1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1982, 1988, 1991, 1993 5 * The Regents of the University of California. All rights reserved. 6 * (c) UNIX System Laboratories, Inc. 7 * All or some portions of this file are derived from material licensed 8 * to the University of California by American Telephone and Telegraph 9 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 10 * the permission of UNIX System Laboratories, Inc. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 37 #ifndef _SYS_SYSTM_H_ 38 #define _SYS_SYSTM_H_ 39 40 #include <sys/types.h> 41 #include <sys/callout.h> 42 #include <sys/kassert.h> 43 #include <sys/queue.h> 44 #include <sys/stdint.h> /* for people using printf mainly */ 45 #include <machine/atomic.h> 46 #include <machine/cpufunc.h> 47 48 __NULLABILITY_PRAGMA_PUSH 49 50 #ifdef _KERNEL 51 extern int cold; /* nonzero if we are doing a cold boot */ 52 extern int suspend_blocked; /* block suspend due to pending shutdown */ 53 extern int rebooting; /* kern_reboot() has been called. */ 54 extern char version[]; /* system version */ 55 extern char compiler_version[]; /* compiler version */ 56 extern char copyright[]; /* system copyright */ 57 extern int kstack_pages; /* number of kernel stack pages */ 58 59 extern u_long pagesizes[]; /* supported page sizes */ 60 extern long physmem; /* physical memory */ 61 extern long realmem; /* 'real' memory */ 62 63 extern char *rootdevnames[2]; /* names of possible root devices */ 64 65 extern int boothowto; /* reboot flags, from console subsystem */ 66 extern int bootverbose; /* nonzero to print verbose messages */ 67 68 extern int maxusers; /* system tune hint */ 69 extern int ngroups_max; /* max # of supplemental groups */ 70 extern int vm_guest; /* Running as virtual machine guest? */ 71 72 extern u_long maxphys; /* max raw I/O transfer size */ 73 74 /* 75 * Detected virtual machine guest types. The intention is to expand 76 * and/or add to the VM_GUEST_VM type if specific VM functionality is 77 * ever implemented (e.g. vendor-specific paravirtualization features). 78 * Keep in sync with vm_guest_sysctl_names[]. 79 */ 80 enum VM_GUEST { VM_GUEST_NO = 0, VM_GUEST_VM, VM_GUEST_XEN, VM_GUEST_HV, 81 VM_GUEST_VMWARE, VM_GUEST_KVM, VM_GUEST_BHYVE, VM_GUEST_VBOX, 82 VM_GUEST_PARALLELS, VM_LAST }; 83 84 #endif /* KERNEL */ 85 86 /* 87 * Align variables. 88 */ 89 #define __read_mostly __section(".data.read_mostly") 90 #define __read_frequently __section(".data.read_frequently") 91 #define __exclusive_cache_line __aligned(CACHE_LINE_SIZE) \ 92 __section(".data.exclusive_cache_line") 93 #if defined(_STANDALONE) 94 struct ucred; 95 #endif 96 97 #ifdef _KERNEL 98 #include <sys/param.h> /* MAXCPU */ 99 #include <sys/pcpu.h> /* curthread */ 100 #include <sys/kpilite.h> 101 102 extern int osreldate; 103 104 extern const void *zero_region; /* address space maps to a zeroed page */ 105 106 extern int unmapped_buf_allowed; 107 108 #ifdef __LP64__ 109 #define IOSIZE_MAX iosize_max() 110 #define DEVFS_IOSIZE_MAX devfs_iosize_max() 111 #else 112 #define IOSIZE_MAX SSIZE_MAX 113 #define DEVFS_IOSIZE_MAX SSIZE_MAX 114 #endif 115 116 /* 117 * General function declarations. 