xnu-6153.61.1.tar.gz

[apple/xnu.git] / bsd / sys / systm.h

diff --git a/bsd/sys/systm.h b/bsd/sys/systm.h
index 7d5a43c3153f48823c76dd35a81b2fdc360fe6cc..dfcd2e73197b4037f239690beff1ee12cb338cba 100644 (file)
--- a/bsd/sys/systm.h
+++ b/bsd/sys/systm.h
@@ -2,7 +2,7 @@
  * Copyright (c) 2000-2007 Apple Inc. All rights reserved.
  *
  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  * Copyright (c) 2000-2007 Apple Inc. All rights reserved.
  *
  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@

- * 
+ *

  * This file contains Original Code and/or Modifications of Original Code
  * as defined in and that are subject to the Apple Public Source License
  * Version 2.0 (the 'License'). You may not use this file except in
  * This file contains Original Code and/or Modifications of Original Code
  * as defined in and that are subject to the Apple Public Source License
  * Version 2.0 (the 'License'). You may not use this file except in


@@ -11,10 +11,10 @@
  * unlawful or unlicensed copies of an Apple operating system, or to
  * circumvent, violate, or enable the circumvention or violation of, any
  * terms of an Apple operating system software license agreement.
  * unlawful or unlicensed copies of an Apple operating system, or to
  * circumvent, violate, or enable the circumvention or violation of, any
  * terms of an Apple operating system software license agreement.

- * 
+ *

  * Please obtain a copy of the License at
  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  * Please obtain a copy of the License at
  * http://www.opensource.apple.com/apsl/ and read it before using this file.

- * 
+ *

  * The Original Code and all software distributed under the License are
  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  * The Original Code and all software distributed under the License are
  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,


@@ -22,7 +22,7 @@
  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  * Please see the License for the specific language governing rights and
  * limitations under the License.
  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  * Please see the License for the specific language governing rights and
  * limitations under the License.

- * 
+ *

  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  */
 /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  */
 /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */


@@ -65,7 +65,7 @@
  *
  *     @(#)systm.h     8.7 (Berkeley) 3/29/95
  */
  *
  *     @(#)systm.h     8.7 (Berkeley) 3/29/95
  */

- 
+

 /*
  * The `securelevel' variable controls the security level of the system.
  * It can only be decreased by process 1 (/sbin/init).
 /*
  * The `securelevel' variable controls the security level of the system.
  * It can only be decreased by process 1 (/sbin/init).


@@ -78,7 +78,7 @@
  *     raw disks of mounted filesystems, /dev/mem, and /dev/kmem are
  *     read-only.
  *    2        highly secure mode - same as (1) plus raw disks are always
  *     raw disks of mounted filesystems, /dev/mem, and /dev/kmem are
  *     read-only.
  *    2        highly secure mode - same as (1) plus raw disks are always

- *     read-only whether mounted or not. This level precludes tampering 
+ *     read-only whether mounted or not. This level precludes tampering

  *     with filesystems by unmounting them, but also inhibits running
  *     newfs while the system is secured.
  *
  *     with filesystems by unmounting them, but also inhibits running
  *     newfs while the system is secured.
  *


@@ -95,7 +95,7 @@
  */
 
 #ifndef _SYS_SYSTM_H_
  */
 
 #ifndef _SYS_SYSTM_H_

-#define        _SYS_SYSTM_H_
+#define _SYS_SYSTM_H_

 
 #include <sys/appleapiopts.h>
 #include <sys/cdefs.h>
 
 #include <sys/appleapiopts.h>
 #include <sys/cdefs.h>


@@ -117,126 +117,147 @@ __BEGIN_DECLS
 __END_DECLS
 
 #ifdef BSD_KERNEL_PRIVATE
 __END_DECLS
 
 #ifdef BSD_KERNEL_PRIVATE

-extern char version[];                 /* system version */
-extern const char copyright[];         /* system copyright */
+extern char version[];                  /* system version */
+extern const char copyright[];          /* system copyright */

 
 
 
 

-extern int     boothowto;      /* reboot flags, from console subsystem */
-extern int     show_space;
-extern int     minimalboot;
+extern int      boothowto;      /* reboot flags, from console subsystem */
+extern int      show_space;
+extern int      minimalboot;
+#if CONFIG_EMBEDDED
+extern int      darkboot;
+#endif

