diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/hrtimer.h | 24 | ||||
| -rw-r--r-- | include/linux/posix-clock.h | 150 | ||||
| -rw-r--r-- | include/linux/posix-timers.h | 44 | ||||
| -rw-r--r-- | include/linux/sched.h | 2 | ||||
| -rw-r--r-- | include/linux/security.h | 9 | ||||
| -rw-r--r-- | include/linux/syscalls.h | 2 | ||||
| -rw-r--r-- | include/linux/thread_info.h | 3 | ||||
| -rw-r--r-- | include/linux/time.h | 14 | ||||
| -rw-r--r-- | include/linux/timex.h | 3 |
9 files changed, 210 insertions, 41 deletions
diff --git a/include/linux/hrtimer.h b/include/linux/hrtimer.h index f376ddc64c4d..62f500c724f9 100644 --- a/include/linux/hrtimer.h +++ b/include/linux/hrtimer.h @@ -54,11 +54,13 @@ enum hrtimer_restart { * 0x00 inactive * 0x01 enqueued into rbtree * 0x02 callback function running + * 0x04 timer is migrated to another cpu * * Special cases: * 0x03 callback function running and enqueued * (was requeued on another CPU) - * 0x09 timer was migrated on CPU hotunplug + * 0x05 timer was migrated on CPU hotunplug + * * The "callback function running and enqueued" status is only possible on * SMP. It happens for example when a posix timer expired and the callback * queued a signal. Between dropping the lock which protects the posix timer @@ -67,8 +69,11 @@ enum hrtimer_restart { * as otherwise the timer could be removed before the softirq code finishes the * the handling of the timer. * - * The HRTIMER_STATE_ENQUEUED bit is always or'ed to the current state to - * preserve the HRTIMER_STATE_CALLBACK bit in the above scenario. + * The HRTIMER_STATE_ENQUEUED bit is always or'ed to the current state + * to preserve the HRTIMER_STATE_CALLBACK in the above scenario. This + * also affects HRTIMER_STATE_MIGRATE where the preservation is not + * necessary. HRTIMER_STATE_MIGRATE is cleared after the timer is + * enqueued on the new cpu. * * All state transitions are protected by cpu_base->lock. */ @@ -148,7 +153,12 @@ struct hrtimer_clock_base { #endif }; -#define HRTIMER_MAX_CLOCK_BASES 2 +enum hrtimer_base_type { + HRTIMER_BASE_REALTIME, + HRTIMER_BASE_MONOTONIC, + HRTIMER_BASE_BOOTTIME, + HRTIMER_MAX_CLOCK_BASES, +}; /* * struct hrtimer_cpu_base - the per cpu clock bases @@ -308,6 +318,7 @@ static inline int hrtimer_is_hres_active(struct hrtimer *timer) extern ktime_t ktime_get(void); extern ktime_t ktime_get_real(void); +extern ktime_t ktime_get_boottime(void); DECLARE_PER_CPU(struct tick_device, tick_cpu_device); @@ -370,8 +381,9 @@ extern int hrtimer_get_res(const clockid_t which_clock, struct timespec *tp); extern ktime_t hrtimer_get_next_event(void); /* - * A timer is active, when it is enqueued into the rbtree or the callback - * function is running. + * A timer is active, when it is enqueued into the rbtree or the + * callback function is running or it's in the state of being migrated + * to another cpu. */ static inline int hrtimer_active(const struct hrtimer *timer) { diff --git a/include/linux/posix-clock.h b/include/linux/posix-clock.h new file mode 100644 index 000000000000..369e19d3750b --- /dev/null +++ b/include/linux/posix-clock.h @@ -0,0 +1,150 @@ +/* + * posix-clock.h - support for dynamic clock devices + * + * Copyright (C) 2010 OMICRON electronics GmbH + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ +#ifndef _LINUX_POSIX_CLOCK_H_ +#define _LINUX_POSIX_CLOCK_H_ + +#include <linux/cdev.h> +#include <linux/fs.h> +#include <linux/poll.h> +#include <linux/posix-timers.h> + +struct posix_clock; + +/** + * struct posix_clock_operations - functional interface to the clock + * + * Every posix clock is represented by a character device. Drivers may + * optionally offer extended