[linux-2.6-block.git] / kernel / tsacct.c

/*
 * tsacct.c - System accounting over taskstats interface
 *
 * Copyright (C) Jay Lan,	<jlan@sgi.com>
 *
 *
 * 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.
 *
 */

#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/tsacct_kern.h>
#include <linux/acct.h>
#include <linux/jiffies.h>
#include <linux/mm.h>

/*
 * fill in basic accounting fields
 */
void bacct_add_tsk(struct user_namespace *user_ns,
		   struct pid_namespace *pid_ns,
		   struct taskstats *stats, struct task_struct *tsk)
{
	const struct cred *tcred;
	cputime_t utime, stime, utimescaled, stimescaled;
	u64 delta;

	BUILD_BUG_ON(TS_COMM_LEN < TASK_COMM_LEN);

	/* calculate task elapsed time in nsec */
	delta = ktime_get_ns() - tsk->start_time;
	/* Convert to micro seconds */
	do_div(delta, NSEC_PER_USEC);
	stats->ac_etime = delta;
	/* Convert to seconds for btime */
	do_div(delta, USEC_PER_SEC);
	stats->ac_btime = get_seconds() - delta;
	if (thread_group_leader(tsk)) {
		stats->ac_exitcode = tsk->exit_code;
		if (tsk->flags & PF_FORKNOEXEC)
			stats->ac_flag |= AFORK;
	}
	if (tsk->flags & PF_SUPERPRIV)
		stats->ac_flag |= ASU;
	if (tsk->flags & PF_DUMPCORE)
		stats->ac_flag |= ACORE;
	if (tsk->flags & PF_SIGNALED)
		stats->ac_flag |= AXSIG;
	stats->ac_nice	 = task_nice(tsk);
	stats->ac_sched	 = tsk->policy;
	stats->ac_pid	 = task_pid_nr_ns(tsk, pid_ns);
	rcu_read_lock();
	tcred = __task_cred(tsk);
	stats->ac_uid	 = from_kuid_munged(user_ns, tcred->uid);
	stats->ac_gid	 = from_kgid_munged(user_ns, tcred->gid);
	stats->ac_ppid	 = pid_alive(tsk) ?
		task_tgid_nr_ns(rcu_dereference(tsk->real_parent), pid_ns) : 0;
	rcu_read_unlock();

	task_cputime(tsk, &utime, &stime);
	stats->ac_utime = cputime_to_usecs(utime);
	stats->ac_stime = cputime_to_usecs(stime);

	task_cputime_scaled(tsk, &utimescaled, &stimescaled);
	stats->ac_utimescaled = cputime_to_usecs(utimescaled);
	stats->ac_stimescaled = cputime_to_usecs(stimescaled);

	stats->ac_minflt = tsk->min_flt;
	stats->ac_majflt = tsk->maj_flt;

	strncpy(stats->ac_comm, tsk->comm, sizeof(stats->ac_comm));
}


#ifdef CONFIG_TASK_XACCT

#define KB 1024
#define MB (1024*KB)
#define KB_MASK (~(KB-1))
/*
 * fill in extended accounting fields
 */
void xacct_add_tsk(struct taskstats *stats, struct task_struct *p)
{
	struct mm_struct *mm;

	/* convert pages-usec to Mbyte-usec */
	stats->coremem = p->acct_rss_mem1 * PAGE_SIZE / MB;
	stats->virtmem = p->acct_vm_mem1 * PAGE_SIZE / MB;
	mm = get_task_mm(p);
	if (mm) {
		/* adjust to KB unit */
		stats->hiwater_rss   = get_mm_hiwater_rss(mm) * PAGE_SIZE / KB;
		stats->hiwater_vm    = get_mm_hiwater_vm(mm)  * PAGE_SIZE / KB;
		mmput(mm);
	}
	stats->read_char	= p->ioac.rchar & KB_MASK;
	stats->write_char	= p->ioac.wchar & KB_MASK;
	stats->read_syscalls	= p->ioac.syscr & KB_MASK;
	stats->write_syscalls	= p->ioac.syscw & KB_MASK;
#ifdef CONFIG_TASK_IO_ACCOUNTING
	stats->read_bytes	= p->ioac.read_bytes & KB_MASK;
	stats->write_bytes	= p->ioac.write_bytes & KB_MASK;
	stats->cancelled_write_bytes = p->ioac.cancelled_write_bytes & KB_MASK;
#else
	stats->read_bytes	= 0;
	stats->write_bytes	= 0;
	stats->cancelled_write_bytes = 0;
#endif
}
#undef KB
#undef MB

