f08ef6c595
credentials from inp_cred which is also available after the socket is gone. Switch cr_canseesocket consumers to cr_canseeinpcb. This removes an extra acquisition of the socket lock. Reviewed by: rwatson MFC after: 3 months (set timer; decide then)
396 lines
14 KiB
C
396 lines
14 KiB
C
/*-
|
|
* Copyright (c) 1982, 1988, 1991, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
* (c) UNIX System Laboratories, Inc.
|
|
* All or some portions of this file are derived from material licensed
|
|
* to the University of California by American Telephone and Telegraph
|
|
* Co. or Unix System Laboratories, Inc. and are reproduced herein with
|
|
* the permission of UNIX System Laboratories, Inc.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* @(#)systm.h 8.7 (Berkeley) 3/29/95
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#ifndef _SYS_SYSTM_H_
|
|
#define _SYS_SYSTM_H_
|
|
|
|
#include <machine/atomic.h>
|
|
#include <machine/cpufunc.h>
|
|
#include <sys/callout.h>
|
|
#include <sys/cdefs.h>
|
|
#include <sys/queue.h>
|
|
#include <sys/stdint.h> /* for people using printf mainly */
|
|
|
|
extern int securelevel; /* system security level (see init(8)) */
|
|
|
|
extern int cold; /* nonzero if we are doing a cold boot */
|
|
extern int rebooting; /* boot() has been called. */
|
|
extern const char *panicstr; /* panic message */
|
|
extern char version[]; /* system version */
|
|
extern char copyright[]; /* system copyright */
|
|
extern int kstack_pages; /* number of kernel stack pages */
|
|
|
|
extern int nswap; /* size of swap space */
|
|
|
|
extern long physmem; /* physical memory */
|
|
extern long realmem; /* 'real' memory */
|
|
|
|
extern char *rootdevnames[2]; /* names of possible root devices */
|
|
|
|
extern int boothowto; /* reboot flags, from console subsystem */
|
|
extern int bootverbose; /* nonzero to print verbose messages */
|
|
|
|
extern int maxusers; /* system tune hint */
|
|
|
|
#ifdef INVARIANTS /* The option is always available */
|
|
#define KASSERT(exp,msg) do { \
|
|
if (__predict_false(!(exp))) \
|
|
panic msg; \
|
|
} while (0)
|
|
#define VNASSERT(exp, vp, msg) do { \
|
|
if (__predict_false(!(exp))) { \
|
|
vn_printf(vp, "VNASSERT failed\n"); \
|
|
panic msg; \
|
|
} \
|
|
} while (0)
|
|
#else
|
|
#define KASSERT(exp,msg) do { \
|
|
} while (0)
|
|
|
|
#define VNASSERT(exp, vp, msg) do { \
|
|
} while (0)
|
|
#endif
|
|
|
|
#ifndef CTASSERT /* Allow lint to override */
|
|
#define CTASSERT(x) _CTASSERT(x, __LINE__)
|
|
#define _CTASSERT(x, y) __CTASSERT(x, y)
|
|
#define __CTASSERT(x, y) typedef char __assert ## y[(x) ? 1 : -1]
|
|
#endif
|
|
|
|
/*
|
|
* XXX the hints declarations are even more misplaced than most declarations
|
|
* in this file, since they are needed in one file (per arch) and only used
|
|
* in two files.
|
|
* XXX most of these variables should be const.
|
|
*/
|
|
extern int osreldate;
|
|
extern int envmode;
|
|
extern int hintmode; /* 0 = off. 1 = config, 2 = fallback */
|
|
extern int dynamic_kenv;
|
|
extern struct mtx kenv_lock;
|
|
extern char *kern_envp;
|
|
extern char static_env[];
|
|
extern char static_hints[]; /* by config for now */
|
|
|
|
extern char **kenvp;
|
|
|
|
/*
|
|
* General function declarations.
