POSIX clocks & timers

diff -urP -I \$Id:.*Exp \$ -X /usr/src/patch.exclude linux-2.5.42-bk2-kb/arch/i386/kernel/time.c linux/arch/i386/kernel/time.c
@@ -136,6 +136,7 @@
 	time_maxerror = NTP_PHASE_LIMIT;
 	time_esterror = NTP_PHASE_LIMIT;
 	write_unlock_irq(&xtime_lock);
+	clock_was_set();
 }
 
 /*

diff -urP -I \$Id:.*Exp \$ -X /usr/src/patch.exclude linux-2.5.42-bk2-kb/fs/exec.c linux/fs/exec.c
@@ -756,6 +756,7 @@
 			
 	flush_signal_handlers(current);
 	flush_old_files(current->files);
+	exit_itimers(current);
 
 	return 0;
 

diff -urP -I \$Id:.*Exp \$ -X /usr/src/patch.exclude linux-2.5.42-bk2-kb/include/asm-generic/siginfo.h linux/include/asm-generic/siginfo.h
@@ -31,8 +31,9 @@
 
 		/* POSIX.1b timers */
 		struct {
-			unsigned int _timer1;
-			unsigned int _timer2;
+			timer_t _tid;		/* timer id */
+			int _overrun;		/* overrun count */
+			sigval_t _sigval;	/* same as below */
 		} _timer;
 
 		/* POSIX.1b signals */

@@ -71,8 +72,8 @@
  */
 #define si_pid		_sifields._kill._pid
 #define si_uid		_sifields._kill._uid
-#define si_timer1	_sifields._timer._timer1
-#define si_timer2	_sifields._timer._timer2
+#define si_tid		_sifields._timer._tid
+#define si_overrun	_sifields._timer._overrun
 #define si_status	_sifields._sigchld._status
 #define si_utime	_sifields._sigchld._utime
 #define si_stime	_sifields._sigchld._stime

@@ -203,6 +204,7 @@
 #define SIGEV_SIGNAL	0	/* notify via signal */
 #define SIGEV_NONE	1	/* other notification: meaningless */
 #define SIGEV_THREAD	2	/* deliver via thread creation */
+#define SIGEV_THREAD_ID 4	/* deliver to thread */
 
 #define SIGEV_MAX_SIZE	64
 #ifndef SIGEV_PAD_SIZE

@@ -217,6 +219,7 @@
 	int sigev_notify;
 	union {
 		int _pad[SIGEV_PAD_SIZE];
+		 int _tid;
 
 		struct {
 			void (*_function)(sigval_t);

@@ -229,6 +232,7 @@
 
 #define sigev_notify_function	_sigev_un._sigev_thread._function
 #define sigev_notify_attributes	_sigev_un._sigev_thread._attribute
+#define sigev_notify_thread_id	 _sigev_un._tid
 
 #ifdef __KERNEL__
 

diff -urP -I \$Id:.*Exp \$ -X /usr/src/patch.exclude linux-2.5.42-bk2-kb/include/asm-i386/posix_types.h linux/include/asm-i386/posix_types.h
@@ -22,6 +22,8 @@
 typedef long		__kernel_time_t;
 typedef long		__kernel_suseconds_t;
 typedef long		__kernel_clock_t;
+typedef int		__kernel_timer_t;
+typedef int		__kernel_clockid_t;
 typedef int		__kernel_daddr_t;
 typedef char *		__kernel_caddr_t;
 typedef unsigned short	__kernel_uid16_t;

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diff -urP -I \$Id:.*Exp \$ -X /usr/src/patch.exclude linux-2.5.42-bk2-kb/include/asm-i386/unistd.h linux/include/asm-i386/unistd.h
@@ -257,6 +257,15 @@
 #define __NR_alloc_hugepages	250
 #define __NR_free_hugepages	251
 #define __NR_exit_group		252
+#define __NR_timer_create	253
+#define __NR_timer_settime	(__NR_timer_create+1)
+#define __NR_timer_gettime	(__NR_timer_create+2)
+#define __NR_timer_getoverrun	(__NR_timer_create+3)
+#define __NR_timer_delete	(__NR_timer_create+4)
+#define __NR_clock_settime	 (__NR_timer_create+5)
+#define __NR_clock_gettime	 (__NR_timer_create+6)
+#define __NR_clock_getres	 (__NR_timer_create+7)
+#define __NR_clock_nanosleep	 (__NR_timer_create+8)
 