capabilities by implementing the + * character device methods. The character device file operations are + * first handled by the clock device layer, then passed on to the + * driver by calling these functions. + * + * @owner: The clock driver should set to THIS_MODULE + * @clock_adjtime: Adjust the clock + * @clock_gettime: Read the current time + * @clock_getres: Get the clock resolution + * @clock_settime: Set the current time value + * @timer_create: Create a new timer + * @timer_delete: Remove a previously created timer + * @timer_gettime: Get remaining time and interval of a timer + * @timer_setttime: Set a timer's initial expiration and interval + * @fasync: Optional character device fasync method + * @mmap: Optional character device mmap method + * @open: Optional character device open method + * @release: Optional character device release method + * @ioctl: Optional character device ioctl method + * @read: Optional character device read method + * @poll: Optional character device poll method + */ +struct posix_clock_operations { + struct module *owner; + + int (*clock_adjtime)(struct posix_clock *pc, struct timex *tx); + + int (*clock_gettime)(struct posix_clock *pc, struct timespec *ts); + + int (*clock_getres) (struct posix_clock *pc, struct timespec *ts); + + int (*clock_settime)(struct posix_clock *pc, + const struct timespec *ts); + + int (*timer_create) (struct posix_clock *pc, struct k_itimer *kit); + + int (*timer_delete) (struct posix_clock *pc, struct k_itimer *kit); + + void (*timer_gettime)(struct posix_clock *pc, + struct k_itimer *kit, struct itimerspec *tsp); + + int (*timer_settime)(struct posix_clock *pc, + struct k_itimer *kit, int flags, + struct itimerspec *tsp, struct itimerspec *old); + /* + * Optional character device methods: + */ + int (*fasync) (struct posix_clock *pc, + int fd, struct file *file, int on); + + long (*ioctl) (struct posix_clock *pc, + unsigned int cmd, unsigned long arg); + + int (*mmap) (struct posix_clock *pc, + struct vm_area_struct *vma); + + int (*open) (struct posix_clock *pc, fmode_t f_mode); + + uint (*poll) (struct posix_clock *pc, + struct file *file, poll_table *wait); + + int (*release) (struct posix_clock *pc); + + ssize_t (*read) (struct posix_clock *pc, + uint flags, char __user *buf, size_t cnt); +}; + +/** + * struct posix_clock - represents a dynamic posix clock + * + * @ops: Functional interface to the clock + * @cdev: Character device instance for this clock + * @kref: Reference count. + * @mutex: Protects the 'zombie' field from concurrent access. + * @zombie: If 'zombie' is true, then the hardware has disappeared. + * @release: A function to free the structure when the reference count reaches + * zero. May be NULL if structure is statically allocated. + * + * Drivers should embed their struct posix_clock within a private + * structure, obtaining a reference to it during callbacks using + * container_of(). + */ +struct posix_clock { + struct posix_clock_operations ops; + struct cdev cdev; + struct kref kref; + struct mutex mutex; + bool zombie; + void (*release)(struct posix_clock *clk); +}; + +/** + * posix_clock_register() - register a new clock + * @clk: Pointer to the clock. Caller must provide 'ops' and 'release' + * @devid: Allocated device id + * + * A clock driver calls this function to register itself with the + * clock device subsystem. If 'clk' points to dynamically allocated + * memory, then the caller must provide a 'release' function to free + * that memory. + * + * Returns zero on success, non-zero otherwise. + */ +int posix_clock_register(struct posix_clock *clk, dev_t devid); + +/** + * posix_clock_unregister() - unregister