|
|
*/
|
|
|
|
struct inpcb;
|
|
struct lock_object;
|
|
struct malloc_type;
|
|
struct mtx;
|
|
struct proc;
|
|
struct socket;
|
|
struct thread;
|
|
struct tty;
|
|
struct ucred;
|
|
struct uio;
|
|
struct _jmp_buf;
|
|
|
|
int setjmp(struct _jmp_buf *);
|
|
void longjmp(struct _jmp_buf *, int) __dead2;
|
|
int dumpstatus(vm_offset_t addr, off_t count);
|
|
int nullop(void);
|
|
int eopnotsupp(void);
|
|
int ureadc(int, struct uio *);
|
|
void hashdestroy(void *, struct malloc_type *, u_long);
|
|
void *hashinit(int count, struct malloc_type *type, u_long *hashmark);
|
|
void *hashinit_flags(int count, struct malloc_type *type,
|
|
u_long *hashmask, int flags);
|
|
#define HASH_NOWAIT 0x00000001
|
|
#define HASH_WAITOK 0x00000002
|
|
|
|
void *phashinit(int count, struct malloc_type *type, u_long *nentries);
|
|
void g_waitidle(void);
|
|
|
|
#ifdef RESTARTABLE_PANICS
|
|
void panic(const char *, ...) __printflike(1, 2);
|
|
#else
|
|
void panic(const char *, ...) __dead2 __printflike(1, 2);
|
|
#endif
|
|
|
|
void cpu_boot(int);
|
|
void cpu_rootconf(void);
|
|
void critical_enter(void);
|
|
void critical_exit(void);
|
|
void init_param1(void);
|
|
void init_param2(long physpages);
|
|
void init_param3(long kmempages);
|
|
void tablefull(const char *);
|
|
int kvprintf(char const *, void (*)(int, void*), void *, int,
|
|
__va_list) __printflike(1, 0);
|
|
void log(int, const char *, ...) __printflike(2, 3);
|
|
void log_console(struct uio *);
|
|
int printf(const char *, ...) __printflike(1, 2);
|
|
int snprintf(char *, size_t, const char *, ...) __printflike(3, 4);
|
|
int sprintf(char *buf, const char *, ...) __printflike(2, 3);
|
|
int uprintf(const char *, ...) __printflike(1, 2);
|
|
int vprintf(const char *, __va_list) __printflike(1, 0);
|
|
int vsnprintf(char *, size_t, const char *, __va_list) __printflike(3, 0);
|
|
int vsnrprintf(char *, size_t, int, const char *, __va_list) __printflike(4, 0);
|
|
int vsprintf(char *buf, const char *, __va_list) __printflike(2, 0);
|
|
int ttyprintf(struct tty *, const char *, ...) __printflike(2, 3);
|
|
int sscanf(const char *, char const *, ...) __nonnull(1) __nonnull(2);
|
|
int vsscanf(const char *, char const *, __va_list) __nonnull(1) __nonnull(2);
|
|
long strtol(const char *, char **, int) __nonnull(1);
|
|
u_long strtoul(const char *, char **, int) __nonnull(1);
|
|
quad_t strtoq(const char *, char **, int) __nonnull(1);
|
|
u_quad_t strtouq(const char *, char **, int) __nonnull(1);
|
|
void tprintf(struct proc *p, int pri, const char *, ...) __printflike(3, 4);
|
|
void hexdump(const void *ptr, int length, const char *hdr, int flags);
|
|
#define HD_COLUMN_MASK 0xff
|
|
#define HD_DELIM_MASK 0xff00
|
|
#define HD_OMIT_COUNT (1 << 16)
|
|
#define HD_OMIT_HEX (1 << 17)
|
|
#define HD_OMIT_CHARS (1 << 18)
|
|
|
|
#define ovbcopy(f, t, l) bcopy((f), (t), (l))
|
|
void bcopy(const void *from, void *to, size_t len) __nonnull(1) __nonnull(2);
|
|
void bzero(void *buf, size_t len) __nonnull(1);
|
|
|
|
void *memcpy(void *to, const void *from, size_t len) __nonnull(1) __nonnull(2);
|
|
|
|
int copystr(const void * __restrict kfaddr, void * __restrict kdaddr,
|
|
size_t len, size_t * __restrict lencopied)
|
|
__nonnull(1) __nonnull(2);
|
|
int copyinstr(const void * __restrict udaddr, void * __restrict kaddr,
|
|
size_t len, size_t * __restrict lencopied)
|
|
__nonnull(1) __nonnull(2);
|
|
int copyin(const void * __restrict udaddr, void * __restrict kaddr,
|
|
size_t len) __nonnull(1) __nonnull(2);
|
|
int copyout(const void * __restrict kaddr, void * __restrict udaddr,
|
|
size_t len) __nonnull(1) __nonnull(2);
|
|
|
|
int fubyte(const void *base);
|
|
long fuword(const void *base);
|
|
int fuword16(void *base);
|
|
