sbe_pushed; |
| 942 | |
| 943 | /* SD_BALANCE_FORK stats */ |
| 944 | unsigned int sbf_count; |
| 945 | unsigned int sbf_balanced; |
| 946 | unsigned int sbf_pushed; |
| 947 | |
| 948 | /* try_to_wake_up() stats */ |
| 949 | unsigned int ttwu_wake_remote; |
| 950 | unsigned int ttwu_move_affine; |
| 951 | unsigned int ttwu_move_balance; |
| 952 | #endif |
| 953 | #ifdef CONFIG_SCHED_DEBUG |
| 954 | char *name; |
| 955 | #endif |
| 956 | |
| 957 | /* |
| 958 | * Span of all CPUs in this domain. |
| 959 | * |
| 960 | * NOTE: this field is variable length. (Allocated dynamically |
| 961 | * by attaching extra space to the end of the structure, |
| 962 | * depending on how many CPUs the kernel has booted up with) |
| 963 | * |
| 964 | * It is also be embedded into static data structures at build |
| 965 | * time. (See 'struct static_sched_domain' in kernel/sched.c) |
| 966 | */ |
| 967 | unsigned long span[0]; |
| 968 | }; |
| 969 | |
| 970 | static inline struct cpumask *sched_domain_span(struct sched_domain *sd) |
| 971 | { |
| 972 | return to_cpumask(sd->span); |
| 973 | } |
| 974 | |
| 975 | extern void partition_sched_domains(int ndoms_new, cpumask_var_t doms_new[], |
| 976 | struct sched_domain_attr *dattr_new); |
| 977 | |
| 978 | /* Allocate an array of sched domains, for partition_sched_domains(). */ |
| 979 | cpumask_var_t *alloc_sched_domains(unsigned int ndoms); |
| 980 | void free_sched_domains(cpumask_var_t doms[], unsigned int ndoms); |
| 981 | |
| 982 | /* Test a flag in parent sched domain */ |
| 983 | static inline int test_sd_parent(struct sched_domain *sd, int flag) |
| 984 | { |
| 985 | if (sd->parent && (sd->parent->flags & flag)) |
| 986 | return 1; |
| 987 | |
| 988 | return 0; |
| 989 | } |
| 990 | |
| 991 | unsigned long default_scale_freq_power(struct sched_domain *sd, int cpu); |
| 992 | unsigned long default_scale_smt_power(struct sched_domain *sd, int cpu); |
| 993 | |
| 994 | #else /* CONFIG_SMP */ |
| 995 | |
| 996 | struct sched_domain_attr; |
| 997 | |
| 998 | static inline void |
| 999 | partition_sched_domains(int ndoms_new, cpumask_var_t doms_new[], |
| 1000 | struct sched_domain_attr *dattr_new) |
| 1001 | { |
| 1002 | } |
| 1003 | #endif /* !CONFIG_SMP */ |
| 1004 | |
| 1005 | |
| 1006 | struct io_context; /* See blkdev.h */ |
| 1007 | |
| 1008 | |
| 1009 | #ifdef ARCH_HAS_PREFETCH_SWITCH_STACK |
| 1010 | extern void prefetch_stack(struct task_struct *t); |
| 1011 | #else |
| 1012 | static inline void prefetch_stack(struct task_struct *t) { } |
| 1013 | #endif |
| 1014 | |
| 1015 | struct audit_context; /* See audit.c */ |
| 1016 | struct mempolicy; |
| 1017 | struct pipe_inode_info; |
| 1018 | struct uts_namespace; |
| 1019 | |
| 1020 | struct rq; |
| 1021 | struct sched_domain; |
| 1022 | |
| 1023 | /* |
| 1024 | * wake flags |
| 1025 | */ |
| 1026 | #define WF_SYNC 0x01 /* waker goes to sleep after wakup */ |
| 1027 | #define WF_FORK 0x02 /* child wakeup after fork */ |
| 1028 | |
| 1029 | struct sched_class { |
| 1030 | const struct sched_class *next; |
| 1031 | |
| 1032 | void (*enqueue_task) (struct rq *rq, struct task_struct *p, int wakeup, |
| 1033 | bool head); |
| 1034 | void (*dequeue_task) (struct rq *rq, struct task_struct *p, int sleep); |
| 1035 | void (*yield_task) (struct rq *rq); |
| 1036 | |
| 1037 | void (*check_preempt_curr) (struct rq *rq, struct task_struct *p, int flags); |
| 1038 | |
| 1039 | struct task_struct * (*pick_next_task) (struct rq *rq); |
| 1040 | void (*put_prev_task) (struct rq *rq, struct task_struct *p); |
| 1041 | |
| 1042 | #ifdef CONFIG_SMP |
| 1043 | int (*select_task_rq)(struct task_struct *p, int sd_flag, int flags); |
| 1044 | |
| 1045 | void (*pre_schedule) (struct rq *this_rq, struct task_struct *task); |
| 1046 | void (*post_schedule) (struct rq *this_rq); |
| 1047 | void (*task_waking) (struct rq *this_rq, struct task_struct *task); |
| 1048 | void (*task_woken) (struct rq *this_rq, struct task_struct *task); |
| 1049 | |
| 1050 | void (*set_cpus_allowed)(struct task_struct *p, |
| 1051 | const struct cpumask *newmask); |
| 1052 | |
| 1053 | void (*rq_online)(struct rq *rq); |
| 1054 | void (*rq_offline)(struct rq *rq); |
| 1055 | #endif |
| 1056 | |
| 1057 | void (*set_curr_task) (struct rq *rq); |
| 1058 | void (*task_tick) (struct rq *rq, struct task_struct *p, int queued); |
| 1059 | void (*task_fork) (struct task_struct *p); |
| 1060 | |
| 1061 | void (*switched_from) (struct rq *this_rq, struct task_struct *task, |
| 1062 | int running); |
| 1063 | void (*switched_to) (struct rq *this_rq, struct task_struct *task, |
| 1064 | int running); |
| 1065 | void (*prio_changed) (struct rq *this_rq, struct task_struct *task, |
| 1066 | int oldprio, int running); |
| 1067 | |
| 1068 | unsigned int (*get_rr_interval) (struct rq *rq, |
| 1069 | struct task_struct *task); |
| 1070 | |
| 1071 | #ifdef CONFIG_FAIR_GROUP_SCHED |
| 1072 | void (*moved_group) (struct task_struct *p, int on_rq); |
| 1073 | #endif |
| 1074 | }; |
| 1075 | |
| 1076 | struct load_weight { |
| 1077 | unsigned long weight, inv_weight; |
| 1078 | }; |
| 1079 | |
| 1080 | /* |
| 1081 | * CFS stats for a schedulable entity (task, task-group etc) |
| 1082 | * |
| 1083 | * Current field usage histogram: |
| 1084 | * |
| 1085 | * 4 se->block_start |
| 1086 | * 4 se->run_node |
| 1087 | * 4 se->sleep_start |
| 1088 | * 6 se->load.weight |
| 1089 | */ |
| 1090 | struct sched_entity { |
| 1091 | struct load_weight load; /* for load-balancing */ |
| 1092 | struct rb_node run_node; |
| 1093 | struct list_head group_node; |
| 1094 | unsigned int on_rq; |
| 1095 | |
| 1096 | u64 exec_start; |
| 1097 | u64 sum_exec_runtime; |
| 1098 | u64 vruntime; |
| 1099 | u64 prev_sum_exec_runtime; |
| 1100 | |
| 1101 | u64 last_wakeup; |
| 1102 | u64 avg_overlap; |
| 1103 | |
| 1104 | u64 nr_migrations; |
| 1105 | |
| 1106 | u64 start_runtime; |
| 1107 | u64 avg_wakeup; |
| 1108 | |
| 1109 | #ifdef CONFIG_SCHEDSTATS |
| 1110 | u64 wait_start; |
| 1111 | u64 wait_max; |
| 1112 | u64 wait_count; |
| 1113 | u64 wait_sum; |
| 1114 | u64 iowait_count; |
| 1115 | u64 iowait_sum; |
| 1116 | |
| 1117 | u64 sleep_start; |
| 1118 | u64 sleep_max; |
| 1119 | s64 sum_sleep_runtime; |
| 1120 | |
| 1121 | u64 block_start; |
| 1122 | u64 block_max; |
| 1123 | u64 exec_max; |
| 1124 | u64 slice_max; |
| 1125 | |
| 1126 | u64 nr_migrations_cold; |
| 1127 | u64 nr_failed_migrations_affine; |
| 1128 | u64 nr_failed_migrations_running; |
| 1129 | u64 nr_failed_migrations_hot; |
| 1130 | u64 nr_forced_migrations; |
| 1131 | |
| 1132 | u64 nr_wakeups; |
| 1133 | u64 nr_wakeups_sync; |
| 1134 | u64 nr_wakeups_migrate; |
| 1135 | u64 nr_wakeups_local; |
| 1136 | u64 nr_wakeups_remote; |
| 1137 | u64 nr_wakeups_affine; |
| 1138 | u64 nr_wakeups_affine_attempts; |
| 1139 | u64 nr_wakeups_passive; |
| 1140 | u64 nr_wakeups_idle; |
| 1141 | #endif |
| 1142 | |
| 1143 | #ifdef CONFIG_FAIR_GROUP_SCHED |
| 1144 | struct sched_entity *parent; |
| 1145 | /* rq on which this entity is (to be) queued: */ |
| 1146 | struct cfs_rq *cfs_rq; |
| 1147 | /* rq "owned" by this entity/group: */ |
| 1148 | struct cfs_rq *my_q; |
| 1149 | #endif |
| 1150 | }; |
| 1151 | |
| 1152 | struct sched_rt_entity { |
| 1153 | struct list_head run_list; |
| 1154 | unsigned long timeout; |
| 1155 | unsigned int time_slice; |
| 1156 | int nr_cpus_allowed; |
| 1157 | |
| 1158 | struct sched_rt_entity *back; |
| 1159 | #ifdef CONFIG_RT_GROUP_SCHED |
| 1160 | struct sched_rt_entity *parent; |
| 1161 | /* rq on which this entity is (to be) queued: */ |
| 1162 | struct rt_rq *rt_rq; |
| 1163 | /* rq "owned" by this entity/group: */ |
| 1164 | struct rt_rq *my_q; |
| 1165 | #endif |
| 1166 | }; |
| 1167 | |
| 1168 | struct rcu_node; |
| 1169 | |
| 1170 | struct task_struct { |
| 1171 | volatile long state; /* -1 unrunnable, 0 runnable, >0 stopped */ |
| 1172 | void *stack; |