118 */ 119 120 struct inpcb; 121 struct lock_object; 122 struct malloc_type; 123 struct mtx; 124 struct proc; 125 struct socket; 126 struct thread; 127 struct tty; 128 struct ucred; 129 struct uio; 130 struct _jmp_buf; 131 struct trapframe; 132 struct eventtimer; 133 134 int setjmp(struct _jmp_buf *) __returns_twice; 135 void longjmp(struct _jmp_buf *, int) __dead2; 136 int dumpstatus(vm_offset_t addr, off_t count); 137 int nullop(void); 138 int eopnotsupp(void); 139 int ureadc(int, struct uio *); 140 void hashdestroy(void *, struct malloc_type *, u_long); 141 void *hashinit(int count, struct malloc_type *type, u_long *hashmask); 142 void *hashinit_flags(int count, struct malloc_type *type, 143 u_long *hashmask, int flags); 144 #define HASH_NOWAIT 0x00000001 145 #define HASH_WAITOK 0x00000002 146 147 void *phashinit(int count, struct malloc_type *type, u_long *nentries); 148 void *phashinit_flags(int count, struct malloc_type *type, u_long *nentries, 149 int flags); 150 151 void cpu_flush_dcache(void *, size_t); 152 void cpu_rootconf(void); 153 void critical_enter_KBI(void); 154 void critical_exit_KBI(void); 155 void critical_exit_preempt(void); 156 void init_param1(void); 157 void init_param2(long physpages); 158 void init_static_kenv(char *, size_t); 159 void tablefull(const char *); 160 161 /* 162 * Allocate per-thread "current" state in the linuxkpi 163 */ 164 extern int (*lkpi_alloc_current)(struct thread *, int); 165 int linux_alloc_current_noop(struct thread *, int); 166 167 #if (defined(KLD_MODULE) && !defined(KLD_TIED)) || defined(KTR_CRITICAL) || !defined(_KERNEL) || defined(GENOFFSET) 168 #define critical_enter() critical_enter_KBI() 169 #define critical_exit() critical_exit_KBI() 170 #else 171 static __inline void 172 critical_enter(void) 173 { 174 struct thread_lite *td; 175 176 td = (struct thread_lite *)curthread; 177 td->td_critnest++; 178 atomic_interrupt_fence(); 179 } 180 181 static __inline void 182 critical_exit(void) 183 { 184 struct thread_lite *td; 185 186 td = (struct thread_lite *)curthread; 187 KASSERT(td->td_critnest != 0, 188 ("critical_exit: td_critnest == 0")); 189 atomic_interrupt_fence(); 190 td->td_critnest--; 191 atomic_interrupt_fence(); 192 if (__predict_false(td->td_owepreempt)) 193 critical_exit_preempt(); 194 195 } 196 #endif 197 198 #ifdef EARLY_PRINTF 199 typedef void early_putc_t(int ch); 200 extern early_putc_t *early_putc; 201 #endif 202 int kvprintf(char const *, void (*)(int, void*), void *, int, 203 __va_list) __printflike(1, 0); 204 void log(int, const char *, ...) __printflike(2, 3); 205 void log_console(struct uio *); 206 void vlog(int, const char *, __va_list) __printflike(2, 0); 207 int asprintf(char **ret, struct malloc_type *mtp, const char *format, 208 ...) __printflike(3, 4); 209 int printf(const char *, ...) __printflike(1, 2); 210 int snprintf(char *, size_t, const char *, ...) __printflike(3, 4); 211 int sprintf(char *buf, const char *, ...) __printflike(2, 3); 212 int uprintf(const char *, ...) __printflike(1, 2); 213 int vprintf(const char *, __va_list) __printflike(1, 0); 214 int vasprintf(char **ret, struct malloc_type *mtp, const char *format, 215 __va_list ap) __printflike(3, 0); 216 int vsnprintf(char *, size_t, const char *, __va_list) __printflike(3, 0); 217 int vsnrprintf(char *, size_t, int, const char *, __va_list) __printflike(4, 0); 218 int vsprintf(char *buf, const char *, __va_list) __printflike(2, 0); 219 int sscanf(const char *, char const * _Nonnull, ...) __scanflike(2, 3); 220 int vsscanf(const char * _Nonnull, char const * _Nonnull, __va_list) __scanflike(2, 0); 221 long strtol(const char *, char **, int); 222 u_long strtoul(const char *, char **, int); 223 quad_t strtoq(const char *, char **, int); 224 u_quad_t strtouq(const char *, char **, int); 225 void tprintf(struct proc *p, int pri, const char *, ...) __printflike(3, 4); 226 void vtprintf(struct proc *, int, const char *, __va_list) __printflike(3, 0); 227 void hexdump(const