int32_t fuword32(const void *base);
|
|
int64_t fuword64(const void *base);
|
|
int subyte(void *base, int byte);
|
|
int suword(void *base, long word);
|
|
int suword16(void *base, int word);
|
|
int suword32(void *base, int32_t word);
|
|
int suword64(void *base, int64_t word);
|
|
uint32_t casuword32(volatile uint32_t *base, uint32_t oldval, uint32_t newval);
|
|
u_long casuword(volatile u_long *p, u_long oldval, u_long newval);
|
|
|
|
void realitexpire(void *);
|
|
|
|
int sysbeep(int hertz, int period);
|
|
|
|
void hardclock(int usermode, uintfptr_t pc);
|
|
void hardclock_cpu(int usermode);
|
|
void softclock(void *);
|
|
void statclock(int usermode);
|
|
void profclock(int usermode, uintfptr_t pc);
|
|
|
|
void startprofclock(struct proc *);
|
|
void stopprofclock(struct proc *);
|
|
void cpu_startprofclock(void);
|
|
void cpu_stopprofclock(void);
|
|
|
|
int cr_cansee(struct ucred *u1, struct ucred *u2);
|
|
int cr_canseesocket(struct ucred *cred, struct socket *so);
|
|
int cr_canseeinpcb(struct ucred *cred, struct inpcb *inp);
|
|
|
|
char *getenv(const char *name);
|
|
void freeenv(char *env);
|
|
int getenv_int(const char *name, int *data);
|
|
int getenv_uint(const char *name, unsigned int *data);
|
|
int getenv_long(const char *name, long *data);
|
|
int getenv_ulong(const char *name, unsigned long *data);
|
|
int getenv_string(const char *name, char *data, int size);
|
|
int getenv_quad(const char *name, quad_t *data);
|
|
int setenv(const char *name, const char *value);
|
|
int unsetenv(const char *name);
|
|
int testenv(const char *name);
|
|
|
|
typedef uint64_t (cpu_tick_f)(void);
|
|
void set_cputicker(cpu_tick_f *func, uint64_t freq, unsigned var);
|
|
extern cpu_tick_f *cpu_ticks;
|
|
uint64_t cpu_tickrate(void);
|
|
uint64_t cputick2usec(uint64_t tick);
|
|
|
|
#ifdef APM_FIXUP_CALLTODO
|
|
struct timeval;
|
|
void adjust_timeout_calltodo(struct timeval *time_change);
|
|
#endif /* APM_FIXUP_CALLTODO */
|
|
|
|
#include <sys/libkern.h>
|
|
|
|
/* Initialize the world */
|
|
void consinit(void);
|
|
void cpu_initclocks(void);
|
|
void usrinfoinit(void);
|
|
|
|
/* Finalize the world */
|
|
void shutdown_nice(int);
|
|
|
|
/* Timeouts */
|
|
typedef void timeout_t(void *); /* timeout function type */
|
|
#define CALLOUT_HANDLE_INITIALIZER(handle) \
|
|
{ NULL }
|
|
|
|
void callout_handle_init(struct callout_handle *);
|
|
struct callout_handle timeout(timeout_t *, void *, int);
|
|
void untimeout(timeout_t *, void *, struct callout_handle);
|
|
caddr_t kern_timeout_callwheel_alloc(caddr_t v);
|
|
void kern_timeout_callwheel_init(void);
|
|
|
|
/* Stubs for obsolete functions that used to be for interrupt management */
|
|
static __inline void spl0(void) { return; }
|
|
static __inline intrmask_t splbio(void) { return 0; }
|
|
static __inline intrmask_t splcam(void) { return 0; }
|
|
static __inline intrmask_t splclock(void) { return 0; }
|
|
static __inline intrmask_t splhigh(void) { return 0; }
|
|
static __inline intrmask_t splimp(void) { return 0; }
|
|
static __inline intrmask_t splnet(void) { return 0; }
|
|
static __inline intrmask_t splsoftcam(void) { return 0; }
|
|
static __inline intrmask_t splsoftclock(void) { return 0; }
|
|
static __inline intrmask_t splsofttty(void) { return 0; }
|
|
static __inline intrmask_t splsoftvm(void) { return 0; }
|
|
static __inline intrmask_t splsofttq(void) { return 0; }
|
|
static __inline intrmask_t splstatclock(void) { return 0; }
|
|
static __inline intrmask_t spltty(void) { return 0; }
|
|
static __inline intrmask_t splvm(void) { return 0; }
|
|
static __inline void splx(intrmask_t ipl __unused) { return; }
|
|
|
|
/*
|
|
* Common `proc' functions are declared here so that proc.h can be included
|
|
* less often.