a clock + * @clk: Clock instance previously registered via posix_clock_register() + * + * A clock driver calls this function to remove itself from the clock + * device subsystem. The posix_clock itself will remain (in an + * inactive state) until its reference count drops to zero, at which + * point it will be deallocated with its 'release' method. + */ +void posix_clock_unregister(struct posix_clock *clk); + +#endif diff --git a/include/linux/posix-timers.h b/include/linux/posix-timers.h index 3e23844a6990..d51243ae0726 100644 --- a/include/linux/posix-timers.h +++ b/include/linux/posix-timers.h @@ -4,6 +4,7 @@ #include <linux/spinlock.h> #include <linux/list.h> #include <linux/sched.h> +#include <linux/timex.h> union cpu_time_count { cputime_t cpu; @@ -17,10 +18,21 @@ struct cpu_timer_list { int firing; }; +/* + * Bit fields within a clockid: + * + * The most significant 29 bits hold either a pid or a file descriptor. + * + * Bit 2 indicates whether a cpu clock refers to a thread or a process. + * + * Bits 1 and 0 give the type: PROF=0, VIRT=1, SCHED=2, or FD=3. + * + * A clockid is invalid if bits 2, 1, and 0 are all set. + */ #define CPUCLOCK_PID(clock) ((pid_t) ~((clock) >> 3)) #define CPUCLOCK_PERTHREAD(clock) \ (((clock) & (clockid_t) CPUCLOCK_PERTHREAD_MASK) != 0) -#define CPUCLOCK_PID_MASK 7 + #define CPUCLOCK_PERTHREAD_MASK 4 #define CPUCLOCK_WHICH(clock) ((clock) & (clockid_t) CPUCLOCK_CLOCK_MASK) #define CPUCLOCK_CLOCK_MASK 3 @@ -28,12 +40,17 @@ struct cpu_timer_list { #define CPUCLOCK_VIRT 1 #define CPUCLOCK_SCHED 2 #define CPUCLOCK_MAX 3 +#define CLOCKFD CPUCLOCK_MAX +#define CLOCKFD_MASK (CPUCLOCK_PERTHREAD_MASK|CPUCLOCK_CLOCK_MASK) #define MAKE_PROCESS_CPUCLOCK(pid, clock) \ ((~(clockid_t) (pid) << 3) | (clockid_t) (clock)) #define MAKE_THREAD_CPUCLOCK(tid, clock) \ MAKE_PROCESS_CPUCLOCK((tid), (clock) | CPUCLOCK_PERTHREAD_MASK) +#define FD_TO_CLOCKID(fd) ((~(clockid_t) (fd) << 3) | CLOCKFD) +#define CLOCKID_TO_FD(clk) ((unsigned int) ~((clk) >> 3)) + /* POSIX.1b interval timer structure. */ struct k_itimer { struct list_head list; /* free/ allocate list */ @@ -67,10 +84,11 @@ struct k_itimer { }; struct k_clock { - int res; /* in nanoseconds */ int (*clock_getres) (const clockid_t which_clock, struct timespec *tp); - int (*clock_set) (const clockid_t which_clock, struct timespec * tp); + int (*clock_set) (const clockid_t which_clock, + const struct timespec *tp); int (*clock_get) (const clockid_t which_clock, struct timespec * tp); + int (*clock_adj) (const clockid_t which_clock, struct timex *tx); int (*timer_create) (struct k_itimer *timer); int (*nsleep) (const clockid_t which_clock, int flags, struct timespec *, struct timespec __user *); @@ -84,28 +102,14 @@ struct k_clock { struct itimerspec * cur_setting); }; -void register_posix_clock(const clockid_t clock_id, struct k_clock *new_clock); +extern struct k_clock clock_posix_cpu; +extern struct k_clock clock_posix_dynamic; -/* error handlers for timer_create, nanosleep and settime */ -int do_posix_clock_nonanosleep(const clockid_t, int flags, struct timespec *, - struct timespec __user *); -int do_posix_clock_nosettime(const clockid_t, struct timespec *tp); +void posix_timers_register_clock(const clockid_t clock_id, struct k_clock *new_clock); /* function to call to trigger timer event */ int posix_timer_event(struct k_itimer *timr, int si_private); -int posix_cpu_clock_getres(const clockid_t which_clock, struct timespec *ts); -int posix_cpu_clock_get(const clockid_t which_clock, struct timespec *ts); -int posix_cpu_clock_set(const clockid_t which_clock, const struct timespec *ts); -int posix_cpu_timer_create(struct k_itimer *timer); -int