| 1173 | atomic_t usage; |
| 1174 | unsigned int flags; /* per process flags, defined below */ |
| 1175 | unsigned int ptrace; |
| 1176 | |
| 1177 | int lock_depth; /* BKL lock depth */ |
| 1178 | |
| 1179 | #ifdef CONFIG_SMP |
| 1180 | #ifdef __ARCH_WANT_UNLOCKED_CTXSW |
| 1181 | int oncpu; |
| 1182 | #endif |
| 1183 | #endif |
| 1184 | |
| 1185 | int prio, static_prio, normal_prio; |
| 1186 | unsigned int rt_priority; |
| 1187 | const struct sched_class *sched_class; |
| 1188 | struct sched_entity se; |
| 1189 | struct sched_rt_entity rt; |
| 1190 | |
| 1191 | #ifdef CONFIG_PREEMPT_NOTIFIERS |
| 1192 | /* list of struct preempt_notifier: */ |
| 1193 | struct hlist_head preempt_notifiers; |
| 1194 | #endif |
| 1195 | |
| 1196 | /* |
| 1197 | * fpu_counter contains the number of consecutive context switches |
| 1198 | * that the FPU is used. If this is over a threshold, the lazy fpu |
| 1199 | * saving becomes unlazy to save the trap. This is an unsigned char |
| 1200 | * so that after 256 times the counter wraps and the behavior turns |
| 1201 | * lazy again; this to deal with bursty apps that only use FPU for |
| 1202 | * a short time |
| 1203 | */ |
| 1204 | unsigned char fpu_counter; |
| 1205 | #ifdef CONFIG_BLK_DEV_IO_TRACE |
| 1206 | unsigned int btrace_seq; |
| 1207 | #endif |
| 1208 | |
| 1209 | unsigned int policy; |
| 1210 | cpumask_t cpus_allowed; |
| 1211 | |
| 1212 | #ifdef CONFIG_TREE_PREEMPT_RCU |
| 1213 | int rcu_read_lock_nesting; |
| 1214 | char rcu_read_unlock_special; |
| 1215 | struct rcu_node *rcu_blocked_node; |
| 1216 | struct list_head rcu_node_entry; |
| 1217 | #endif /* #ifdef CONFIG_TREE_PREEMPT_RCU */ |
| 1218 | |
| 1219 | #if defined(CONFIG_SCHEDSTATS) || defined(CONFIG_TASK_DELAY_ACCT) |
| 1220 | struct sched_info sched_info; |
| 1221 | #endif |
| 1222 | |
| 1223 | struct list_head tasks; |
| 1224 | struct plist_node pushable_tasks; |
| 1225 | |
| 1226 | struct mm_struct *mm, *active_mm; |
| 1227 | #if defined(SPLIT_RSS_COUNTING) |
| 1228 | struct task_rss_stat rss_stat; |
| 1229 | #endif |
| 1230 | /* task state */ |
| 1231 | int exit_state; |
| 1232 | int exit_code, exit_signal; |
| 1233 | int pdeath_signal; /* The signal sent when the parent dies */ |
| 1234 | /* ??? */ |
| 1235 | unsigned int personality; |
| 1236 | unsigned did_exec:1; |
| 1237 | unsigned in_execve:1; /* Tell the LSMs that the process is doing an |
| 1238 | * execve */ |
| 1239 | unsigned in_iowait:1; |
| 1240 | |
| 1241 | |
| 1242 | /* Revert to default priority/policy when forking */ |
| 1243 | unsigned sched_reset_on_fork:1; |
| 1244 | |
| 1245 | pid_t pid; |
| 1246 | pid_t tgid; |
| 1247 | |
| 1248 | #ifdef CONFIG_CC_STACKPROTECTOR |
| 1249 | /* Canary value for the -fstack-protector gcc feature */ |
| 1250 | unsigned long stack_canary; |
| 1251 | #endif |
| 1252 | |
| 1253 | /* |
| 1254 | * pointers to (original) parent process, youngest child, younger sibling, |
| 1255 | * older sibling, respectively. (p->father can be replaced with |
| 1256 | * p->real_parent->pid) |
| 1257 | */ |
| 1258 | struct task_struct *real_parent; /* real parent process */ |
| 1259 | struct task_struct *parent; /* recipient of SIGCHLD, wait4() reports */ |
| 1260 | /* |
| 1261 | * children/sibling forms the list of my natural children |
| 1262 | */ |
| 1263 | struct list_head children; /* list of my children */ |
| 1264 | struct list_head sibling; /* linkage in my parent's children list */ |
| 1265 | struct task_struct *group_leader; /* threadgroup leader */ |
| 1266 | |
| 1267 | /* |
| 1268 | * ptraced is the list of tasks this task is using ptrace on. |
| 1269 | * This includes both natural children and PTRACE_ATTACH targets. |
| 1270 | * p->ptrace_entry is p's link on the p->parent->ptraced list. |
| 1271 | */ |
| 1272 | struct list_head ptraced; |
| 1273 | struct list_head ptrace_entry; |
| 1274 | |
| 1275 | /* |
| 1276 | * This is the tracer handle for the ptrace BTS extension. |
| 1277 | * This field actually belongs to the ptracer task. |
| 1278 | */ |
| 1279 | struct bts_context *bts; |
| 1280 | |
| 1281 | /* PID/PID hash table linkage. */ |
| 1282 | struct pid_link pids[PIDTYPE_MAX]; |
| 1283 | struct list_head thread_group; |
| 1284 | |
| 1285 | struct completion *vfork_done; /* for vfork() */ |
| 1286 | int __user *set_child_tid; /* CLONE_CHILD_SETTID */ |
| 1287 | int __user *clear_child_tid; /* CLONE_CHILD_CLEARTID */ |
| 1288 | |
| 1289 | cputime_t utime, stime, utimescaled, stimescaled; |
| 1290 | cputime_t gtime; |
| 1291 | #ifndef CONFIG_VIRT_CPU_ACCOUNTING |
| 1292 | cputime_t prev_utime, prev_stime; |
| 1293 | #endif |
| 1294 | unsigned long nvcsw, nivcsw; /* context switch counts */ |
| 1295 | struct timespec start_time; /* monotonic time */ |
| 1296 | struct timespec real_start_time; /* boot based time */ |
| 1297 | /* mm fault and swap info: this can arguably be seen as either mm-specific or thread-specific */ |
| 1298 | unsigned long min_flt, maj_flt; |
| 1299 | |
| 1300 | struct task_cputime cputime_expires; |
| 1301 | struct list_head cpu_timers[3]; |
| 1302 | |
| 1303 | /* process credentials */ |
| 1304 | const struct cred *real_cred; /* objective and real subjective task |
| 1305 | * credentials (COW) */ |
| 1306 | const struct cred *cred; /* effective (overridable) subjective task |
| 1307 | * credentials (COW) */ |
| 1308 | struct mutex cred_guard_mutex; /* guard against foreign influences on |
| 1309 | * credential calculations |
| 1310 | * (notably. ptrace) */ |
| 1311 | struct cred *replacement_session_keyring; /* for KEYCTL_SESSION_TO_PARENT */ |
| 1312 | |
| 1313 | char comm[TASK_COMM_LEN]; /* executable name excluding path |
| 1314 | - access with [gs]et_task_comm (which lock |
| 1315 | it with task_lock()) |
| 1316 | - initialized normally by setup_new_exec */ |
| 1317 | /* file system info */ |
| 1318 | int link_count, total_link_count; |
| 1319 | #ifdef CONFIG_SYSVIPC |
| 1320 | /* ipc stuff */ |
| 1321 | struct sysv_sem sysvsem; |
| 1322 | #endif |
| 1323 | #ifdef CONFIG_DETECT_HUNG_TASK |
| 1324 | /* hung task detection */ |
| 1325 | unsigned long last_switch_count; |
| 1326 | #endif |
| 1327 | /* CPU-specific state of this task */ |
| 1328 | struct thread_struct thread; |
| 1329 | /* filesystem information */ |
| 1330 | struct fs_struct *fs; |
| 1331 | /* open file information */ |
| 1332 | struct files_struct *files; |
| 1333 | /* namespaces */ |
| 1334 | struct nsproxy *nsproxy; |
| 1335 | /* signal handlers */ |
| 1336 | struct signal_struct *signal; |
| 1337 | struct sighand_struct *sighand; |
| 1338 | |
| 1339 | sigset_t blocked, real_blocked; |
| 1340 | sigset_t saved_sigmask; /* restored if set_restore_sigmask() was used */ |
| 1341 | struct sigpending pending; |
| 1342 | |
| 1343 | unsigned long sas_ss_sp; |
| 1344 | size_t sas_ss_size; |
| 1345 | int (*notifier)(void *priv); |
| 1346 | void *notifier_data; |
| 1347 | sigset_t *notifier_mask; |
| 1348 | struct audit_context *audit_context; |
| 1349 | #ifdef CONFIG_AUDITSYSCALL |
| 1350 | uid_t loginuid; |
| 1351 | unsigned int sessionid; |
| 1352 | #endif |
| 1353 | seccomp_t seccomp; |
| 1354 | |
| 1355 | /* Thread group tracking */ |
| 1356 | u32 parent_exec_id; |
| 1357 | u32 self_exec_id; |
| 1358 | /* Protection of (de-)allocation: mm, files, fs, tty, keyrings, mems_allowed, |
| 1359 | * mempolicy */ |
| 1360 | spinlock_t alloc_lock; |
| 1361 | |
| 1362 | #ifdef CONFIG_GENERIC_HARDIRQS |
| 1363 | /* IRQ handler threads */ |
| 1364 | struct irqaction *irqaction; |
| 1365 | #endif |
| 1366 | |
| 1367 | /* Protection of the PI data structures: */ |
| 1368 | raw_spinlock_t pi_lock; |
| 1369 | |
| 1370 | #ifdef CONFIG_RT_MUTEXES |
| 1371 | /* PI waiters blocked on a rt_mutex held by this task */ |
| 1372 | struct plist_head pi_waiters; |
| 1373 | /* Deadlock detection and priority inheritance handling */ |
| 1374 | struct rt_mutex_waiter *pi_blocked_on; |