void *ptr, int length, const char *hdr, int flags); 228 #define HD_COLUMN_MASK 0xff 229 #define HD_DELIM_MASK 0xff00 230 #define HD_OMIT_COUNT (1 << 16) 231 #define HD_OMIT_HEX (1 << 17) 232 #define HD_OMIT_CHARS (1 << 18) 233 234 #define ovbcopy(f, t, l) bcopy((f), (t), (l)) 235 void explicit_bzero(void * _Nonnull, size_t); 236 237 void *memset(void * _Nonnull buf, int c, size_t len); 238 void *memcpy(void * _Nonnull to, const void * _Nonnull from, size_t len); 239 void *memmove(void * _Nonnull dest, const void * _Nonnull src, size_t n); 240 int memcmp(const void *b1, const void *b2, size_t len); 241 242 #ifdef SAN_NEEDS_INTERCEPTORS 243 #define SAN_INTERCEPTOR(func) \ 244 __CONCAT(SAN_INTERCEPTOR_PREFIX, __CONCAT(_, func)) 245 void *SAN_INTERCEPTOR(memset)(void *, int, size_t); 246 void *SAN_INTERCEPTOR(memcpy)(void *, const void *, size_t); 247 void *SAN_INTERCEPTOR(memmove)(void *, const void *, size_t); 248 int SAN_INTERCEPTOR(memcmp)(const void *, const void *, size_t); 249 #ifndef SAN_RUNTIME 250 #define bcopy(from, to, len) SAN_INTERCEPTOR(memmove)((to), (from), (len)) 251 #define bzero(buf, len) SAN_INTERCEPTOR(memset)((buf), 0, (len)) 252 #define bcmp(b1, b2, len) SAN_INTERCEPTOR(memcmp)((b1), (b2), (len)) 253 #define memset(buf, c, len) SAN_INTERCEPTOR(memset)((buf), (c), (len)) 254 #define memcpy(to, from, len) SAN_INTERCEPTOR(memcpy)((to), (from), (len)) 255 #define memmove(dest, src, n) SAN_INTERCEPTOR(memmove)((dest), (src), (n)) 256 #define memcmp(b1, b2, len) SAN_INTERCEPTOR(memcmp)((b1), (b2), (len)) 257 #endif /* !SAN_RUNTIME */ 258 #else /* !SAN_NEEDS_INTERCEPTORS */ 259 #define bcopy(from, to, len) __builtin_memmove((to), (from), (len)) 260 #define bzero(buf, len) __builtin_memset((buf), 0, (len)) 261 #define bcmp(b1, b2, len) __builtin_memcmp((b1), (b2), (len)) 262 #define memset(buf, c, len) __builtin_memset((buf), (c), (len)) 263 #define memcpy(to, from, len) __builtin_memcpy((to), (from), (len)) 264 #define memmove(dest, src, n) __builtin_memmove((dest), (src), (n)) 265 #define memcmp(b1, b2, len) __builtin_memcmp((b1), (b2), (len)) 266 #endif /* SAN_NEEDS_INTERCEPTORS */ 267 268 void *memset_early(void * _Nonnull buf, int c, size_t len); 269 #define bzero_early(buf, len) memset_early((buf), 0, (len)) 270 void *memcpy_early(void * _Nonnull to, const void * _Nonnull from, size_t len); 271 void *memmove_early(void * _Nonnull dest, const void * _Nonnull src, size_t n); 272 #define bcopy_early(from, to, len) memmove_early((to), (from), (len)) 273 274 #define copystr(src, dst, len, outlen) ({ \ 275 size_t __r, __len, *__outlen; \ 276 \ 277 __len = (len); \ 278 __outlen = (outlen); \ 279 __r = strlcpy((dst), (src), __len); \ 280 if (__outlen != NULL) \ 281 *__outlen = ((__r >= __len) ? __len : __r + 1); \ 282 ((__r >= __len) ? ENAMETOOLONG : 0); \ 283 }) 284 285 int __result_use_check copyinstr(const void * __restrict udaddr, 286 void * _Nonnull __restrict kaddr, size_t len, 287 size_t * __restrict lencopied); 288 int __result_use_check copyin(const void * __restrict udaddr, 289 void * _Nonnull __restrict kaddr, size_t len); 290 int __result_use_check copyin_nofault(const void * __restrict udaddr, 291 void * _Nonnull __restrict kaddr, size_t len); 292 int __result_use_check copyout(const void * _Nonnull __restrict kaddr, 293 void * __restrict udaddr, size_t len); 294 int __result_use_check copyout_nofault(const void * _Nonnull __restrict kaddr, 295 void * __restrict udaddr, size_t len); 296 297 #ifdef SAN_NEEDS_INTERCEPTORS 298 int SAN_INTERCEPTOR(copyin)(const void *, void *, size_t); 299 int