* 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
* 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.
- *
+ *
* 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,
* 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 */
*
* @(#)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).
* 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.
*
*/
#ifndef _SYS_SYSTM_H_
-#define _SYS_SYSTM_H_
+#define _SYS_SYSTM_H_
#include <sys/appleapiopts.h>
#include <sys/cdefs.h>
__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
-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 */
-#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
-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);
-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 void bsdinit_task(void);
+extern void bsdinit_task(void);
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;
-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 throttle_info_end_io(buf_t bp);
#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 */
-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);
-#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 *);
-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 *);
-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);
+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);
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;
-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)
*/
-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 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 */
projects / apple / xnu.git / blobdiff