| 1375 | #endif |
| 1376 | |
| 1377 | #ifdef CONFIG_DEBUG_MUTEXES |
| 1378 | /* mutex deadlock detection */ |
| 1379 | struct mutex_waiter *blocked_on; |
| 1380 | #endif |
| 1381 | #ifdef CONFIG_TRACE_IRQFLAGS |
| 1382 | unsigned int irq_events; |
| 1383 | unsigned long hardirq_enable_ip; |
| 1384 | unsigned long hardirq_disable_ip; |
| 1385 | unsigned int hardirq_enable_event; |
| 1386 | unsigned int hardirq_disable_event; |
| 1387 | int hardirqs_enabled; |
| 1388 | int hardirq_context; |
| 1389 | unsigned long softirq_disable_ip; |
| 1390 | unsigned long softirq_enable_ip; |
| 1391 | unsigned int softirq_disable_event; |
| 1392 | unsigned int softirq_enable_event; |
| 1393 | int softirqs_enabled; |
| 1394 | int softirq_context; |
| 1395 | #endif |
| 1396 | #ifdef CONFIG_LOCKDEP |
| 1397 | # define MAX_LOCK_DEPTH 48UL |
| 1398 | u64 curr_chain_key; |
| 1399 | int lockdep_depth; |
| 1400 | unsigned int lockdep_recursion; |
| 1401 | struct held_lock held_locks[MAX_LOCK_DEPTH]; |
| 1402 | gfp_t lockdep_reclaim_gfp; |
| 1403 | #endif |
| 1404 | |
| 1405 | /* journalling filesystem info */ |
| 1406 | void *journal_info; |
| 1407 | |
| 1408 | /* stacked block device info */ |
| 1409 | struct bio_list *bio_list; |
| 1410 | |
| 1411 | /* VM state */ |
| 1412 | struct reclaim_state *reclaim_state; |
| 1413 | |
| 1414 | struct backing_dev_info *backing_dev_info; |
| 1415 | |
| 1416 | struct io_context *io_context; |
| 1417 | |
| 1418 | unsigned long ptrace_message; |
| 1419 | siginfo_t *last_siginfo; /* For ptrace use. */ |
| 1420 | struct task_io_accounting ioac; |
| 1421 | #if defined(CONFIG_TASK_XACCT) |
| 1422 | u64 acct_rss_mem1; /* accumulated rss usage */ |
| 1423 | u64 acct_vm_mem1; /* accumulated virtual memory usage */ |
| 1424 | cputime_t acct_timexpd; /* stime + utime since last update */ |
| 1425 | #endif |
| 1426 | #ifdef CONFIG_CPUSETS |
| 1427 | nodemask_t mems_allowed; /* Protected by alloc_lock */ |
| 1428 | int cpuset_mem_spread_rotor; |
| 1429 | #endif |
| 1430 | #ifdef CONFIG_CGROUPS |
| 1431 | /* Control Group info protected by css_set_lock */ |
| 1432 | struct css_set *cgroups; |
| 1433 | /* cg_list protected by css_set_lock and tsk->alloc_lock */ |
| 1434 | struct list_head cg_list; |
| 1435 | #endif |
| 1436 | #ifdef CONFIG_FUTEX |
| 1437 | struct robust_list_head __user *robust_list; |
| 1438 | #ifdef CONFIG_COMPAT |
| 1439 | struct compat_robust_list_head __user *compat_robust_list; |
| 1440 | #endif |
| 1441 | struct list_head pi_state_list; |
| 1442 | struct futex_pi_state *pi_state_cache; |
| 1443 | #endif |
| 1444 | #ifdef CONFIG_PERF_EVENTS |
| 1445 | struct perf_event_context *perf_event_ctxp; |
| 1446 | struct mutex perf_event_mutex; |
| 1447 | struct list_head perf_event_list; |
| 1448 | #endif |
| 1449 | #ifdef CONFIG_NUMA |
| 1450 | struct mempolicy *mempolicy; /* Protected by alloc_lock */ |
| 1451 | short il_next; |
| 1452 | #endif |
| 1453 | atomic_t fs_excl; /* holding fs exclusive resources */ |
| 1454 | struct rcu_head rcu; |
| 1455 | |
| 1456 | /* |
| 1457 | * cache last used pipe for splice |
| 1458 | */ |
| 1459 | struct pipe_inode_info *splice_pipe; |
| 1460 | #ifdef CONFIG_TASK_DELAY_ACCT |
| 1461 | struct task_delay_info *delays; |
| 1462 | #endif |
| 1463 | #ifdef CONFIG_FAULT_INJECTION |
| 1464 | int make_it_fail; |
| 1465 | #endif |
| 1466 | struct prop_local_single dirties; |
| 1467 | #ifdef CONFIG_LATENCYTOP |
| 1468 | int latency_record_count; |
| 1469 | struct latency_record latency_record[LT_SAVECOUNT]; |
| 1470 | #endif |
| 1471 | /* |
| 1472 | * time slack values; these are used to round up poll() and |
| 1473 | * select() etc timeout values. These are in nanoseconds. |
| 1474 | */ |
| 1475 | unsigned long timer_slack_ns; |
| 1476 | unsigned long default_timer_slack_ns; |
| 1477 | |
| 1478 | struct list_head *scm_work_list; |
| 1479 | #ifdef CONFIG_FUNCTION_GRAPH_TRACER |
| 1480 | /* Index of current stored address in ret_stack */ |
| 1481 | int curr_ret_stack; |
| 1482 | /* Stack of return addresses for return function tracing */ |
| 1483 | struct ftrace_ret_stack *ret_stack; |
| 1484 | /* time stamp for last schedule */ |
| 1485 | unsigned long long ftrace_timestamp; |
| 1486 | /* |
| 1487 | * Number of functions that haven't been traced |
| 1488 | * because of depth overrun. |
| 1489 | */ |
| 1490 | atomic_t trace_overrun; |
| 1491 | /* Pause for the tracing */ |
| 1492 | atomic_t tracing_graph_pause; |
| 1493 | #endif |
| 1494 | #ifdef CONFIG_TRACING |
| 1495 | /* state flags for use by tracers */ |
| 1496 | unsigned long trace; |
| 1497 | /* bitmask of trace recursion */ |
| 1498 | unsigned long trace_recursion; |
| 1499 | #endif /* CONFIG_TRACING */ |
| 1500 | #ifdef CONFIG_CGROUP_MEM_RES_CTLR /* memcg uses this to do batch job */ |
| 1501 | struct memcg_batch_info { |
| 1502 | int do_batch; /* incremented when batch uncharge started */ |
| 1503 | struct mem_cgroup *memcg; /* target memcg of uncharge */ |
| 1504 | unsigned long bytes; /* uncharged usage */ |
| 1505 | unsigned long memsw_bytes; /* uncharged mem+swap usage */ |
| 1506 | } memcg_batch; |
| 1507 | #endif |
| 1508 | }; |
| 1509 | |
| 1510 | /* Future-safe accessor for struct task_struct's cpus_allowed. */ |
| 1511 | #define tsk_cpus_allowed(tsk) (&(tsk)->cpus_allowed) |
| 1512 | |
| 1513 | /* |
| 1514 | * Priority of a process goes from 0..MAX_PRIO-1, valid RT |
| 1515 | * priority is 0..MAX_RT_PRIO-1, and SCHED_NORMAL/SCHED_BATCH |
| 1516 | * tasks are in the range MAX_RT_PRIO..MAX_PRIO-1. Priority |
| 1517 | * values are inverted: lower p->prio value means higher priority. |
| 1518 | * |
| 1519 | * The MAX_USER_RT_PRIO value allows the actual maximum |
| 1520 | * RT priority to be separate from the value exported to |
| 1521 | * user-space. This allows kernel threads to set their |
| 1522 | * priority to a value higher than any user task. Note: |
| 1523 | * MAX_RT_PRIO must not be smaller than MAX_USER_RT_PRIO. |
| 1524 | */ |
| 1525 | |
| 1526 | #define MAX_USER_RT_PRIO 100 |
| 1527 | #define MAX_RT_PRIO MAX_USER_RT_PRIO |
| 1528 | |
| 1529 | #define MAX_PRIO (MAX_RT_PRIO + 40) |
| 1530 | #define DEFAULT_PRIO (MAX_RT_PRIO + 20) |
| 1531 | |
| 1532 | static inline int rt_prio(int prio) |
| 1533 | { |
| 1534 | if (unlikely(prio < MAX_RT_PRIO)) |
| 1535 | return 1; |
| 1536 | return 0; |
| 1537 | } |
| 1538 | |
| 1539 | static inline int rt_task(struct task_struct *p) |
| 1540 | { |
| 1541 | return rt_prio(p->prio); |
| 1542 | } |
| 1543 | |
| 1544 | static inline struct pid *task_pid(struct task_struct *task) |
| 1545 | { |
| 1546 | return task->pids[PIDTYPE_PID].pid; |
| 1547 | } |
| 1548 | |
| 1549 | static inline struct pid *task_tgid(struct task_struct *task) |
| 1550 | { |
| 1551 | return task->group_leader->pids[PIDTYPE_PID].pid; |
| 1552 | } |
| 1553 | |
| 1554 | /* |
| 1555 | * Without tasklist or rcu lock it is not safe to dereference |
| 1556 | * the result of task_pgrp/task_session even if task == current, |
| 1557 | * we can race with another thread doing sys_setsid/sys_setpgid. |
| 1558 | */ |
| 1559 | static inline struct pid *task_pgrp(struct task_struct *task) |
| 1560 | { |
| 1561 | return task->group_leader->pids[PIDTYPE_PGID].pid; |
| 1562 | } |
| 1563 | |
| 1564 | static inline struct pid *task_session(struct task_struct *task) |
| 1565 | { |
| 1566 | return task->group_leader->pids[PIDTYPE_SID].pid; |
| 1567 | } |
| 1568 | |
| 1569 | struct pid_namespace; |
| 1570 | |
| 1571 | /* |
| 1572 | * the helpers to get the task's different pids as they are seen |
| 1573 | * from various namespaces |
| 1574 | * |
| 1575 | * task_xid_nr() : global id, i.e. the id seen from the init namespace; |
| 1576 | * task_xid_vnr() : virtual id, i.e. the id seen from the pid namespace of |
| 1577 | * current. |
| 1578 | * task_xid_nr_ns() : id seen from the ns specified; |
| 1579 | * |