static void __acct_update_integrals(struct task_struct *tsk,
				    cputime_t utime, cputime_t stime)
{
	if (likely(tsk->mm)) {
		cputime_t time, dtime;
		struct timeval value;
		unsigned long flags;
		u64 delta;

		local_irq_save(flags);
		time = stime + utime;
		dtime = time - tsk->acct_timexpd;
		jiffies_to_timeval(cputime_to_jiffies(dtime), &value);
		delta = value.tv_sec;
		delta = delta * USEC_PER_SEC + value.tv_usec;

		if (delta == 0)
			goto out;
		tsk->acct_timexpd = time;
		tsk->acct_rss_mem1 += delta * get_mm_rss(tsk->mm);
		tsk->acct_vm_mem1 += delta * tsk->mm->total_vm;
	out:
		local_irq_restore(flags);
	}
}

/**
 * acct_update_integrals - update mm integral fields in task_struct
 * @tsk: task_struct for accounting
 */
void acct_update_integrals(struct task_struct *tsk)
{
	cputime_t utime, stime;

	task_cputime(tsk, &utime, &stime);
	__acct_update_integrals(tsk, utime, stime);
}

/**
 * acct_account_cputime - update mm integral after cputime update
 * @tsk: task_struct for accounting
 */
void acct_account_cputime(struct task_struct *tsk)
{
	__acct_update_integrals(tsk, tsk->utime, tsk->stime);
}