posix_cpu_nsleep(const clockid_t which_clock, int flags, - struct timespec *rqtp, struct timespec __user *rmtp); -long posix_cpu_nsleep_restart(struct restart_block *restart_block); -int posix_cpu_timer_set(struct k_itimer *timer, int flags, - struct itimerspec *new, struct itimerspec *old); -int posix_cpu_timer_del(struct k_itimer *timer); -void posix_cpu_timer_get(struct k_itimer *timer, struct itimerspec *itp); - void posix_cpu_timer_schedule(struct k_itimer *timer); void run_posix_cpu_timers(struct task_struct *task); diff --git a/include/linux/sched.h b/include/linux/sched.h index 214af2ed11b5..c15936fe998b 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -2046,7 +2046,7 @@ extern void release_uids(struct user_namespace *ns); #include <asm/current.h> -extern void do_timer(unsigned long ticks); +extern void xtime_update(unsigned long ticks); extern int wake_up_state(struct task_struct *tsk, unsigned int state); extern int wake_up_process(struct task_struct *tsk); diff --git a/include/linux/security.h b/include/linux/security.h index b2b7f9749f5e..debbd97db7ab 100644 --- a/include/linux/security.h +++ b/include/linux/security.h @@ -53,7 +53,7 @@ struct audit_krule; */ extern int cap_capable(struct task_struct *tsk, const struct cred *cred, int cap, int audit); -extern int cap_settime(struct timespec *ts, struct timezone *tz); +extern int cap_settime(const struct timespec *ts, const struct timezone *tz); extern int cap_ptrace_access_check(struct task_struct *child, unsigned int mode); extern int cap_ptrace_traceme(struct task_struct *parent); extern int cap_capget(struct task_struct *target, kernel_cap_t *effective, kernel_cap_t *inheritable, kernel_cap_t *permitted); @@ -1387,7 +1387,7 @@ struct security_operations { int (*quotactl) (int cmds, int type, int id, struct super_block *sb); int (*quota_on) (struct dentry *dentry); int (*syslog) (int type); - int (*settime) (struct timespec *ts, struct timezone *tz); + int (*settime) (const struct timespec *ts, const struct timezone *tz); int (*vm_enough_memory) (struct mm_struct *mm, long pages); int (*bprm_set_creds) (struct linux_binprm *bprm); @@ -1669,7 +1669,7 @@ int security_sysctl(struct ctl_table *table, int op); int security_quotactl(int cmds, int type, int id, struct super_block *sb); int security_quota_on(struct dentry *dentry); int security_syslog(int type); -int security_settime(struct timespec *ts, struct timezone *tz); +int security_settime(const struct timespec *ts, const struct timezone *tz); int security_vm_enough_memory(long pages); int security_vm_enough_memory_mm(struct mm_struct *mm, long pages); int security_vm_enough_memory_kern(long pages); @@ -1904,7 +1904,8 @@ static inline int security_syslog(int type) return 0; } -static inline int security_settime(struct timespec *ts, struct timezone *tz) +static inline int security_settime(const struct timespec *ts, + const struct timezone *tz) { return cap_settime(ts, tz); } diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h index 4acc6b6088b0..1f5c18e6f4f1 100644 --- a/include/linux/syscalls.h +++ b/include/linux/syscalls.h @@ -316,6 +316,8 @@ asmlinkage long sys_clock_settime(clockid_t which_clock, const struct timespec __user *tp); asmlinkage long sys_clock_gettime(clockid_t which_clock, struct timespec __user *tp); +asmlinkage long sys_clock_adjtime(clockid_t which_clock, + struct timex __user *tx); asmlinkage long sys_clock_getres(clockid_t which_clock, struct timespec __user *tp); asmlinkage long sys_clock_nanosleep(clockid_t which_clock, int flags, diff --git a/include/linux/thread_info.h b/include/linux/thread_info.h index c90696544176..20fc303947d3 100644 --- a/include/linux/thread_info.h +++ b/include/linux/thread_info.h @@ -18,9 +18,6 @@ struct compat_timespec; struct restart_block { long (*fn)(struct restart_block *); union { - struct { - unsigned long arg0, arg1, arg2, arg3; - }; /* For futex_wait and futex_wait_requeue_pi */ struct { u32 __user *uaddr; diff --git a/include/linux/time.h b/include/linux/time.h index 1e6d3b59238d..454a26205787 100644 --- a/include/linux/time.h +++ b/include/linux/time.h @@ -113,8 +113,6 @@ static inline struct timespec timespec_sub(struct timespec lhs, #define timespec_valid(ts) \ (((ts)->tv_sec >= 0) && (((unsigned long) (ts)->tv_nsec) < NSEC_PER_SEC)) -extern seqlock_t xtime_lock; - extern void read_persistent_clock(struct timespec *ts); extern void read_boot_clock(struct timespec *ts); extern int update_persistent_clock(struct timespec now); @@ -125,8 +123,9 @@ extern int timekeeping_suspended; unsigned long get_seconds(void); struct timespec current_kernel_time(void); struct timespec __current_kernel_time(void); /* does not take xtime_lock */ -struct timespec __get_wall_to_monotonic(void); /* does not take xtime_lock */ struct timespec get_monotonic_coarse(void); +void get_xtime_and_monotonic_and_sleep_offset(struct timespec *xtim, + struct timespec *wtom, struct timespec *sleep); #define CURRENT_TIME (current_kernel_time()) #define CURRENT_TIME_SEC ((struct timespec) { get_seconds(), 0 }) @@ -147,8 +146,9 @@ static inline u32 arch_gettimeoffset(void) { return 0; } #endif extern void do_gettimeofday(struct timeval *tv); -extern int do_settimeofday(struct timespec *tv); -extern int do_sys_settimeofday(struct timespec *tv, struct timezone *tz); +extern int do_settimeofday(const struct timespec *tv); +extern int do_sys_settimeofday(const struct timespec *tv, + const struct timezone *tz); #define do_posix_clock_monotonic_gettime(ts) ktime_get_ts(ts) extern long do_utimes(int dfd, const char __user *filename, struct timespec *times, int flags); struct itimerval; @@ -162,12 +162,13 @@ extern void getnstime_raw_and_real(struct timespec *ts_raw, struct timespec *ts_real); extern void getboottime(struct timespec *ts); extern void monotonic_to_bootbased(struct timespec *ts); +extern void get_monotonic_boottime(struct timespec *ts); extern struct timespec timespec_trunc(struct timespec t, unsigned gran); extern int timekeeping_valid_for_hres(void); extern u64 timekeeping_max_deferment(void); -extern void update_wall_time(void); extern void timekeeping_leap_insert(int leapsecond); +extern int timekeeping_inject_offset(struct timespec *ts); struct tms; extern void do_sys_times(struct tms *); @@ -292,6 +293,7 @@ struct itimerval { #define CLOCK_MONOTONIC_RAW 4 #define CLOCK_REALTIME_COARSE 5 #define CLOCK_MONOTONIC_COARSE 6 +#define CLOCK_BOOTTIME 7 /* * The IDs of various hardware clocks: diff --git a/include/linux/timex.h b/include/linux/timex.h index d23999f9499d..aa60fe7b6ed6 100644 --- a/include/linux/timex.h +++ b/include/linux/timex.h @@ -73,7 +73,7 @@ struct timex { long tolerance; /* clock frequency tolerance (ppm) * (read only) */ - struct timeval time; /* (read only) */ + struct timeval time; /* (read only, except for ADJ_SETOFFSET) */ long tick; /* (modified) usecs between clock ticks */ long ppsfreq; /* pps frequency (scaled ppm) (ro) */ @@ -102,6 +102,7 @@ struct timex { #define ADJ_STATUS 0x0010 /* clock status */ #define ADJ_TIMECONST 0x0020 /* pll time constant */ #define ADJ_TAI 0x0080 /* set TAI offset */ +#define ADJ_SETOFFSET 0x0100 /* add 'time' to current time */ #define ADJ_MICRO 0x1000 /* select microsecond resolution */ #define ADJ_NANO 0x2000 /* select nanosecond resolution */ #define ADJ_TICK 0x4000 /* tick value */ |