| 1580 | * set_task_vxid() : assigns a virtual id to a task; |
| 1581 | * |
| 1582 | * see also pid_nr() etc in include/linux/pid.h |
| 1583 | */ |
| 1584 | pid_t __task_pid_nr_ns(struct task_struct *task, enum pid_type type, |
| 1585 | struct pid_namespace *ns); |
| 1586 | |
| 1587 | static inline pid_t task_pid_nr(struct task_struct *tsk) |
| 1588 | { |
| 1589 | return tsk->pid; |
| 1590 | } |
| 1591 | |
| 1592 | static inline pid_t task_pid_nr_ns(struct task_struct *tsk, |
| 1593 | struct pid_namespace *ns) |
| 1594 | { |
| 1595 | return __task_pid_nr_ns(tsk, PIDTYPE_PID, ns); |
| 1596 | } |
| 1597 | |
| 1598 | static inline pid_t task_pid_vnr(struct task_struct *tsk) |
| 1599 | { |
| 1600 | return __task_pid_nr_ns(tsk, PIDTYPE_PID, NULL); |
| 1601 | } |
| 1602 | |
| 1603 | |
| 1604 | static inline pid_t task_tgid_nr(struct task_struct *tsk) |
| 1605 | { |
| 1606 | return tsk->tgid; |
| 1607 | } |
| 1608 | |
| 1609 | pid_t task_tgid_nr_ns(struct task_struct *tsk, struct pid_namespace *ns); |
| 1610 | |
| 1611 | static inline pid_t task_tgid_vnr(struct task_struct *tsk) |
| 1612 | { |
| 1613 | return pid_vnr(task_tgid(tsk)); |
| 1614 | } |
| 1615 | |
| 1616 | |
| 1617 | static inline pid_t task_pgrp_nr_ns(struct task_struct *tsk, |
| 1618 | struct pid_namespace *ns) |
| 1619 | { |
| 1620 | return __task_pid_nr_ns(tsk, PIDTYPE_PGID, ns); |
| 1621 | } |
| 1622 | |
| 1623 | static inline pid_t task_pgrp_vnr(struct task_struct *tsk) |
| 1624 | { |
| 1625 | return __task_pid_nr_ns(tsk, PIDTYPE_PGID, NULL); |
| 1626 | } |
| 1627 | |
| 1628 | |
| 1629 | static inline pid_t task_session_nr_ns(struct task_struct *tsk, |
| 1630 | struct pid_namespace *ns) |
| 1631 | { |
| 1632 | return __task_pid_nr_ns(tsk, PIDTYPE_SID, ns); |
| 1633 | } |
| 1634 | |
| 1635 | static inline pid_t task_session_vnr(struct task_struct *tsk) |
| 1636 | { |
| 1637 | return __task_pid_nr_ns(tsk, PIDTYPE_SID, NULL); |
| 1638 | } |
| 1639 | |
| 1640 | /* obsolete, do not use */ |
| 1641 | static inline pid_t task_pgrp_nr(struct task_struct *tsk) |
| 1642 | { |
| 1643 | return task_pgrp_nr_ns(tsk, &init_pid_ns); |
| 1644 | } |
| 1645 | |
| 1646 | /** |
| 1647 | * pid_alive - check that a task structure is not stale |
| 1648 | * @p: Task structure to be checked. |
| 1649 | * |
| 1650 | * Test if a process is not yet dead (at most zombie state) |
| 1651 | * If pid_alive fails, then pointers within the task structure |
| 1652 | * can be stale and must not be dereferenced. |
| 1653 | */ |
| 1654 | static inline int pid_alive(struct task_struct *p) |
| 1655 | { |
| 1656 | return p->pids[PIDTYPE_PID].pid != NULL; |
| 1657 | } |
| 1658 | |
| 1659 | /** |
| 1660 | * is_global_init - check if a task structure is init |
| 1661 | * @tsk: Task structure to be checked. |
| 1662 | * |
| 1663 | * Check if a task structure is the first user space task the kernel created. |
| 1664 | */ |
| 1665 | static inline int is_global_init(struct task_struct *tsk) |
| 1666 | { |
| 1667 | return tsk->pid == 1; |
| 1668 | } |
| 1669 | |
| 1670 | /* |
| 1671 | * is_container_init: |
| 1672 | * check whether in the task is init in its own pid namespace. |
| 1673 | */ |
| 1674 | extern int is_container_init(struct task_struct *tsk); |
| 1675 | |
| 1676 | extern struct pid *cad_pid; |
| 1677 | |
| 1678 | extern void free_task(struct task_struct *tsk); |
| 1679 | #define get_task_struct(tsk) do { atomic_inc(&(tsk)->usage); } while(0) |
| 1680 | |
| 1681 | extern void __put_task_struct(struct task_struct *t); |
| 1682 | |
| 1683 | static inline void put_task_struct(struct task_struct *t) |
| 1684 | { |
| 1685 | if (atomic_dec_and_test(&t->usage)) |
| 1686 | __put_task_struct(t); |
| 1687 | } |
| 1688 | |
| 1689 | extern void task_times(struct task_struct *p, cputime_t *ut, cputime_t *st); |
| 1690 | extern void thread_group_times(struct task_struct *p, cputime_t *ut, cputime_t *st); |
| 1691 | |
| 1692 | /* |
| 1693 | * Per process flags |
| 1694 | */ |
| 1695 | #define PF_ALIGNWARN 0x00000001 /* Print alignment warning msgs */ |
| 1696 | /* Not implemented yet, only for 486*/ |
| 1697 | #define PF_STARTING 0x00000002 /* being created */ |
| 1698 | #define PF_EXITING 0x00000004 /* getting shut down */ |
| 1699 | #define PF_EXITPIDONE 0x00000008 /* pi exit done on shut down */ |
| 1700 | #define PF_VCPU 0x00000010 /* I'm a virtual CPU */ |
| 1701 | #define PF_FORKNOEXEC 0x00000040 /* forked but didn't exec */ |
| 1702 | #define PF_MCE_PROCESS 0x00000080 /* process policy on mce errors */ |
| 1703 | #define PF_SUPERPRIV 0x00000100 /* used super-user privileges */ |
| 1704 | #define PF_DUMPCORE 0x00000200 /* dumped core */ |
| 1705 | #define PF_SIGNALED 0x00000400 /* killed by a signal */ |
| 1706 | #define PF_MEMALLOC 0x00000800 /* Allocating memory */ |
| 1707 | #define PF_FLUSHER 0x00001000 /* responsible for disk writeback */ |
| 1708 | #define PF_USED_MATH 0x00002000 /* if unset the fpu must be initialized before use */ |
| 1709 | #define PF_FREEZING 0x00004000 /* freeze in progress. do not account to load */ |
| 1710 | #define PF_NOFREEZE 0x00008000 /* this thread should not be frozen */ |
| 1711 | #define PF_FROZEN 0x00010000 /* frozen for system suspend */ |
| 1712 | #define PF_FSTRANS 0x00020000 /* inside a filesystem transaction */ |
| 1713 | #define PF_KSWAPD 0x00040000 /* I am kswapd */ |
| 1714 | #define PF_OOM_ORIGIN 0x00080000 /* Allocating much memory to others */ |
| 1715 | #define PF_LESS_THROTTLE 0x00100000 /* Throttle me less: I clean memory */ |
| 1716 | #define PF_KTHREAD 0x00200000 /* I am a kernel thread */ |
| 1717 | #define PF_RANDOMIZE 0x00400000 /* randomize virtual address space */ |
| 1718 | #define PF_SWAPWRITE 0x00800000 /* Allowed to write to swap */ |
| 1719 | #define PF_SPREAD_PAGE 0x01000000 /* Spread page cache over cpuset */ |
| 1720 | #define PF_SPREAD_SLAB 0x02000000 /* Spread some slab caches over cpuset */ |
| 1721 | #define PF_THREAD_BOUND 0x04000000 /* Thread bound to specific cpu */ |
| 1722 | #define PF_MCE_EARLY 0x08000000 /* Early kill for mce process policy */ |
| 1723 | #define PF_MEMPOLICY 0x10000000 /* Non-default NUMA mempolicy */ |
| 1724 | #define PF_MUTEX_TESTER 0x20000000 /* Thread belongs to the rt mutex tester */ |
| 1725 | #define PF_FREEZER_SKIP 0x40000000 /* Freezer should not count it as freezeable */ |
| 1726 | #define PF_FREEZER_NOSIG 0x80000000 /* Freezer won't send signals to it */ |
| 1727 | |
| 1728 | /* |
| 1729 | * Only the _current_ task can read/write to tsk->flags, but other |
| 1730 | * tasks can access tsk->flags in readonly mode for example |
| 1731 | * with tsk_used_math (like during threaded core dumping). |
| 1732 | * There is however an exception to this rule during ptrace |
| 1733 | * or during fork: the ptracer task is allowed to write to the |
| 1734 | * child->flags of its traced child (same goes for fork, the parent |
| 1735 | * can write to the child->flags), because we're guaranteed the |
| 1736 | * child is not running and in turn not changing child->flags |
| 1737 | * at the same time the parent does it. |
| 1738 | */ |
| 1739 | #define clear_stopped_child_used_math(child) do { (child)->flags &= ~PF_USED_MATH; } while (0) |
| 1740 | #define set_stopped_child_used_math(child) do { (child)->flags |= PF_USED_MATH; } while (0) |
| 1741 | #define clear_used_math() clear_stopped_child_used_math(current) |
| 1742 | #define set_used_math() set_stopped_child_used_math(current) |
| 1743 | #define conditional_stopped_child_used_math(condition, child) \ |
| 1744 | do { (child)->flags &= ~PF_USED_MATH, (child)->flags |= (condition) ? PF_USED_MATH : 0; } while (0) |
| 1745 | #define conditional_used_math(condition) \ |
| 1746 | conditional_stopped_child_used_math(condition, current) |
| 1747 | #define copy_to_stopped_child_used_math(child) \ |
| 1748 | do { (child)->flags &= ~PF_USED_MATH, (child)->flags |= current->flags & PF_USED_MATH; } while (0) |