 /* user-visible error numbers are in the range -1 - -124: see <asm-i386/errno.h> */
 

diff -urP -I \$Id:.*Exp \$ -X /usr/src/patch.exclude linux-2.5.42-bk2-kb/include/linux/init_task.h linux/include/linux/init_task.h
@@ -93,6 +93,7 @@
 	.sig		= &init_signals,				\
 	.pending	= { NULL, &tsk.pending.head, {{0}}},		\
 	.blocked	= {{0}},					\
+	 .posix_timers	 = LIST_HEAD_INIT(tsk.posix_timers),		   \
 	.alloc_lock	= SPIN_LOCK_UNLOCKED,				\
 	.switch_lock	= SPIN_LOCK_UNLOCKED,				\
 	.journal_info	= NULL,						\

diff -urP -I \$Id:.*Exp \$ -X /usr/src/patch.exclude linux-2.5.42-bk2-kb/include/linux/posix-timers.h linux/include/linux/posix-timers.h
@@ -0,0 +1,18 @@
+#ifndef _linux_POSIX_TIMERS_H
+#define _linux_POSIX_TIMERS_H
+
+struct k_clock {
+	 int  res;		    /* in nano seconds */
+	 int ( *clock_set)(struct timespec *tp);
+	 int ( *clock_get)(struct timespec *tp);
+	 int ( *nsleep)(   int flags, 
+			   struct timespec*new_setting,
+			   struct itimerspec *old_setting);
+	 int ( *timer_set)(struct k_itimer *timr, int flags,
+			   struct itimerspec *new_setting,
+			   struct itimerspec *old_setting);
+	 int  ( *timer_del)(struct k_itimer *timr);
+	 void ( *timer_get)(struct k_itimer *timr,
+			   struct itimerspec *cur_setting);
+};
+#endif

diff -urP -I \$Id:.*Exp \$ -X /usr/src/patch.exclude linux-2.5.42-bk2-kb/include/linux/sched.h linux/include/linux/sched.h
@@ -278,6 +278,30 @@
 typedef struct prio_array prio_array_t;
 struct backing_dev_info;
 
+/* POSIX.1b interval timer structure. */
+struct k_itimer {
+	struct list_head list;		 /* free/ allocate list */
+	spinlock_t it_lock;
+	clockid_t it_clock;		/* which timer type */
+	timer_t it_id;			/* timer id */
+	int it_overrun;			/* overrun on pending signal  */
+	int it_overrun_last;		 /* overrun on last delivered signal */
+	int it_overrun_deferred;	 /* overrun on pending timer interrupt */
+	int it_sigev_notify;		 /* notify word of sigevent struct */
+	int it_sigev_signo;		 /* signo word of sigevent struct */
+	sigval_t it_sigev_value;	 /* value word of sigevent struct */
+	unsigned long it_incr;		/* interval specified in jiffies */
+#ifdef CONFIG_HIGH_RES_TIMERS
+	 int it_sub_incr;		 /* sub jiffie part of interval */
+#endif
+	struct task_struct *it_process;	/* process to send signal to */
+	struct timer_list it_timer;
+};
+
+
+//extern struct itimer_struct *itimer_struct_new(void);
+extern void itimer_delete(struct k_itimer *timers);
+
 struct task_struct {
 	volatile long state;	/* -1 unrunnable, 0 runnable, >0 stopped */
 	struct thread_info *thread_info;

@@ -343,6 +367,7 @@
 	unsigned long it_real_value, it_prof_value, it_virt_value;
 	unsigned long it_real_incr, it_prof_incr, it_virt_incr;
 	struct timer_list real_timer;
+	struct list_head posix_timers; /* POSIX.1b Interval Timers */
 	unsigned long utime, stime, cutime, cstime;
 	unsigned long start_time;
 	long per_cpu_utime[NR_CPUS], per_cpu_stime[NR_CPUS];

@@ -651,6 +676,7 @@
 
 extern void exit_mm(struct task_struct *);
 extern void exit_files(struct task_struct *);
+extern void exit_itimers(struct task_struct *);
 extern void exit_sighand(struct task_struct *);
 extern void __exit_sighand(struct task_struct *);
 

diff -urP -I \$Id:.*Exp \$ -X /usr/src/patch.exclude linux-2.5.42-bk2-kb/include/linux/signal.h linux/include/linux/signal.h
@@ -224,6 +224,36 @@
 struct pt_regs;
 extern int get_signal_to_deliver(siginfo_t *info, struct pt_regs *regs);
 #endif
+/*
+ * We would like the asm/signal.h code to define these so that the using
+ * function can call do_signal().  In loo of that, we define a genaric
+ * version that pretends that do_signal() was called and delivered a signal.
+ * To see how this is used, see nano_sleep() in timer.c and the i386 version
+ * in asm_i386/signal.h.
+ */
+#ifndef PT_REGS_ENTRY
+#define PT_REGS_ENTRY(type,name,p1_type,p1, p2_type,p2) \
+type name(p1_type p1,p2_type p2)\
+{
+#endif
+#ifndef _do_signal
+#define _do_signal() 1
+#endif
+#ifndef NANOSLEEP_ENTRY
+#define NANOSLEEP_ENTRY(a) asmlinkage long sys_nanosleep( struct timespec* rqtp, \
+							  struct timespec * rmtp) \
+{ a
+#endif
+#ifndef CLOCK_NANOSLEEP_ENTRY
+#define CLOCK_NANOSLEEP_ENTRY(a) asmlinkage long sys_clock_nanosleep( \
+			       clockid_t which_clock,	   \
+			       int flags,		   \
+			       const struct timespec *rqtp, \
+			       struct timespec *rmtp)	    \
+{ a
+ 
+#endif
+
 
