1 files changed, 124 insertions, 0 deletions

diff --git a/kernel/tsacct.c b/kernel/tsacct.c
new file mode 100644
index 000000000000..db443221ba5b
--- /dev/null
+++ b/kernel/tsacct.c
@@ -0,0 +1,124 @@
+/*
+ * 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>
+
+
+#define USEC_PER_TICK   (USEC_PER_SEC/HZ)
+/*
+ * fill in basic accounting fields
+ */
+void bacct_add_tsk(struct taskstats *stats, struct task_struct *tsk)
+{
+        struct timespec uptime, ts;
+        s64 ac_etime;
+
+        BUILD_BUG_ON(TS_COMM_LEN < TASK_COMM_LEN);
+
+        /* calculate task elapsed time in timespec */
+        do_posix_clock_monotonic_gettime(&uptime);
+        ts = timespec_sub(uptime, current->group_leader->start_time);
+        /* rebase elapsed time to usec */
+        ac_etime = timespec_to_ns(&ts);
+        do_div(ac_etime, NSEC_PER_USEC);
+        stats->ac_etime = ac_etime;
+        stats->ac_btime = xtime.tv_sec - ts.tv_sec;
+        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_uid    = tsk->uid;
+        stats->ac_gid    = tsk->gid;
+        stats->ac_pid    = tsk->pid;
+        stats->ac_ppid   = (tsk->parent) ? tsk->parent->pid : 0;
+        stats->ac_utime  = cputime_to_msecs(tsk->utime) * USEC_PER_MSEC;
+        stats->ac_stime  = cputime_to_msecs(tsk->stime) * USEC_PER_MSEC;
+        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)
+/*
+ * fill in extended accounting fields
+ */
+void xacct_add_tsk(struct taskstats *stats, struct task_struct *p)
+{
+        /* convert pages-jiffies to Mbyte-usec */
+        stats->coremem = jiffies_to_usecs(p->acct_rss_mem1) * PAGE_SIZE / MB;
+        stats->virtmem = jiffies_to_usecs(p->acct_vm_mem1) * PAGE_SIZE / MB;
+        if (p->mm) {
+                /* adjust to KB unit */
+                stats->hiwater_rss   = p->mm->hiwater_rss * PAGE_SIZE / KB;
+                stats->hiwater_vm    = p->mm->hiwater_vm * PAGE_SIZE / KB;
+        }
+        stats->read_char        = p->rchar;
+        stats->write_char       = p->wchar;
+        stats->read_syscalls    = p->syscr;
+        stats->write_syscalls   = p->syscw;
+}
+#undef KB
+#undef MB
+
+/**
+ * acct_update_integrals - update mm integral fields in task_struct
+ * @tsk: task_struct for accounting
+ */
+void acct_update_integrals(struct task_struct *tsk)
+{
+        if (likely(tsk->mm)) {
+                long delta = cputime_to_jiffies(
+                        cputime_sub(tsk->stime, tsk->acct_stimexpd));
+
+                if (delta == 0)
+                        return;
+                tsk->acct_stimexpd = tsk->stime;
+                tsk->acct_rss_mem1 += delta * get_mm_rss(tsk->mm);
+                tsk->acct_vm_mem1 += delta * tsk->mm->total_vm;
+        }
+}
+
+/**
+ * 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_stimexpd = 0;
+        tsk->acct_rss_mem1 = 0;
+        tsk->acct_vm_mem1 = 0;
+}
+#endif