mfd: Support 88pm8606 in 860x driver
[linux-2.6.git] / kernel / tsacct.c
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 taskstats *stats, struct task_struct *tsk)
30 {
31         const struct cred *tcred;
32         struct timespec uptime, ts;
33         u64 ac_etime;
34
35         BUILD_BUG_ON(TS_COMM_LEN < TASK_COMM_LEN);
36
37         /* calculate task elapsed time in timespec */
38         do_posix_clock_monotonic_gettime(&uptime);
39         ts = timespec_sub(uptime, tsk->start_time);
40         /* rebase elapsed time to usec (should never be negative) */
41         ac_etime = timespec_to_ns(&ts);
42         do_div(ac_etime, NSEC_PER_USEC);
43         stats->ac_etime = ac_etime;
44         stats->ac_btime = get_seconds() - ts.tv_sec;
45         if (thread_group_leader(tsk)) {
46                 stats->ac_exitcode = tsk->exit_code;
47                 if (tsk->flags & PF_FORKNOEXEC)
48                         stats->ac_flag |= AFORK;
49         }
50         if (tsk->flags & PF_SUPERPRIV)
51                 stats->ac_flag |= ASU;
52         if (tsk->flags & PF_DUMPCORE)
53                 stats->ac_flag |= ACORE;
54         if (tsk->flags & PF_SIGNALED)
55                 stats->ac_flag |= AXSIG;
56         stats->ac_nice   = task_nice(tsk);
57         stats->ac_sched  = tsk->policy;
58         stats->ac_pid    = tsk->pid;
59         rcu_read_lock();
60         tcred = __task_cred(tsk);
61         stats->ac_uid    = tcred->uid;
62         stats->ac_gid    = tcred->gid;
63         stats->ac_ppid   = pid_alive(tsk) ?
64                                 rcu_dereference(tsk->real_parent)->tgid : 0;
65         rcu_read_unlock();
66         stats->ac_utime  = cputime_to_msecs(tsk->utime) * USEC_PER_MSEC;
67         stats->ac_stime  = cputime_to_msecs(tsk->stime) * USEC_PER_MSEC;
68         stats->ac_utimescaled =
69                 cputime_to_msecs(tsk->utimescaled) * USEC_PER_MSEC;
70         stats->ac_stimescaled =
71                 cputime_to_msecs(tsk->stimescaled) * USEC_PER_MSEC;
72         stats->ac_minflt = tsk->min_flt;
73         stats->ac_majflt = tsk->maj_flt;
74
75         strncpy(stats->ac_comm, tsk->comm, sizeof(stats->ac_comm));
76 }
77
78
79 #ifdef CONFIG_TASK_XACCT
80
81 #define KB 1024
82 #define MB (1024*KB)
83 /*
84  * fill in extended accounting fields
85  */
86 void xacct_add_tsk(struct taskstats *stats, struct task_struct *p)
87 {
88         struct mm_struct *mm;
89
90         /* convert pages-usec to Mbyte-usec */
91         stats->coremem = p->acct_rss_mem1 * PAGE_SIZE / MB;
92         stats->virtmem = p->acct_vm_mem1 * PAGE_SIZE / MB;
93         mm = get_task_mm(p);
94         if (mm) {
95                 /* adjust to KB unit */
96                 stats->hiwater_rss   = get_mm_hiwater_rss(mm) * PAGE_SIZE / KB;
97                 stats->hiwater_vm    = get_mm_hiwater_vm(mm)  * PAGE_SIZE / KB;
98                 mmput(mm);
99         }
100         stats->read_char        = p->ioac.rchar;
101         stats->write_char       = p->ioac.wchar;
102         stats->read_syscalls    = p->ioac.syscr;
103         stats->write_syscalls   = p->ioac.syscw;
104 #ifdef CONFIG_TASK_IO_ACCOUNTING
105         stats->read_bytes       = p->ioac.read_bytes;
106         stats->write_bytes      = p->ioac.write_bytes;
107         stats->cancelled_write_bytes = p->ioac.cancelled_write_bytes;
108 #else
109         stats->read_bytes       = 0;
110         stats->write_bytes      = 0;
111         stats->cancelled_write_bytes = 0;
112 #endif
113 }
114 #undef KB
115 #undef MB
116
117 /**
118  * acct_update_integrals - update mm integral fields in task_struct
119  * @tsk: task_struct for accounting
120  */
121 void acct_update_integrals(struct task_struct *tsk)
122 {
123         if (likely(tsk->mm)) {
124                 cputime_t time, dtime;
125                 struct timeval value;
126                 unsigned long flags;
127                 u64 delta;
128
129                 local_irq_save(flags);
130                 time = tsk->stime + tsk->utime;
131                 dtime = cputime_sub(time, tsk->acct_timexpd);
132                 jiffies_to_timeval(cputime_to_jiffies(dtime), &value);
133                 delta = value.tv_sec;
134                 delta = delta * USEC_PER_SEC + value.tv_usec;
135
136                 if (delta == 0)
137                         goto out;
138                 tsk->acct_timexpd = time;
139                 tsk->acct_rss_mem1 += delta * get_mm_rss(tsk->mm);
140                 tsk->acct_vm_mem1 += delta * tsk->mm->total_vm;
141         out:
142                 local_irq_restore(flags);
143         }
144 }
145
146 /**
147  * acct_clear_integrals - clear the mm integral fields in task_struct
148  * @tsk: task_struct whose accounting fields are cleared
149  */
150 void acct_clear_integrals(struct task_struct *tsk)
151 {
152         tsk->acct_timexpd = 0;
153         tsk->acct_rss_mem1 = 0;
154         tsk->acct_vm_mem1 = 0;
155 }
156 #endif