/**
 * acct_clear_integrals - clear the mm integral fields in task_struct
 * @tsk: task_struct whose accounting fields are cleared
 */
void acct_clear_integrals(struct task_struct *tsk)
{
	tsk->acct_timexpd = 0;
	tsk->acct_rss_mem1 = 0;
	tsk->acct_vm_mem1 = 0;
}
#endif
Commit	Line	Data
	1	/*
	2	* tsacct.c - System accounting over taskstats interface
	3	*
	4	* Copyright (C) Jay Lan, <jlan@sgi.com>
	5	*
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License as published by
	9	* the Free Software Foundation; either version 2 of the License, or
	10	* (at your option) any later version.
	11	*
	12	* This program is distributed in the hope that it will be useful,
	13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	* GNU General Public License for more details.
	16	*
	17	*/
	18
	19	#include <linux/kernel.h>
	20	#include <linux/sched.h>
	21	#include <linux/tsacct_kern.h>
	22	#include <linux/acct.h>
	23	#include <linux/jiffies.h>
	24	#include <linux/mm.h>
	25
	26	/*
	27	* fill in basic accounting fields
	28	*/
	29	void bacct_add_tsk(struct user_namespace *user_ns,
	30	struct pid_namespace *pid_ns,
	31	struct taskstats stats, struct task_struct tsk)
	32	{
	33	const struct cred *tcred;
	34	cputime_t utime, stime, utimescaled, stimescaled;
	35	u64 delta;
	36
	37	BUILD_BUG_ON(TS_COMM_LEN < TASK_COMM_LEN);
	38
	39	/* calculate task elapsed time in nsec */
	40	delta = ktime_get_ns() - tsk->start_time;
	41	/* Convert to micro seconds */
	42	do_div(delta, NSEC_PER_USEC);
	43	stats->ac_etime = delta;
	44	/* Convert to seconds for btime */
	45	do_div(delta, USEC_PER_SEC);
	46	stats->ac_btime = get_seconds() - delta;
	47	if (thread_group_leader(tsk)) {
	48	stats->ac_exitcode = tsk->exit_code;
	49	if (tsk->flags & PF_FORKNOEXEC)
	50	stats->ac_flag \|= AFORK;
	51	}
	52	if (tsk->flags & PF_SUPERPRIV)
	53	stats->ac_flag \|= ASU;
	54	if (tsk->flags & PF_DUMPCORE)
	55	stats->ac_flag \|= ACORE;
	56	if (tsk->flags & PF_SIGNALED)
	57	stats->ac_flag \|= AXSIG;
	58	stats->ac_nice = task_nice(tsk);
	59	stats->ac_sched = tsk->policy;
	60	stats->ac_pid = task_pid_nr_ns(tsk, pid_ns);
	61	rcu_read_lock();
	62	tcred = __task_cred(tsk);
	63	stats->ac_uid = from_kuid_munged(user_ns, tcred->uid);
	64	stats->ac_gid = from_kgid_munged(user_ns, tcred->gid);
	65	stats->ac_ppid = pid_alive(tsk) ?
	66	task_tgid_nr_ns(rcu_dereference(tsk->real_parent), pid_ns) : 0;
	67	rcu_read_unlock();
	68
	69	task_cputime(tsk, &utime, &stime);
	70	stats->ac_utime = cputime_to_usecs(utime);
	71	stats->ac_stime = cputime_to_usecs(stime);
	72
	73	task_cputime_scaled(tsk, &utimescaled, &stimescaled);
	74	stats->ac_utimescaled = cputime_to_usecs(utimescaled);
	75	stats->ac_stimescaled = cputime_to_usecs(stimescaled);
	76
	77	stats->ac_minflt = tsk->min_flt;
	78	stats->ac_majflt = tsk->maj_flt;
	79
	80	strncpy(stats->ac_comm, tsk->comm, sizeof(stats->ac_comm));
	81	}
	82
	83
	84	#ifdef CONFIG_TASK_XACCT
	85
	86	#define KB 1024
	87	#define MB (1024*KB)
	88	#define KB_MASK (~(KB-1))
	89	/*
	90	* fill in extended accounting fields
	91	*/
	92	void xacct_add_tsk(struct taskstats stats, struct task_struct p)
	93	{
	94	struct mm_struct *mm;
	95
	96	/* convert pages-usec to Mbyte-usec */
	97	stats->coremem = p->acct_rss_mem1 * PAGE_SIZE / MB;
	98	stats->virtmem = p->acct_vm_mem1 * PAGE_SIZE / MB;
	99	mm = get_task_mm(p);
	100	if (mm) {
	101	/* adjust to KB unit */
	102	stats->hiwater_rss = get_mm_hiwater_rss(mm) * PAGE_SIZE / KB;
	103	stats->hiwater_vm = get_mm_hiwater_vm(mm) * PAGE_SIZE / KB;
	104	mmput(mm);
	105	}
	106	stats->read_char = p->ioac.rchar & KB_MASK;
	107	stats->write_char = p->ioac.wchar & KB_MASK;
	108	stats->read_syscalls = p->ioac.syscr & KB_MASK;
	109	stats->write_syscalls = p->ioac.syscw & KB_MASK;
	110	#ifdef CONFIG_TASK_IO_ACCOUNTING
	111	stats->read_bytes = p->ioac.read_bytes & KB_MASK;
	112	stats->write_bytes = p->ioac.write_bytes & KB_MASK;
	113	stats->cancelled_write_bytes = p->ioac.cancelled_write_bytes & KB_MASK;
	114	#else
	115	stats->read_bytes = 0;
	116	stats->write_bytes = 0;
	117	stats->cancelled_write_bytes = 0;
	118	#endif
	119	}
	120	#undef KB
	121	#undef MB
	122
	123	static void __acct_update_integrals(struct task_struct *tsk,
	124	cputime_t utime, cputime_t stime)
	125	{
	126	if (likely(tsk->mm)) {
	127	cputime_t time, dtime;
	128	struct timeval value;
	129	unsigned long flags;
	130	u64 delta;
	131
	132	local_irq_save(flags);
	133	time = stime + utime;
	134	dtime = time - tsk->acct_timexpd;
	135	jiffies_to_timeval(cputime_to_jiffies(dtime), &value);
	136	delta = value.tv_sec;
	137	delta = delta * USEC_PER_SEC + value.tv_usec;
	138
	139	if (delta == 0)
	140	goto out;
	141	tsk->acct_timexpd = time;
	142	tsk->acct_rss_mem1 += delta * get_mm_rss(tsk->mm);
	143	tsk->acct_vm_mem1 += delta * tsk->mm->total_vm;
	144	out:
	145	local_irq_restore(flags);
	146	}
	147	}
	148
	149	/**
	150	* acct_update_integrals - update mm integral fields in task_struct
	151	* @tsk: task_struct for accounting
	152	*/
	153	void acct_update_integrals(struct task_struct *tsk)
	154	{
	155	cputime_t utime, stime;
	156
	157	task_cputime(tsk, &utime, &stime);
	158	__acct_update_integrals(tsk, utime, stime);
	159	}
	160
	161	/**
	162	* acct_account_cputime - update mm integral after cputime update
	163	* @tsk: task_struct for accounting
	164	*/
	165	void acct_account_cputime(struct task_struct *tsk)
	166	{
	167	__acct_update_integrals(tsk, tsk->utime, tsk->stime);
	168	}
	169
	170	/**
	171	* acct_clear_integrals - clear the mm integral fields in task_struct
	172	* @tsk: task_struct whose accounting fields are cleared
	173	*/
	174	void acct_clear_integrals(struct task_struct *tsk)
	175	{
	176	tsk->acct_timexpd = 0;
	177	tsk->acct_rss_mem1 = 0;
	178	tsk->acct_vm_mem1 = 0;
	179	}
	180	#endif