| 1749 | /* NOTE: this will return 0 or PF_USED_MATH, it will never return 1 */ |
| 1750 | #define tsk_used_math(p) ((p)->flags & PF_USED_MATH) |
| 1751 | #define used_math() tsk_used_math(current) |
| 1752 | |
| 1753 | #ifdef CONFIG_TREE_PREEMPT_RCU |
| 1754 | |
| 1755 | #define RCU_READ_UNLOCK_BLOCKED (1 << 0) /* blocked while in RCU read-side. */ |
| 1756 | #define RCU_READ_UNLOCK_NEED_QS (1 << 1) /* RCU core needs CPU response. */ |
| 1757 | |
| 1758 | static inline void rcu_copy_process(struct task_struct *p) |
| 1759 | { |
| 1760 | p->rcu_read_lock_nesting = 0; |
| 1761 | p->rcu_read_unlock_special = 0; |
| 1762 | p->rcu_blocked_node = NULL; |
| 1763 | INIT_LIST_HEAD(&p->rcu_node_entry); |
| 1764 | } |
| 1765 | |
| 1766 | #else |
| 1767 | |
| 1768 | static inline void rcu_copy_process(struct task_struct *p) |
| 1769 | { |
| 1770 | } |
| 1771 | |
| 1772 | #endif |
| 1773 | |
| 1774 | #ifdef CONFIG_SMP |
| 1775 | extern int set_cpus_allowed_ptr(struct task_struct *p, |
| 1776 | const struct cpumask *new_mask); |
| 1777 | #else |
| 1778 | static inline int set_cpus_allowed_ptr(struct task_struct *p, |
| 1779 | const struct cpumask *new_mask) |
| 1780 | { |
| 1781 | if (!cpumask_test_cpu(0, new_mask)) |
| 1782 | return -EINVAL; |
| 1783 | return 0; |
| 1784 | } |
| 1785 | #endif |
| 1786 | |
| 1787 | #ifndef CONFIG_CPUMASK_OFFSTACK |
| 1788 | static inline int set_cpus_allowed(struct task_struct *p, cpumask_t new_mask) |
| 1789 | { |
| 1790 | return set_cpus_allowed_ptr(p, &new_mask); |
| 1791 | } |
| 1792 | #endif |
| 1793 | |
| 1794 | /* |
| 1795 | * Architectures can set this to 1 if they have specified |
| 1796 | * CONFIG_HAVE_UNSTABLE_SCHED_CLOCK in their arch Kconfig, |
| 1797 | * but then during bootup it turns out that sched_clock() |
| 1798 | * is reliable after all: |
| 1799 | */ |
| 1800 | #ifdef CONFIG_HAVE_UNSTABLE_SCHED_CLOCK |
| 1801 | extern int sched_clock_stable; |
| 1802 | #endif |
| 1803 | |
| 1804 | /* ftrace calls sched_clock() directly */ |
| 1805 | extern unsigned long long notrace sched_clock(void); |
| 1806 | |
| 1807 | extern void sched_clock_init(void); |
| 1808 | extern u64 sched_clock_cpu(int cpu); |
| 1809 | |
| 1810 | #ifndef CONFIG_HAVE_UNSTABLE_SCHED_CLOCK |
| 1811 | static inline void sched_clock_tick(void) |
| 1812 | { |
| 1813 | } |
| 1814 | |
| 1815 | static inline void sched_clock_idle_sleep_event(void) |
| 1816 | { |
| 1817 | } |
| 1818 | |
| 1819 | static inline void sched_clock_idle_wakeup_event(u64 delta_ns) |
| 1820 | { |
| 1821 | } |
| 1822 | #else |
| 1823 | extern void sched_clock_tick(void); |
| 1824 | extern void sched_clock_idle_sleep_event(void); |
| 1825 | extern void sched_clock_idle_wakeup_event(u64 delta_ns); |
| 1826 | #endif |
| 1827 | |
| 1828 | /* |
| 1829 | * For kernel-internal use: high-speed (but slightly incorrect) per-cpu |
| 1830 | * clock constructed from sched_clock(): |
| 1831 | */ |
| 1832 | extern unsigned long long cpu_clock(int cpu); |
| 1833 | |
| 1834 | extern unsigned long long |
| 1835 | task_sched_runtime(struct task_struct *task); |
| 1836 | extern unsigned long long thread_group_sched_runtime(struct task_struct *task); |
| 1837 | |
| 1838 | /* sched_exec is called by processes performing an exec */ |
| 1839 | #ifdef CONFIG_SMP |
| 1840 | extern void sched_exec(void); |
| 1841 | #else |
| 1842 | #define sched_exec() {} |
| 1843 | #endif |
| 1844 | |
| 1845 | extern void sched_clock_idle_sleep_event(void); |
| 1846 | extern void sched_clock_idle_wakeup_event(u64 delta_ns); |
| 1847 | |
| 1848 | #ifdef CONFIG_HOTPLUG_CPU |
| 1849 | extern void idle_task_exit(void); |
| 1850 | #else |
| 1851 | static inline void idle_task_exit(void) {} |
| 1852 | #endif |
| 1853 | |
| 1854 | extern void sched_idle_next(void); |
| 1855 | |
| 1856 | #if defined(CONFIG_NO_HZ) && defined(CONFIG_SMP) |
| 1857 | extern void wake_up_idle_cpu(int cpu); |
| 1858 | #else |
| 1859 | static inline void wake_up_idle_cpu(int cpu) { } |
| 1860 | #endif |
| 1861 | |
| 1862 | extern unsigned int sysctl_sched_latency; |
| 1863 | extern unsigned int sysctl_sched_min_granularity; |
| 1864 | extern unsigned int sysctl_sched_wakeup_granularity; |
| 1865 | extern unsigned int sysctl_sched_shares_ratelimit; |
| 1866 | extern unsigned int sysctl_sched_shares_thresh; |
| 1867 | extern unsigned int sysctl_sched_child_runs_first; |
| 1868 | |
| 1869 | enum sched_tunable_scaling { |
| 1870 | SCHED_TUNABLESCALING_NONE, |
| 1871 | SCHED_TUNABLESCALING_LOG, |
| 1872 | SCHED_TUNABLESCALING_LINEAR, |
| 1873 | SCHED_TUNABLESCALING_END, |
| 1874 | }; |
| 1875 | extern enum sched_tunable_scaling sysctl_sched_tunable_scaling; |
| 1876 | |
| 1877 | #ifdef CONFIG_SCHED_DEBUG |
| 1878 | extern unsigned int sysctl_sched_migration_cost; |
| 1879 | extern unsigned int sysctl_sched_nr_migrate; |
| 1880 | extern unsigned int sysctl_sched_time_avg; |
| 1881 | extern unsigned int sysctl_timer_migration; |
| 1882 | |
| 1883 | int sched_proc_update_handler(struct ctl_table *table, int write, |
| 1884 | void __user *buffer, size_t *length, |
| 1885 | loff_t *ppos); |
| 1886 | #endif |
| 1887 | #ifdef CONFIG_SCHED_DEBUG |
| 1888 | static inline unsigned int get_sysctl_timer_migration(void) |
| 1889 | { |
| 1890 | return sysctl_timer_migration; |
| 1891 | } |
| 1892 | #else |
| 1893 | static inline unsigned int get_sysctl_timer_migration(void) |
| 1894 | { |
| 1895 | return 1; |
| 1896 | } |
| 1897 | #endif |
| 1898 | extern unsigned int sysctl_sched_rt_period; |
| 1899 | extern int sysctl_sched_rt_runtime; |
| 1900 | |
| 1901 | int sched_rt_handler(struct ctl_table *table, int write, |
| 1902 | void __user *buffer, size_t *lenp, |
| 1903 | loff_t *ppos); |
| 1904 | |
| 1905 | extern unsigned int sysctl_sched_compat_yield; |
| 1906 | |
| 1907 | #ifdef CONFIG_RT_MUTEXES |
| 1908 | extern int rt_mutex_getprio(struct task_struct *p); |
| 1909 | extern void rt_mutex_setprio(struct task_struct *p, int prio); |
| 1910 | extern void rt_mutex_adjust_pi(struct task_struct *p); |
| 1911 | #else |
| 1912 | static inline int rt_mutex_getprio(struct task_struct *p) |
| 1913 | { |
| 1914 | return p->normal_prio; |
| 1915 | } |
| 1916 | # define rt_mutex_adjust_pi(p) do { } while (0) |
| 1917 | #endif |
| 1918 | |
| 1919 | extern void set_user_nice(struct task_struct *p, long nice); |
| 1920 | extern int task_prio(const struct task_struct *p); |
| 1921 | extern int task_nice(const struct task_struct *p); |
| 1922 | extern int can_nice(const struct task_struct *p, const int nice); |
| 1923 | extern int task_curr(const struct task_struct *p); |
| 1924 | extern int idle_cpu(int cpu); |
| 1925 | extern int sched_setscheduler(struct task_struct *, int, struct sched_param *); |
| 1926 | extern int sched_setscheduler_nocheck(struct task_struct *, int, |
| 1927 | struct sched_param *); |
| 1928 | extern struct task_struct *idle_task(int cpu); |
| 1929 | extern struct task_struct *curr_task(int cpu); |
| 1930 | extern void set_curr_task(int cpu, struct task_struct *p); |
| 1931 | |
| 1932 | void yield(void); |
| 1933 | |
| 1934 | /* |
| 1935 | * The default (Linux) execution domain. |
| 1936 | */ |
| 1937 | extern struct exec_domain default_exec_domain; |
| 1938 | |
| 1939 | union thread_union { |
| 1940 | struct thread_info thread_info; |
| 1941 | unsigned long stack[THREAD_SIZE/sizeof(long)]; |
| 1942 | }; |
| 1943 | |
| 1944 | #ifndef __HAVE_ARCH_KSTACK_END |
| 1945 | static inline int kstack_end(void *addr) |
| 1946 | { |
| 1947 | /* Reliable end of stack detection: |
| 1948 | * Some APM bios versions misalign the stack |
| 1949 | */ |
| 1950 | return !(((unsigned long)addr+sizeof(void*)-1) & (THREAD_SIZE-sizeof(void*))); |
| 1951 | } |
| 1952 | #endif |
| 1953 | |
| 1954 | extern union thread_union init_thread_union; |
| 1955 | extern struct task_struct init_task; |
| 1956 | |
| 1957 | extern struct mm_struct init_mm; |