SAN_INTERCEPTOR(copyinstr)(const void *, void *, size_t, size_t *); 300 int SAN_INTERCEPTOR(copyout)(const void *, void *, size_t); 301 #ifndef SAN_RUNTIME 302 #define copyin(u, k, l) SAN_INTERCEPTOR(copyin)((u), (k), (l)) 303 #define copyinstr(u, k, l, lc) SAN_INTERCEPTOR(copyinstr)((u), (k), (l), (lc)) 304 #define copyout(k, u, l) SAN_INTERCEPTOR(copyout)((k), (u), (l)) 305 #endif /* !SAN_RUNTIME */ 306 #endif /* SAN_NEEDS_INTERCEPTORS */ 307 308 int fubyte(volatile const void *base); 309 long fuword(volatile const void *base); 310 int fuword16(volatile const void *base); 311 int32_t fuword32(volatile const void *base); 312 int64_t fuword64(volatile const void *base); 313 int __result_use_check fueword(volatile const void *base, long *val); 314 int __result_use_check fueword32(volatile const void *base, int32_t *val); 315 int __result_use_check fueword64(volatile const void *base, int64_t *val); 316 int __result_use_check subyte(volatile void *base, int byte); 317 int __result_use_check suword(volatile void *base, long word); 318 int __result_use_check suword16(volatile void *base, int word); 319 int __result_use_check suword32(volatile void *base, int32_t word); 320 int __result_use_check suword64(volatile void *base, int64_t word); 321 uint32_t casuword32(volatile uint32_t *base, uint32_t oldval, uint32_t newval); 322 u_long casuword(volatile u_long *p, u_long oldval, u_long newval); 323 int casueword32(volatile uint32_t *base, uint32_t oldval, uint32_t *oldvalp, 324 uint32_t newval); 325 int casueword(volatile u_long *p, u_long oldval, u_long *oldvalp, 326 u_long newval); 327 328 #if defined(SAN_NEEDS_INTERCEPTORS) && !defined(KCSAN) 329 int SAN_INTERCEPTOR(fubyte)(volatile const void *base); 330 int SAN_INTERCEPTOR(fuword16)(volatile const void *base); 331 int SAN_INTERCEPTOR(fueword)(volatile const void *base, long *val); 332 int SAN_INTERCEPTOR(fueword32)(volatile const void *base, int32_t *val); 333 int SAN_INTERCEPTOR(fueword64)(volatile const void *base, int64_t *val); 334 int SAN_INTERCEPTOR(subyte)(volatile void *base, int byte); 335 int SAN_INTERCEPTOR(suword)(volatile void *base, long word); 336 int SAN_INTERCEPTOR(suword16)(volatile void *base, int word); 337 int SAN_INTERCEPTOR(suword32)(volatile void *base, int32_t word); 338 int SAN_INTERCEPTOR(suword64)(volatile void *base, int64_t word); 339 int SAN_INTERCEPTOR(casueword32)(volatile uint32_t *base, uint32_t oldval, 340 uint32_t *oldvalp, uint32_t newval); 341 int SAN_INTERCEPTOR(casueword)(volatile u_long *p, u_long oldval, 342 u_long *oldvalp, u_long newval); 343 #ifndef SAN_RUNTIME 344 #define fubyte(b) SAN_INTERCEPTOR(fubyte)((b)) 345 #define fuword16(b) SAN_INTERCEPTOR(fuword16)((b)) 346 #define fueword(b, v) SAN_INTERCEPTOR(fueword)((b), (v)) 347 #define fueword32(b, v) SAN_INTERCEPTOR(fueword32)((b), (v)) 348 #define fueword64(b, v) SAN_INTERCEPTOR(fueword64)((b), (v)) 349 #define subyte(b, w) SAN_INTERCEPTOR(subyte)((b), (w)) 350 #define suword(b, w) SAN_INTERCEPTOR(suword)((b), (w)) 351 #define suword16(b, w) SAN_INTERCEPTOR(suword16)((b), (w)) 352 #define suword32(b, w) SAN_INTERCEPTOR(suword32)((b), (w)) 353 #define suword64(b, w) SAN_INTERCEPTOR(suword64)((b), (w)) 354 #define casueword32(b, o, p, n) SAN_INTERCEPTOR(casueword32)((b), (o), (p), (n)) 355 #define casueword(b, o, p, n) SAN_INTERCEPTOR(casueword)((b), (o), (p), (n)) 356 #endif /* !SAN_RUNTIME */ 357 #endif /* SAN_NEEDS_INTERCEPTORS && !KCSAN */ 358 359 int sysbeep(int hertz, sbintime_t duration); 360 361 void hardclock(int cnt, int usermode); 362 void hardclock_sync(int cpu); 