 
 

-extern int nblkdev;            /* number of entries in bdevsw */
-extern int nchrdev;            /* number of entries in cdevsw */
+extern const int nblkdev; /* number of entries in bdevsw */
+extern const int nchrdev; /* number of entries in cdevsw */

 #endif /* BSD_KERNEL_PRIVATE */
 
 #ifdef KERNEL_PRIVATE
 
 #endif /* BSD_KERNEL_PRIVATE */
 
 #ifdef KERNEL_PRIVATE
 

-extern int securelevel;                /* system security level */
-extern dev_t rootdev;          /* root device */
-extern struct vnode *rootvp;   /* vnode equivalent to above */
+extern int securelevel;         /* system security level */
+extern dev_t rootdev;           /* root device */
+extern struct vnode *rootvp;    /* vnode equivalent to above */

 
 #endif /* KERNEL_PRIVATE */
 
 
 #endif /* KERNEL_PRIVATE */
 

-#define SYSINIT(a,b,c,d,e)
-#define MALLOC_DEFINE(a,b,c)
+#define SYSINIT(a, b, c, d, e)
+#define MALLOC_DEFINE(a, b, c)

 
 

-#define getenv_int(a,b) (*b = 0)
-#define        KASSERT(exp,msg)
+#define getenv_int(a, b) (*b = 0)
+#define KASSERT(exp, msg)

 /*
  * General function declarations.
  */
 __BEGIN_DECLS
 
 #ifdef BSD_KERNEL_PRIVATE
 /*
  * General function declarations.
  */
 __BEGIN_DECLS
 
 #ifdef BSD_KERNEL_PRIVATE

-int    einval(void);
-void   nullsys(void);
-int    errsys(void);
-int    seltrue(dev_t dev, int which, struct proc *p);
-void   ttyprintf(struct tty *, const char *, ...) __printflike(2, 3);
-void   realitexpire(struct proc *);
-int    hzto(struct timeval *tv);
-void   tablefull(const char *);
-int    kvprintf(char const *, void (*)(int, void*), void *, int,
-                     __darwin_va_list);
-void   uprintf(const char *, ...) __printflike(1,2);
-int    copywithin(void *saddr, void *daddr, size_t len);
-int64_t        fulong(user_addr_t addr);
-int    sulong(user_addr_t addr, int64_t longword);
+int     einval(void);
+void    nullsys(void);
+int     errsys(void);
+int     seltrue(dev_t dev, int which, struct proc *p);
+void    ttyprintf(struct tty *, const char *, ...) __printflike(2, 3);
+void    realitexpire(struct proc *);
+int     hzto(struct timeval *tv);
+void    tablefull(const char *);
+int     kvprintf(char const *, void (*)(int, void*), void *, int,
+    __darwin_va_list) __printflike(1, 0);
+void    uprintf(const char *, ...) __printflike(1, 2);
+int     copywithin(void *saddr, void *daddr, size_t len);
+int64_t fulong(user_addr_t addr);
+int     sulong(user_addr_t addr, int64_t longword);

 uint64_t fuulong(user_addr_t addr);
 uint64_t fuulong(user_addr_t addr);

-int    suulong(user_addr_t addr, uint64_t ulongword);
-int    vslock(user_addr_t addr, user_size_t len);
-int    vsunlock(user_addr_t addr, user_size_t len, int dirtied);
-int    clone_system_shared_regions(int shared_regions_active,
-                                   int chain_regions,
-                                   int base_vnode);
+int     suulong(user_addr_t addr, uint64_t ulongword);
+int     clone_system_shared_regions(int shared_regions_active,
+    int chain_regions,
+    int base_vnode);

 extern kern_return_t bsd_exception(int, mach_exception_data_t codes, int);
 extern kern_return_t bsd_exception(int, mach_exception_data_t codes, int);

-extern void    bsdinit_task(void);
+extern void     bsdinit_task(void);

 extern void unix_syscall_return(int) __dead2;
 extern void unix_syscall_return(int) __dead2;

-void   initclocks(void);
-void   startprofclock(struct proc *);
-void   stopprofclock(struct proc *);
-void   setstatclockrate(int hzrate);
+void    initclocks(void);
+void    startprofclock(struct proc *);
+void    stopprofclock(struct proc *);
+void    setstatclockrate(int hzrate);

 struct time_value;
 struct time_value;