| 1958 | |
| 1959 | extern struct pid_namespace init_pid_ns; |
| 1960 | |
| 1961 | /* |
| 1962 | * find a task by one of its numerical ids |
| 1963 | * |
| 1964 | * find_task_by_pid_ns(): |
| 1965 | * finds a task by its pid in the specified namespace |
| 1966 | * find_task_by_vpid(): |
| 1967 | * finds a task by its virtual pid |
| 1968 | * |
| 1969 | * see also find_vpid() etc in include/linux/pid.h |
| 1970 | */ |
| 1971 | |
| 1972 | extern struct task_struct *find_task_by_vpid(pid_t nr); |
| 1973 | extern struct task_struct *find_task_by_pid_ns(pid_t nr, |
| 1974 | struct pid_namespace *ns); |
| 1975 | |
| 1976 | extern void __set_special_pids(struct pid *pid); |
| 1977 | |
| 1978 | /* per-UID process charging. */ |
| 1979 | extern struct user_struct * alloc_uid(struct user_namespace *, uid_t); |
| 1980 | static inline struct user_struct *get_uid(struct user_struct *u) |
| 1981 | { |
| 1982 | atomic_inc(&u->__count); |
| 1983 | return u; |
| 1984 | } |
| 1985 | extern void free_uid(struct user_struct *); |
| 1986 | extern void release_uids(struct user_namespace *ns); |
| 1987 | |
| 1988 | #include <asm/current.h> |
| 1989 | |
| 1990 | extern void do_timer(unsigned long ticks); |
| 1991 | |
| 1992 | extern int wake_up_state(struct task_struct *tsk, unsigned int state); |
| 1993 | extern int wake_up_process(struct task_struct *tsk); |
| 1994 | extern void wake_up_new_task(struct task_struct *tsk, |
| 1995 | unsigned long clone_flags); |
| 1996 | #ifdef CONFIG_SMP |
| 1997 | extern void kick_process(struct task_struct *tsk); |
| 1998 | #else |
| 1999 | static inline void kick_process(struct task_struct *tsk) { } |
| 2000 | #endif |
| 2001 | extern void sched_fork(struct task_struct *p, int clone_flags); |
| 2002 | extern void sched_dead(struct task_struct *p); |
| 2003 | |
| 2004 | extern void proc_caches_init(void); |
| 2005 | extern void flush_signals(struct task_struct *); |
| 2006 | extern void __flush_signals(struct task_struct *); |
| 2007 | extern void ignore_signals(struct task_struct *); |
| 2008 | extern void flush_signal_handlers(struct task_struct *, int force_default); |
| 2009 | extern int dequeue_signal(struct task_struct *tsk, sigset_t *mask, siginfo_t *info); |
| 2010 | |
| 2011 | static inline int dequeue_signal_lock(struct task_struct *tsk, sigset_t *mask, siginfo_t *info) |
| 2012 | { |
| 2013 | unsigned long flags; |
| 2014 | int ret; |
| 2015 | |
| 2016 | spin_lock_irqsave(&tsk->sighand->siglock, flags); |
| 2017 | ret = dequeue_signal(tsk, mask, info); |
| 2018 | spin_unlock_irqrestore(&tsk->sighand->siglock, flags); |
| 2019 | |
| 2020 | return ret; |
| 2021 | } |
| 2022 | |
| 2023 | extern void block_all_signals(int (*notifier)(void *priv), void *priv, |
| 2024 | sigset_t *mask); |
| 2025 | extern void unblock_all_signals(void); |
| 2026 | extern void release_task(struct task_struct * p); |
| 2027 | extern int send_sig_info(int, struct siginfo *, struct task_struct *); |
| 2028 | extern int force_sigsegv(int, struct task_struct *); |
| 2029 | extern int force_sig_info(int, struct siginfo *, struct task_struct *); |
| 2030 | extern int __kill_pgrp_info(int sig, struct siginfo *info, struct pid *pgrp); |
| 2031 | extern int kill_pid_info(int sig, struct siginfo *info, struct pid *pid); |
| 2032 | extern int kill_pid_info_as_uid(int, struct siginfo *, struct pid *, uid_t, uid_t, u32); |
| 2033 | extern int kill_pgrp(struct pid *pid, int sig, int priv); |
| 2034 | extern int kill_pid(struct pid *pid, int sig, int priv); |
| 2035 | extern int kill_proc_info(int, struct siginfo *, pid_t); |
| 2036 | extern int do_notify_parent(struct task_struct *, int); |
| 2037 | extern void __wake_up_parent(struct task_struct *p, struct task_struct *parent); |
| 2038 | extern void force_sig(int, struct task_struct *); |
| 2039 | extern int send_sig(int, struct task_struct *, int); |
| 2040 | extern void zap_other_threads(struct task_struct *p); |
| 2041 | extern struct sigqueue *sigqueue_alloc(void); |
| 2042 | extern void sigqueue_free(struct sigqueue *); |
| 2043 | extern int send_sigqueue(struct sigqueue *, struct task_struct *, int group); |
| 2044 | extern int do_sigaction(int, struct k_sigaction *, struct k_sigaction *); |
| 2045 | extern int do_sigaltstack(const stack_t __user *, stack_t __user *, unsigned long); |
| 2046 | |
| 2047 | static inline int kill_cad_pid(int sig, int priv) |
| 2048 | { |
| 2049 | return kill_pid(cad_pid, sig, priv); |
| 2050 | } |
| 2051 | |
| 2052 | /* These can be the second arg to send_sig_info/send_group_sig_info. */ |
| 2053 | #define SEND_SIG_NOINFO ((struct siginfo *) 0) |
| 2054 | #define SEND_SIG_PRIV ((struct siginfo *) 1) |
| 2055 | #define SEND_SIG_FORCED ((struct siginfo *) 2) |
| 2056 | |
| 2057 | /* |
| 2058 | * True if we are on the alternate signal stack. |
| 2059 | */ |
| 2060 | static inline int on_sig_stack(unsigned long sp) |
| 2061 | { |
| 2062 | #ifdef CONFIG_STACK_GROWSUP |
| 2063 | return sp >= current->sas_ss_sp && |
| 2064 | sp - current->sas_ss_sp < current->sas_ss_size; |
| 2065 | #else |
| 2066 | return sp > current->sas_ss_sp && |
| 2067 | sp - current->sas_ss_sp <= current->sas_ss_size; |
| 2068 | #endif |
| 2069 | } |
| 2070 | |
| 2071 | static inline int sas_ss_flags(unsigned long sp) |
| 2072 | { |
| 2073 | return (current->sas_ss_size == 0 ? SS_DISABLE |
| 2074 | : on_sig_stack(sp) ? SS_ONSTACK : 0); |
| 2075 | } |
| 2076 | |
| 2077 | /* |
| 2078 | * Routines for handling mm_structs |
| 2079 | */ |
| 2080 | extern struct mm_struct * mm_alloc(void); |
| 2081 | |
| 2082 | /* mmdrop drops the mm and the page tables */ |
| 2083 | extern void __mmdrop(struct mm_struct *); |
| 2084 | static inline void mmdrop(struct mm_struct * mm) |
| 2085 | { |
| 2086 | if (unlikely(atomic_dec_and_test(&mm->mm_count))) |
| 2087 | __mmdrop(mm); |
| 2088 | } |
| 2089 | |
| 2090 | /* mmput gets rid of the mappings and all user-space */ |
| 2091 | extern void mmput(struct mm_struct *); |
| 2092 | /* Grab a reference to a task's mm, if it is not already going away */ |
| 2093 | extern struct mm_struct *get_task_mm(struct task_struct *task); |
| 2094 | /* Remove the current tasks stale references to the old mm_struct */ |
| 2095 | extern void mm_release(struct task_struct *, struct mm_struct *); |
| 2096 | /* Allocate a new mm structure and copy contents from tsk->mm */ |
| 2097 | extern struct mm_struct *dup_mm(struct task_struct *tsk); |
| 2098 | |
| 2099 | extern int copy_thread(unsigned long, unsigned long, unsigned long, |
| 2100 | struct task_struct *, struct pt_regs *); |
| 2101 | extern void flush_thread(void); |
| 2102 | extern void exit_thread(void); |
| 2103 | |
| 2104 | extern void exit_files(struct task_struct *); |
| 2105 | extern void __cleanup_signal(struct signal_struct *); |
| 2106 | extern void __cleanup_sighand(struct sighand_struct *); |
| 2107 | |
| 2108 | extern void exit_itimers(struct signal_struct *); |
| 2109 | extern void flush_itimer_signals(void); |
| 2110 | |
| 2111 | extern NORET_TYPE void do_group_exit(int); |
| 2112 | |
| 2113 | extern void daemonize(const char *, ...); |
| 2114 | extern int allow_signal(int); |
| 2115 | extern int disallow_signal(int); |
| 2116 | |
| 2117 | extern int do_execve(char *, char __user * __user *, char __user * __user *, struct pt_regs *); |
| 2118 | extern long do_fork(unsigned long, unsigned long, struct pt_regs *, unsigned long, int __user *, int __user *); |
| 2119 | struct task_struct *fork_idle(int); |
| 2120 | |
| 2121 | extern void set_task_comm(struct task_struct *tsk, char *from); |
| 2122 | extern char *get_task_comm(char *to, struct task_struct *tsk); |
| 2123 | |
| 2124 | #ifdef CONFIG_SMP |
| 2125 | extern void wait_task_context_switch(struct task_struct *p); |
| 2126 | extern unsigned long wait_task_inactive(struct task_struct *, long match_state); |
| 2127 | #else |