 #endif /* __KERNEL__ */
 

diff -urP -I \$Id:.*Exp \$ -X /usr/src/patch.exclude linux-2.5.42-bk2-kb/include/linux/sys.h linux/include/linux/sys.h
@@ -4,7 +4,7 @@
 /*
  * system call entry points ... but not all are defined
  */
-#define NR_syscalls 256
+#define NR_syscalls 275
 
 /*
  * These are system calls that will be removed at some time

diff -urP -I \$Id:.*Exp \$ -X /usr/src/patch.exclude linux-2.5.42-bk2-kb/include/linux/time.h linux/include/linux/time.h
@@ -38,6 +38,19 @@
  */
 #define MAX_JIFFY_OFFSET ((~0UL >> 1)-1)
 
+/* Parameters used to convert the timespec values */
+#ifndef USEC_PER_SEC
+#define USEC_PER_SEC (1000000L)
+#endif
+
+#ifndef NSEC_PER_SEC
+#define NSEC_PER_SEC (1000000000L)
+#endif
+
+#ifndef NSEC_PER_USEC
+#define NSEC_PER_USEC (1000L)
+#endif
+
 static __inline__ unsigned long
 timespec_to_jiffies(struct timespec *value)
 {

@@ -124,6 +137,8 @@
 #ifdef __KERNEL__
 extern void do_gettimeofday(struct timeval *tv);
 extern void do_settimeofday(struct timeval *tv);
+extern int do_sys_settimeofday(struct timeval *tv, struct timezone *tz);
+extern void clock_was_set(void); // call when ever the clock is set
 #endif
 
 #define FD_SETSIZE		__FD_SETSIZE

@@ -149,5 +164,25 @@
 	struct	timeval it_interval;	/* timer interval */
 	struct	timeval it_value;	/* current value */
 };
+
+
+/*
+ * The IDs of the various system clocks (for POSIX.1b interval timers).
+ */
+#define CLOCK_REALTIME		  0
+#define CLOCK_MONOTONIC	  1
+#define CLOCK_PROCESS_CPUTIME_ID 2
+#define CLOCK_THREAD_CPUTIME_ID	 3
+#define CLOCK_REALTIME_HR	 4
+#define CLOCK_MONOTONIC_HR	  5
+
+#define MAX_CLOCKS 6
+
+/*
+ * The various flags for setting POSIX.1b interval timers.
+ */
+
+#define TIMER_ABSTIME 0x01
+
 
 #endif

diff -urP -I \$Id:.*Exp \$ -X /usr/src/patch.exclude linux-2.5.42-bk2-kb/include/linux/types.h linux/include/linux/types.h
@@ -23,6 +23,8 @@
 typedef __kernel_daddr_t	daddr_t;
 typedef __kernel_key_t		key_t;
 typedef __kernel_suseconds_t	suseconds_t;
+typedef __kernel_timer_t	timer_t;
+typedef __kernel_clockid_t	clockid_t;
 
 #ifdef __KERNEL__
 typedef __kernel_uid32_t	uid_t;

diff -urP -I \$Id:.*Exp \$ -X /usr/src/patch.exclude linux-2.5.42-bk2-kb/kernel/exit.c linux/kernel/exit.c
@@ -408,6 +408,21 @@
 	mmdrop(active_mm);
 }
 
+static inline void __exit_itimers(struct task_struct *tsk)
+{
+	struct	k_itimer *tmr;
+
+	while (tsk->posix_timers.next != &tsk->posix_timers){
+		 tmr = list_entry(tsk->posix_timers.next,struct k_itimer,list);
+		itimer_delete(tmr);
+	}
+}
+
+void exit_itimers(struct task_struct *tsk)
+{
+	__exit_itimers(tsk);
+}
+
 /*
  * Turn us into a lazy TLB process if we
  * aren't already..

@@ -643,6 +658,7 @@
 	__exit_files(tsk);
 	__exit_fs(tsk);
 	exit_namespace(tsk);
+	__exit_itimers(tsk);
 	exit_thread();
 
 	if (current->leader)

diff -urP -I \$Id:.*Exp \$ -X /usr/src/patch.exclude linux-2.5.42-bk2-kb/kernel/fork.c linux/kernel/fork.c
@@ -783,6 +783,7 @@
 		goto bad_fork_cleanup_files;
 	if (copy_sighand(clone_flags, p))
 		goto bad_fork_cleanup_fs;
+	INIT_LIST_HEAD(&p->posix_timers);
 	if (copy_mm(clone_flags, p))
 		goto bad_fork_cleanup_sighand;
 	if (copy_namespace(clone_flags, p))

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