363 void statclock(int cnt, int usermode); 364 void profclock(int cnt, int usermode, uintfptr_t pc); 365 366 int hardclockintr(void); 367 368 void startprofclock(struct proc *); 369 void stopprofclock(struct proc *); 370 void cpu_startprofclock(void); 371 void cpu_stopprofclock(void); 372 void suspendclock(void); 373 void resumeclock(void); 374 sbintime_t cpu_idleclock(void); 375 void cpu_activeclock(void); 376 void cpu_new_callout(int cpu, sbintime_t bt, sbintime_t bt_opt); 377 void cpu_et_frequency(struct eventtimer *et, uint64_t newfreq); 378 extern int cpu_disable_c2_sleep; 379 extern int cpu_disable_c3_sleep; 380 381 extern void (*tcp_hpts_softclock)(void); 382 #define tcp_hpts_softclock() do { \ 383 if (tcp_hpts_softclock != NULL) \ 384 tcp_hpts_softclock(); \ 385 } while (0) 386 387 char *kern_getenv(const char *name); 388 void freeenv(char *env); 389 int getenv_int(const char *name, int *data); 390 int getenv_uint(const char *name, unsigned int *data); 391 int getenv_long(const char *name, long *data); 392 int getenv_ulong(const char *name, unsigned long *data); 393 int getenv_string(const char *name, char *data, int size); 394 int getenv_int64(const char *name, int64_t *data); 395 int getenv_uint64(const char *name, uint64_t *data); 396 int getenv_quad(const char *name, quad_t *data); 397 int getenv_bool(const char *name, bool *data); 398 bool getenv_is_true(const char *name); 399 bool getenv_is_false(const char *name); 400 int kern_setenv(const char *name, const char *value); 401 int kern_unsetenv(const char *name); 402 int testenv(const char *name); 403 404 int getenv_array(const char *name, void *data, int size, int *psize, 405 int type_size, bool allow_signed); 406 #define GETENV_UNSIGNED false /* negative numbers not allowed */ 407 #define GETENV_SIGNED true /* negative numbers allowed */ 408 409 typedef uint64_t (cpu_tick_f)(void); 410 void set_cputicker(cpu_tick_f *func, uint64_t freq, bool isvariable); 411 extern cpu_tick_f *cpu_ticks; 412 uint64_t cpu_tickrate(void); 413 uint64_t cputick2usec(uint64_t tick); 414 415 #include <sys/libkern.h> 416 417 /* Initialize the world */ 418 void consinit(void); 419 void cpu_initclocks(void); 420 void cpu_initclocks_bsp(void); 421 void cpu_initclocks_ap(void); 422 void usrinfoinit(void); 423 424 /* Finalize the world */ 425 void kern_reboot(int) __dead2; 426 void shutdown_nice(int); 427 428 /* Stubs for obsolete functions that used to be for interrupt management */ 429 static __inline intrmask_t splhigh(void) { return 0; } 430 static __inline intrmask_t splimp(void) { return 0; } 431 static __inline intrmask_t splnet(void) { return 0; } 432 static __inline intrmask_t spltty(void) { return 0; } 433 static __inline void splx(intrmask_t ipl __unused) { return; } 434 435 /* 436 * Common `proc' functions are declared here so that proc.h can be included 437 * less often. 438 */ 439 int _sleep(const void * _Nonnull chan, struct lock_object *lock, int pri, 440 const char *wmesg, sbintime_t sbt, sbintime_t pr, int flags); 441 #define msleep(chan, mtx, pri, wmesg, timo) \ 442 _sleep((chan), &(mtx)->lock_object, (pri), (wmesg), \ 443 tick_sbt * (timo), 0, C_HARDCLOCK) 444 #define msleep_sbt(chan, mtx, pri, wmesg, bt, pr, flags) \ 445 _sleep((chan), &(mtx)->lock_object, (pri), (wmesg), (bt), (pr), \ 446 (flags)) 447 int msleep_spin_sbt(const void * _Nonnull chan, struct mtx *mtx, 448 const char *wmesg, sbintime_t sbt, sbintime_t pr, int flags); 449 #define msleep_spin(chan, mtx, wmesg, timo) \ 450 msleep_spin_sbt((chan), (mtx), (wmesg), tick_sbt * (timo), \ 451 0, C_HARDCLOCK) 