| 2128 | static inline void wait_task_context_switch(struct task_struct *p) {} |
| 2129 | static inline unsigned long wait_task_inactive(struct task_struct *p, |
| 2130 | long match_state) |
| 2131 | { |
| 2132 | return 1; |
| 2133 | } |
| 2134 | #endif |
| 2135 | |
| 2136 | #define next_task(p) \ |
| 2137 | list_entry_rcu((p)->tasks.next, struct task_struct, tasks) |
| 2138 | |
| 2139 | #define for_each_process(p) \ |
| 2140 | for (p = &init_task ; (p = next_task(p)) != &init_task ; ) |
| 2141 | |
| 2142 | extern bool current_is_single_threaded(void); |
| 2143 | |
| 2144 | /* |
| 2145 | * Careful: do_each_thread/while_each_thread is a double loop so |
| 2146 | * 'break' will not work as expected - use goto instead. |
| 2147 | */ |
| 2148 | #define do_each_thread(g, t) \ |
| 2149 | for (g = t = &init_task ; (g = t = next_task(g)) != &init_task ; ) do |
| 2150 | |
| 2151 | #define while_each_thread(g, t) \ |
| 2152 | while ((t = next_thread(t)) != g) |
| 2153 | |
| 2154 | /* de_thread depends on thread_group_leader not being a pid based check */ |
| 2155 | #define thread_group_leader(p) (p == p->group_leader) |
| 2156 | |
| 2157 | /* Do to the insanities of de_thread it is possible for a process |
| 2158 | * to have the pid of the thread group leader without actually being |
| 2159 | * the thread group leader. For iteration through the pids in proc |
| 2160 | * all we care about is that we have a task with the appropriate |
| 2161 | * pid, we don't actually care if we have the right task. |
| 2162 | */ |
| 2163 | static inline int has_group_leader_pid(struct task_struct *p) |
| 2164 | { |
| 2165 | return p->pid == p->tgid; |
| 2166 | } |
| 2167 | |
| 2168 | static inline |
| 2169 | int same_thread_group(struct task_struct *p1, struct task_struct *p2) |
| 2170 | { |
| 2171 | return p1->tgid == p2->tgid; |
| 2172 | } |
| 2173 | |
| 2174 | static inline struct task_struct *next_thread(const struct task_struct *p) |
| 2175 | { |
| 2176 | return list_entry_rcu(p->thread_group.next, |
| 2177 | struct task_struct, thread_group); |
| 2178 | } |
| 2179 | |
| 2180 | static inline int thread_group_empty(struct task_struct *p) |
| 2181 | { |
| 2182 | return list_empty(&p->thread_group); |
| 2183 | } |
| 2184 | |
| 2185 | #define delay_group_leader(p) \ |
| 2186 | (thread_group_leader(p) && !thread_group_empty(p)) |
| 2187 | |
| 2188 | static inline int task_detached(struct task_struct *p) |
| 2189 | { |
| 2190 | return p->exit_signal == -1; |
| 2191 | } |
| 2192 | |
| 2193 | /* |
| 2194 | * Protects ->fs, ->files, ->mm, ->group_info, ->comm, keyring |
| 2195 | * subscriptions and synchronises with wait4(). Also used in procfs. Also |
| 2196 | * pins the final release of task.io_context. Also protects ->cpuset and |
| 2197 | * ->cgroup.subsys[]. |
| 2198 | * |
| 2199 | * Nests both inside and outside of read_lock(&tasklist_lock). |
| 2200 | * It must not be nested with write_lock_irq(&tasklist_lock), |
| 2201 | * neither inside nor outside. |
| 2202 | */ |
| 2203 | static inline void task_lock(struct task_struct *p) |
| 2204 | { |
| 2205 | spin_lock(&p->alloc_lock); |
| 2206 | } |
| 2207 | |
| 2208 | static inline void task_unlock(struct task_struct *p) |
| 2209 | { |
| 2210 | spin_unlock(&p->alloc_lock); |
| 2211 | } |
| 2212 | |
| 2213 | extern struct sighand_struct *lock_task_sighand(struct task_struct *tsk, |
| 2214 | unsigned long *flags); |
| 2215 | |
| 2216 | static inline void unlock_task_sighand(struct task_struct *tsk, |
| 2217 | unsigned long *flags) |
| 2218 | { |
| 2219 | spin_unlock_irqrestore(&tsk->sighand->siglock, *flags); |
| 2220 | } |
| 2221 | |
| 2222 | #ifndef __HAVE_THREAD_FUNCTIONS |
| 2223 | |
| 2224 | #define task_thread_info(task) ((struct thread_info *)(task)->stack) |
| 2225 | #define task_stack_page(task) ((task)->stack) |
| 2226 | |
| 2227 | static inline void setup_thread_stack(struct task_struct *p, struct task_struct *org) |
| 2228 | { |
| 2229 | *task_thread_info(p) = *task_thread_info(org); |
| 2230 | task_thread_info(p)->task = p; |
| 2231 | } |
| 2232 | |
| 2233 | static inline unsigned long *end_of_stack(struct task_struct *p) |
| 2234 | { |
| 2235 | return (unsigned long *)(task_thread_info(p) + 1); |
| 2236 | } |
| 2237 | |
| 2238 | #endif |
| 2239 | |
| 2240 | static inline int object_is_on_stack(void *obj) |
| 2241 | { |
| 2242 | void *stack = task_stack_page(current); |
| 2243 | |
| 2244 | return (obj >= stack) && (obj < (stack + THREAD_SIZE)); |
| 2245 | } |
| 2246 | |
| 2247 | extern void thread_info_cache_init(void); |
| 2248 | |
| 2249 | #ifdef CONFIG_DEBUG_STACK_USAGE |
| 2250 | static inline unsigned long stack_not_used(struct task_struct *p) |
| 2251 | { |
| 2252 | unsigned long *n = end_of_stack(p); |
| 2253 | |
| 2254 | do { /* Skip over canary */ |
| 2255 | n++; |
| 2256 | } while (!*n); |
| 2257 | |
| 2258 | return (unsigned long)n - (unsigned long)end_of_stack(p); |
| 2259 | } |
| 2260 | #endif |
| 2261 | |
| 2262 | /* set thread flags in other task's structures |
| 2263 | * - see asm/thread_info.h for TIF_xxxx flags available |
| 2264 | */ |
| 2265 | static inline void set_tsk_thread_flag(struct task_struct *tsk, int flag) |
| 2266 | { |
| 2267 | set_ti_thread_flag(task_thread_info(tsk), flag); |
| 2268 | } |
| 2269 | |
| 2270 | static inline void clear_tsk_thread_flag(struct task_struct *tsk, int flag) |
| 2271 | { |
| 2272 | clear_ti_thread_flag(task_thread_info(tsk), flag); |
| 2273 | } |
| 2274 | |
| 2275 | static inline int test_and_set_tsk_thread_flag(struct task_struct *tsk, int flag) |
| 2276 | { |
| 2277 | return test_and_set_ti_thread_flag(task_thread_info(tsk), flag); |
| 2278 | } |
| 2279 | |
| 2280 | static inline int test_and_clear_tsk_thread_flag(struct task_struct *tsk, int flag) |
| 2281 | { |
| 2282 | return test_and_clear_ti_thread_flag(task_thread_info(tsk), flag); |
| 2283 | } |
| 2284 | |
| 2285 | static inline int test_tsk_thread_flag(struct task_struct *tsk, int flag) |
| 2286 | { |
| 2287 | return test_ti_thread_flag(task_thread_info(tsk), flag); |
| 2288 | } |
| 2289 | |
| 2290 | static inline void set_tsk_need_resched(struct task_struct *tsk) |
| 2291 | { |
| 2292 | set_tsk_thread_flag(tsk,TIF_NEED_RESCHED); |
| 2293 | } |
| 2294 | |
| 2295 | static inline void clear_tsk_need_resched(struct task_struct *tsk) |
| 2296 | { |
| 2297 | clear_tsk_thread_flag(tsk,TIF_NEED_RESCHED); |
| 2298 | } |
| 2299 | |
| 2300 | static inline int test_tsk_need_resched(struct task_struct *tsk) |
| 2301 | { |
| 2302 | return unlikely(test_tsk_thread_flag(tsk,TIF_NEED_RESCHED)); |
| 2303 | } |
| 2304 | |
| 2305 | static inline int restart_syscall(void) |
| 2306 | { |
| 2307 | set_tsk_thread_flag(current, TIF_SIGPENDING); |
| 2308 | return -ERESTARTNOINTR; |
| 2309 | } |
| 2310 | |
| 2311 | static inline int signal_pending(struct task_struct *p) |
| 2312 | { |
| 2313 | return unlikely(test_tsk_thread_flag(p,TIF_SIGPENDING)); |
| 2314 | } |
| 2315 | |
| 2316 | static inline int __fatal_signal_pending(struct task_struct *p) |
| 2317 | { |
| 2318 | return unlikely(sigismember(&p->pending.signal, SIGKILL)); |
| 2319 | } |
| 2320 | |
| 2321 | static inline int fatal_signal_pending(struct task_struct *p) |
| 2322 | { |
| 2323 | return signal_pending(p) && __fatal_signal_pending(p); |
| 2324 | } |
| 2325 | |
| 2326 | static inline int signal_pending_state(long state, struct task_struct *p) |
| 2327 | { |
| 2328 | if (!(state & (TASK_INTERRUPTIBLE | TASK_WAKEKILL))) |
| 2329 | return 0; |
| 2330 | if (!signal_pending(p)) |
| 2331 | return 0; |
| 2332 | |
| 2333 | return (state & TASK_INTERRUPTIBLE) || __fatal_signal_pending(p); |
| 2334 | } |
| 2335 | |
| 2336 | static inline int need_resched(void) |
| 2337 | { |
| 2338 | return unlikely(test_thread_flag(TIF_NEED_RESCHED)); |
| 2339 | } |
| 2340 | |
| 2341 | /* |
| 2342 | * cond_resched() and cond_resched_lock(): latency reduction via |