-void   get_procrustime(struct time_value *tv);
-void   load_init_program(struct proc *p);
+void    get_procrustime(struct time_value *tv);
+void    load_init_program(struct proc *p);

 void __pthread_testcancel(int presyscall);
 void throttle_info_get_last_io_time(mount_t mp, struct timeval *tv);
 void update_last_io_time(mount_t mp);
 void __pthread_testcancel(int presyscall);
 void throttle_info_get_last_io_time(mount_t mp, struct timeval *tv);
 void update_last_io_time(mount_t mp);

+void throttle_info_end_io(buf_t bp);

 #endif /* BSD_KERNEL_PRIVATE */
 
 #ifdef KERNEL_PRIVATE
 #endif /* BSD_KERNEL_PRIVATE */
 
 #ifdef KERNEL_PRIVATE

-void   timeout(void (*)(void *), void *arg, int ticks);
-void   timeout_with_leeway(void (*)(void *), void *arg, int ticks, int leeway_ticks);
-void   untimeout(void (*)(void *), void *arg);
-int    bsd_hostname(char *, int, int*);
+void    timeout(void (*)(void *), void *arg, int ticks);
+void    timeout_with_leeway(void (*)(void *), void *arg, int ticks, int leeway_ticks);
+void    untimeout(void (*)(void *), void *arg);
+int     bsd_hostname(char *, int, int*);
+int     vslock(user_addr_t addr, user_size_t len);
+int     vsunlock(user_addr_t addr, user_size_t len, int dirtied);

 #endif /* KERNEL_PRIVATE */
 
 #endif /* KERNEL_PRIVATE */
 

-int    nullop(void);
-int    nulldev(void);
-int    enoioctl(void);
-int    enosys(void);
-int    enxio(void);
-int    eopnotsupp(void);
-void   *hashinit(int count, int type, u_long *hashmask);
-void   ovbcopy(const void *from, void *to, size_t len);
-int    fubyte(user_addr_t addr);
-int    fuibyte(user_addr_t addr);
-int    subyte(user_addr_t addr, int byte);
-int    suibyte(user_addr_t addr, int byte);
+int     nullop(void);
+int     nulldev(void);
+int     enoioctl(void);
+int     enosys(void);
+int     enxio(void);
+int     eopnotsupp(void);
+void    *hashinit(int count, int type, u_long *hashmask);
+void    ovbcopy(const void *from, void *to, size_t len);
+int     fubyte(user_addr_t addr);
+int     fuibyte(user_addr_t addr);
+int     subyte(user_addr_t addr, int byte);
+int     suibyte(user_addr_t addr, int byte);

 long   fuword(user_addr_t addr);
 long   fuiword(user_addr_t addr);
 int    suword(user_addr_t addr, long word);
 int    suiword(user_addr_t addr, long word);
 long   fuword(user_addr_t addr);
 long   fuiword(user_addr_t addr);
 int    suword(user_addr_t addr, long word);
 int    suiword(user_addr_t addr, long word);

-#define fusize(_a)     ((user_size_t)fulong(_a))
-#define susize(_a, _s) sulong((_a), (_s))
-#define fuptr(a)       ((user_addr_t)fulong(_a)
-#define suptr(_a, _p)  sulong((_a), (_p))
-int    useracc(user_addr_t addr, user_size_t len,int prot);
+#define fusize(_a)      ((user_size_t)fulong(_a))
+#define susize(_a, _s)  sulong((_a), (_s))
+#define fuptr(a)        ((user_addr_t)fulong(_a)
+#define suptr(_a, _p)   sulong((_a), (_p))
+int     useracc(user_addr_t addr, user_size_t len, int prot);

 typedef void (*timeout_fcn_t)(void *);
 typedef void (*timeout_fcn_t)(void *);

-void   bsd_timeout(void (*)(void *), void *arg, struct timespec * ts);
-void   bsd_untimeout(void (*)(void *), void *arg);
-void   set_fsblocksize(struct vnode *);
+void    bsd_timeout(void (*)(void *), void *arg, struct timespec * ts);
+void    bsd_untimeout(void (*)(void *), void *arg);
+void    set_fsblocksize(struct vnode *);

 uint64_t tvtoabstime(struct timeval *);
 uint64_t tstoabstime(struct timespec *);
 uint64_t tvtoabstime(struct timeval *);
 uint64_t tstoabstime(struct timespec *);