452 int pause_sbt(const char *wmesg, sbintime_t sbt, sbintime_t pr, 453 int flags); 454 static __inline int 455 pause(const char *wmesg, int timo) 456 { 457 return (pause_sbt(wmesg, tick_sbt * timo, 0, C_HARDCLOCK)); 458 } 459 #define pause_sig(wmesg, timo) \ 460 pause_sbt((wmesg), tick_sbt * (timo), 0, C_HARDCLOCK | C_CATCH) 461 #define tsleep(chan, pri, wmesg, timo) \ 462 _sleep((chan), NULL, (pri), (wmesg), tick_sbt * (timo), \ 463 0, C_HARDCLOCK) 464 #define tsleep_sbt(chan, pri, wmesg, bt, pr, flags) \ 465 _sleep((chan), NULL, (pri), (wmesg), (bt), (pr), (flags)) 466 void wakeup(const void *chan); 467 void wakeup_one(const void *chan); 468 void wakeup_any(const void *chan); 469 470 /* 471 * Common `struct cdev *' stuff are declared here to avoid #include poisoning 472 */ 473 474 struct cdev; 475 dev_t dev2udev(struct cdev *x); 476 const char *devtoname(struct cdev *cdev); 477 478 #ifdef __LP64__ 479 size_t devfs_iosize_max(void); 480 size_t iosize_max(void); 481 #endif 482 483 int poll_no_poll(int events); 484 485 /* XXX: Should be void nanodelay(u_int nsec); */ 486 void DELAY(int usec); 487 488 /* Root mount holdback API */ 489 struct root_hold_token { 490 int flags; 491 const char *who; 492 TAILQ_ENTRY(root_hold_token) list; 493 }; 494 495 struct root_hold_token *root_mount_hold(const char *identifier); 496 void root_mount_hold_token(const char *identifier, struct root_hold_token *h); 497 void root_mount_rel(struct root_hold_token *h); 498 int root_mounted(void); 499 500 /* 501 * Unit number allocation API. (kern/subr_unit.c) 502 */ 503 struct unrhdr; 504 #define UNR_NO_MTX ((void *)(uintptr_t)-1) 505 struct unrhdr *new_unrhdr(int low, int high, struct mtx *mutex); 506 void init_unrhdr(struct unrhdr *uh, int low, int high, struct mtx *mutex); 507 void delete_unrhdr(struct unrhdr *uh); 508 void clear_unrhdr(struct unrhdr *uh); 509 void clean_unrhdr(struct unrhdr *uh); 510 void clean_unrhdrl(struct unrhdr *uh); 511 int alloc_unr(struct unrhdr *uh); 512 int alloc_unr_specific(struct unrhdr *uh, u_int item); 513 int alloc_unrl(struct unrhdr *uh); 514 void free_unr(struct unrhdr *uh, u_int item); 515 void *create_iter_unr(struct unrhdr *uh); 516 int next_iter_unr(void *handle); 517 void free_iter_unr(void *handle); 518 519 struct unrhdr64 { 520 uint64_t counter; 521 }; 522 523 static __inline void 524 new_unrhdr64(struct unrhdr64 *unr64, uint64_t low) 525 { 526 527 unr64->counter = low; 528 } 529 530 static __inline uint64_t 531 alloc_unr64(struct unrhdr64 *unr64) 532 { 533 534 return (atomic_fetchadd_64(&unr64->counter, 1)); 535 } 536 537 void intr_prof_stack_use(struct thread *td, struct trapframe *frame); 538 539 void counted_warning(unsigned *counter, const char *msg); 540 541 /* 542 * APIs to manage deprecation and obsolescence. 543 */ 544 void _gone_in(int major, const char *msg); 545 void _gone_in_dev(device_t dev, int major, const char *msg); 546 #ifdef NO_OBSOLETE_CODE 547 #define __gone_ok(m, msg) \ 548 _Static_assert(m < P_OSREL_MAJOR(__FreeBSD_version)), \ 549 "Obsolete code: " msg); 550 #else 551 #define __gone_ok(m, msg) 552 #endif 553 #define gone_in(major, msg) __gone_ok(major, msg) _gone_in(major, msg) 554 #define gone_in_dev(dev, major, msg) __gone_ok(major, msg) _gone_in_dev(dev, major, msg) 555 556 #ifdef INVARIANTS 557 #define __diagused 558 #else 559 #define __diagused __unused 560 #endif 561 562 #ifdef WITNESS 563 #define __witness_used 564 #else 565 #define __witness_used __unused 566 #endif 567 568 #endif /* _KERNEL */ 569 570 __NULLABILITY_PRAGMA_POP 571 #endif /* !_SYS_SYSTM_H_ */ 572