| 2343 | * explicit rescheduling in places that are safe. The return |
| 2344 | * value indicates whether a reschedule was done in fact. |
| 2345 | * cond_resched_lock() will drop the spinlock before scheduling, |
| 2346 | * cond_resched_softirq() will enable bhs before scheduling. |
| 2347 | */ |
| 2348 | extern int _cond_resched(void); |
| 2349 | |
| 2350 | #define cond_resched() ({ \ |
| 2351 | __might_sleep(__FILE__, __LINE__, 0); \ |
| 2352 | _cond_resched(); \ |
| 2353 | }) |
| 2354 | |
| 2355 | extern int __cond_resched_lock(spinlock_t *lock); |
| 2356 | |
| 2357 | #ifdef CONFIG_PREEMPT |
| 2358 | #define PREEMPT_LOCK_OFFSET PREEMPT_OFFSET |
| 2359 | #else |
| 2360 | #define PREEMPT_LOCK_OFFSET 0 |
| 2361 | #endif |
| 2362 | |
| 2363 | #define cond_resched_lock(lock) ({ \ |
| 2364 | __might_sleep(__FILE__, __LINE__, PREEMPT_LOCK_OFFSET); \ |
| 2365 | __cond_resched_lock(lock); \ |
| 2366 | }) |
| 2367 | |
| 2368 | extern int __cond_resched_softirq(void); |
| 2369 | |
| 2370 | #define cond_resched_softirq() ({ \ |
| 2371 | __might_sleep(__FILE__, __LINE__, SOFTIRQ_OFFSET); \ |
| 2372 | __cond_resched_softirq(); \ |
| 2373 | }) |
| 2374 | |
| 2375 | /* |
| 2376 | * Does a critical section need to be broken due to another |
| 2377 | * task waiting?: (technically does not depend on CONFIG_PREEMPT, |
| 2378 | * but a general need for low latency) |
| 2379 | */ |
| 2380 | static inline int spin_needbreak(spinlock_t *lock) |
| 2381 | { |
| 2382 | #ifdef CONFIG_PREEMPT |
| 2383 | return spin_is_contended(lock); |
| 2384 | #else |
| 2385 | return 0; |
| 2386 | #endif |
| 2387 | } |
| 2388 | |
| 2389 | /* |
| 2390 | * Thread group CPU time accounting. |
| 2391 | */ |
| 2392 | void thread_group_cputime(struct task_struct *tsk, struct task_cputime *times); |
| 2393 | void thread_group_cputimer(struct task_struct *tsk, struct task_cputime *times); |
| 2394 | |
| 2395 | static inline void thread_group_cputime_init(struct signal_struct *sig) |
| 2396 | { |
| 2397 | spin_lock_init(&sig->cputimer.lock); |
| 2398 | } |
| 2399 | |
| 2400 | static inline void thread_group_cputime_free(struct signal_struct *sig) |
| 2401 | { |
| 2402 | } |
| 2403 | |
| 2404 | /* |
| 2405 | * Reevaluate whether the task has signals pending delivery. |
| 2406 | * Wake the task if so. |
| 2407 | * This is required every time the blocked sigset_t changes. |
| 2408 | * callers must hold sighand->siglock. |
| 2409 | */ |
| 2410 | extern void recalc_sigpending_and_wake(struct task_struct *t); |
| 2411 | extern void recalc_sigpending(void); |
| 2412 | |
| 2413 | extern void signal_wake_up(struct task_struct *t, int resume_stopped); |
| 2414 | |
| 2415 | /* |
| 2416 | * Wrappers for p->thread_info->cpu access. No-op on UP. |
| 2417 | */ |
| 2418 | #ifdef CONFIG_SMP |
| 2419 | |
| 2420 | static inline unsigned int task_cpu(const struct task_struct *p) |
| 2421 | { |
| 2422 | return task_thread_info(p)->cpu; |
| 2423 | } |
| 2424 | |
| 2425 | extern void set_task_cpu(struct task_struct *p, unsigned int cpu); |
| 2426 | |
| 2427 | #else |
| 2428 | |
| 2429 | static inline unsigned int task_cpu(const struct task_struct *p) |
| 2430 | { |
| 2431 | return 0; |
| 2432 | } |
| 2433 | |
| 2434 | static inline void set_task_cpu(struct task_struct *p, unsigned int cpu) |
| 2435 | { |
| 2436 | } |
| 2437 | |
| 2438 | #endif /* CONFIG_SMP */ |
| 2439 | |
| 2440 | #ifdef CONFIG_TRACING |
| 2441 | extern void |
| 2442 | __trace_special(void *__tr, void *__data, |
| 2443 | unsigned long arg1, unsigned long arg2, unsigned long arg3); |
| 2444 | #else |
| 2445 | static inline void |
| 2446 | __trace_special(void *__tr, void *__data, |
| 2447 | unsigned long arg1, unsigned long arg2, unsigned long arg3) |
| 2448 | { |
| 2449 | } |
| 2450 | #endif |
| 2451 | |
| 2452 | extern long sched_setaffinity(pid_t pid, const struct cpumask *new_mask); |
| 2453 | extern long sched_getaffinity(pid_t pid, struct cpumask *mask); |
| 2454 | |
| 2455 | extern void normalize_rt_tasks(void); |
| 2456 | |
| 2457 | #ifdef CONFIG_CGROUP_SCHED |
| 2458 | |
| 2459 | extern struct task_group init_task_group; |
| 2460 | |
| 2461 | extern struct task_group *sched_create_group(struct task_group *parent); |
| 2462 | extern void sched_destroy_group(struct task_group *tg); |
| 2463 | extern void sched_move_task(struct task_struct *tsk); |
| 2464 | #ifdef CONFIG_FAIR_GROUP_SCHED |
| 2465 | extern int sched_group_set_shares(struct task_group *tg, unsigned long shares); |
| 2466 | extern unsigned long sched_group_shares(struct task_group *tg); |
| 2467 | #endif |
| 2468 | #ifdef CONFIG_RT_GROUP_SCHED |
| 2469 | extern int sched_group_set_rt_runtime(struct task_group *tg, |
| 2470 | long rt_runtime_us); |
| 2471 | extern long sched_group_rt_runtime(struct task_group *tg); |
| 2472 | extern int sched_group_set_rt_period(struct task_group *tg, |
| 2473 | long rt_period_us); |
| 2474 | extern long sched_group_rt_period(struct task_group *tg); |
| 2475 | extern int sched_rt_can_attach(struct task_group *tg, struct task_struct *tsk); |
| 2476 | #endif |
| 2477 | #endif |
| 2478 | |
| 2479 | extern int task_can_switch_user(struct user_struct *up, |
| 2480 | struct task_struct *tsk); |
| 2481 | |
| 2482 | #ifdef CONFIG_TASK_XACCT |
| 2483 | static inline void add_rchar(struct task_struct *tsk, ssize_t amt) |
| 2484 | { |
| 2485 | tsk->ioac.rchar += amt; |
| 2486 | } |
| 2487 | |
| 2488 | static inline void add_wchar(struct task_struct *tsk, ssize_t amt) |
| 2489 | { |
| 2490 | tsk->ioac.wchar += amt; |
| 2491 | } |
| 2492 | |
| 2493 | static inline void inc_syscr(struct task_struct *tsk) |
| 2494 | { |
| 2495 | tsk->ioac.syscr++; |
| 2496 | } |
| 2497 | |
| 2498 | static inline void inc_syscw(struct task_struct *tsk) |
| 2499 | { |
| 2500 | tsk->ioac.syscw++; |
| 2501 | } |
| 2502 | #else |
| 2503 | static inline void add_rchar(struct task_struct *tsk, ssize_t amt) |
| 2504 | { |
| 2505 | } |
| 2506 | |
| 2507 | static inline void add_wchar(struct task_struct *tsk, ssize_t amt) |
| 2508 | { |
| 2509 | } |
| 2510 | |
| 2511 | static inline void inc_syscr(struct task_struct *tsk) |
| 2512 | { |
| 2513 | } |
| 2514 | |
| 2515 | static inline void inc_syscw(struct task_struct *tsk) |
| 2516 | { |
| 2517 | } |
| 2518 | #endif |
| 2519 | |
| 2520 | #ifndef TASK_SIZE_OF |
| 2521 | #define TASK_SIZE_OF(tsk) TASK_SIZE |
| 2522 | #endif |
| 2523 | |
| 2524 | /* |
| 2525 | * Call the function if the target task is executing on a CPU right now: |
| 2526 | */ |
| 2527 | extern void task_oncpu_function_call(struct task_struct *p, |
| 2528 | void (*func) (void *info), void *info); |
| 2529 | |
| 2530 | |
| 2531 | #ifdef CONFIG_MM_OWNER |
| 2532 | extern void mm_update_next_owner(struct mm_struct *mm); |
| 2533 | extern void mm_init_owner(struct mm_struct *mm, struct task_struct *p); |
| 2534 | #else |
| 2535 | static inline void mm_update_next_owner(struct mm_struct *mm) |
| 2536 | { |
| 2537 | } |
| 2538 | |
| 2539 | static inline void mm_init_owner(struct mm_struct *mm, struct task_struct *p) |
| 2540 | { |
| 2541 | } |
| 2542 | #endif /* CONFIG_MM_OWNER */ |
| 2543 | |
| 2544 | static inline unsigned long task_rlimit(const struct task_struct *tsk, |
| 2545 | unsigned int limit) |
| 2546 | { |
| 2547 | return ACCESS_ONCE(tsk->signal->rlim[limit].rlim_cur); |
| 2548 | } |
| 2549 | |
| 2550 | static inline unsigned long task_rlimit_max(const struct task_struct *tsk, |
| 2551 | unsigned int limit) |
| 2552 | { |
| 2553 | return ACCESS_ONCE(tsk->signal->rlim[limit].rlim_max); |
| 2554 | } |
| 2555 | |
| 2556 | static inline unsigned long rlimit(unsigned int limit) |
| 2557 | { |
| 2558 | return task_rlimit(current, limit); |
| 2559 | } |
| 2560 | |
| 2561 | static inline unsigned long rlimit_max(unsigned int limit) |
| 2562 | { |
| 2563 | return task_rlimit_max(current, limit); |
| 2564 | } |
| 2565 | |
| 2566 | #endif /* __KERNEL__ */ |
| 2567 | |
| 2568 | #endif |