|
|
*/
|
|
int _sleep(void *chan, struct lock_object *lock, int pri, const char *wmesg,
|
|
int timo) __nonnull(1);
|
|
#define msleep(chan, mtx, pri, wmesg, timo) \
|
|
_sleep((chan), &(mtx)->lock_object, (pri), (wmesg), (timo))
|
|
int msleep_spin(void *chan, struct mtx *mtx, const char *wmesg, int timo)
|
|
__nonnull(1);
|
|
int pause(const char *wmesg, int timo);
|
|
#define tsleep(chan, pri, wmesg, timo) \
|
|
_sleep((chan), NULL, (pri), (wmesg), (timo))
|
|
void wakeup(void *chan) __nonnull(1);
|
|
void wakeup_one(void *chan) __nonnull(1);
|
|
|
|
/*
|
|
* Common `struct cdev *' stuff are declared here to avoid #include poisoning
|
|
*/
|
|
|
|
struct cdev;
|
|
dev_t dev2udev(struct cdev *x);
|
|
const char *devtoname(struct cdev *cdev);
|
|
|
|
/* XXX: Should be void nanodelay(u_int nsec); */
|
|
void DELAY(int usec);
|
|
|
|
/* Root mount holdback API */
|
|
struct root_hold_token;
|
|
|
|
struct root_hold_token *root_mount_hold(const char *identifier);
|
|
void root_mount_rel(struct root_hold_token *h);
|
|
void root_mount_wait(void);
|
|
int root_mounted(void);
|
|
|
|
|
|
/*
|
|
* Unit number allocation API. (kern/subr_unit.c)
|
|
*/
|
|
struct unrhdr;
|
|
struct unrhdr *new_unrhdr(int low, int high, struct mtx *mutex);
|
|
void delete_unrhdr(struct unrhdr *uh);
|
|
void clean_unrhdr(struct unrhdr *uh);
|
|
void clean_unrhdrl(struct unrhdr *uh);
|
|
int alloc_unr(struct unrhdr *uh);
|
|
int alloc_unrl(struct unrhdr *uh);
|
|
void free_unr(struct unrhdr *uh, u_int item);
|
|
|
|
/*
|
|
* This is about as magic as it gets. fortune(1) has got similar code
|
|
* for reversing bits in a word. Who thinks up this stuff??
|
|
*
|
|
* Yes, it does appear to be consistently faster than:
|
|
* while (i = ffs(m)) {
|
|
* m >>= i;
|
|
* bits++;
|
|
* }
|
|
* and
|
|
* while (lsb = (m & -m)) { // This is magic too
|
|
* m &= ~lsb; // or: m ^= lsb
|
|
* bits++;
|
|
* }
|
|
* Both of these latter forms do some very strange things on gcc-3.1 with
|
|
* -mcpu=pentiumpro and/or -march=pentiumpro and/or -O or -O2.
|
|
* There is probably an SSE or MMX popcnt instruction.
|
|
*
|
|
* I wonder if this should be in libkern?
|
|
*
|
|
* XXX Stop the presses! Another one:
|
|
* static __inline u_int32_t
|
|
* popcnt1(u_int32_t v)
|
|
* {
|
|
* v -= ((v >> 1) & 0x55555555);
|
|
* v = (v & 0x33333333) + ((v >> 2) & 0x33333333);
|
|
* v = (v + (v >> 4)) & 0x0F0F0F0F;
|
|
* return (v * 0x01010101) >> 24;
|
|
* }
|
|
* The downside is that it has a multiply. With a pentium3 with
|
|
* -mcpu=pentiumpro and -march=pentiumpro then gcc-3.1 will use
|
|
* an imull, and in that case it is faster. In most other cases
|
|
* it appears slightly slower.
|
|
*
|
|
* Another variant (also from fortune):
|
|
* #define BITCOUNT(x) (((BX_(x)+(BX_(x)>>4)) & 0x0F0F0F0F) % 255)
|
|
* #define BX_(x) ((x) - (((x)>>1)&0x77777777) \
|
|
* - (((x)>>2)&0x33333333) \
|
|
* - (((x)>>3)&0x11111111))
|
|
*/
|
|
static __inline uint32_t
|
|
bitcount32(uint32_t x)
|
|
{
|
|
|
|
x = (x & 0x55555555) + ((x & 0xaaaaaaaa) >> 1);
|
|
x = (x & 0x33333333) + ((x & 0xcccccccc) >> 2);
|
|
x = (x + (x >> 4)) & 0x0f0f0f0f;
|
|
x = (x + (x >> 8));
|
|
x = (x + (x >> 16)) & 0x000000ff;
|
|
return (x);
|
|
}
|
|
|
|
#endif /* !_SYS_SYSTM_H_ */
|