-void   *throttle_info_create(void);
-void   throttle_info_mount_ref(mount_t mp, void * throttle_info);
-void   throttle_info_mount_rel(mount_t mp);
-void   throttle_info_release(void *throttle_info);
-void   throttle_info_update(void *throttle_info, int flags);
+void    *throttle_info_create(void);
+void    throttle_info_mount_ref(mount_t mp, void * throttle_info);
+void    throttle_info_mount_rel(mount_t mp);
+void    throttle_info_release(void *throttle_info);
+void    throttle_info_update(void *throttle_info, int flags);

 uint32_t throttle_lowpri_io(int sleep_amount);
 uint32_t throttle_lowpri_io(int sleep_amount);

-void   throttle_set_thread_io_policy(int policy);
+/* returns TRUE if the throttle_lowpri_io called with the same sleep_amount would've slept */
+int     throttle_lowpri_io_will_be_throttled(int sleep_amount);
+void    throttle_set_thread_io_policy(int policy);
+int             throttle_get_thread_effective_io_policy(void);

 
 typedef struct __throttle_info_handle *throttle_info_handle_t;
 
 typedef struct __throttle_info_handle *throttle_info_handle_t;

-int    throttle_info_ref_by_mask(uint64_t throttle_mask, throttle_info_handle_t *throttle_info_handle);
-void   throttle_info_rel_by_mask(throttle_info_handle_t throttle_info_handle);
-void   throttle_info_update_by_mask(void *throttle_info_handle, int flags);
-void   throttle_info_disable_throttle(int devno, boolean_t isfusion);
+int     throttle_info_ref_by_mask(uint64_t throttle_mask, throttle_info_handle_t *throttle_info_handle);
+void    throttle_info_rel_by_mask(throttle_info_handle_t throttle_info_handle);
+void    throttle_info_update_by_mask(void *throttle_info_handle, int flags);
+void    throttle_info_disable_throttle(int devno, boolean_t isfusion);

 /*
  * 'throttle_info_handle' acquired via 'throttle_info_ref_by_mask'
  * 'policy' should be specified as either IOPOL_UTILITY or IPOL_THROTTLE,
  * all other values will be treated as IOPOL_NORMAL (i.e. no throttling)
  */
 /*
  * 'throttle_info_handle' acquired via 'throttle_info_ref_by_mask'
  * 'policy' should be specified as either IOPOL_UTILITY or IPOL_THROTTLE,
  * all other values will be treated as IOPOL_NORMAL (i.e. no throttling)
  */

-int    throttle_info_io_will_be_throttled(void *throttle_info_handle, int policy);
+int     throttle_info_io_will_be_throttled(void *throttle_info_handle, int policy);
+
+#ifdef KERNEL_PRIVATE
+
+/* returned by throttle_io_will_be_throttled */
+#define THROTTLE_DISENGAGED     0
+#define THROTTLE_ENGAGED        1
+#define THROTTLE_NOW            2
+
+int  throttle_io_will_be_throttled(int lowpri_window_msecs, mount_t mp);
+int throttle_lowpri_window(void) __attribute__((pure));
+struct uthread;
+void throttle_info_reset_window(struct uthread *ut);
+
+#endif

 
 #ifdef XNU_KERNEL_PRIVATE
 void *exec_spawnattr_getmacpolicyinfo(const void *macextensions, const char *policyname, size_t *lenp);
 
 #ifdef XNU_KERNEL_PRIVATE
 void *exec_spawnattr_getmacpolicyinfo(const void *macextensions, const char *policyname, size_t *lenp);


@@ -244,9 +265,7 @@ void *exec_spawnattr_getmacpolicyinfo(const void *macextensions, const char *pol
 
 #ifdef BSD_KERNEL_PRIVATE
 
 
 #ifdef BSD_KERNEL_PRIVATE
 

-#define THROTTLE_IO_ENABLE     1
-#define THROTTLE_IO_DISABLE    0
-void sys_override_io_throttle(int flag);
+void sys_override_io_throttle(boolean_t enable_override);

 
 #endif /* BSD_KERNEL_PRIVATE */
 
 
 #endif /* BSD_KERNEL_PRIVATE */