Adding upstream version 6.1.76.upstream/6.1.76upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 182 insertions, 0 deletions

diff --git a/kernel/tsacct.c b/kernel/tsacct.c
new file mode 100644
index 000000000..4252f0645
--- /dev/null
+++ b/kernel/tsacct.c
@@ -0,0 +1,182 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * tsacct.c - System accounting over taskstats interface
+ *
+ * Copyright (C) Jay Lan,	<jlan@sgi.com>
+ */
+
+#include <linux/kernel.h>
+#include <linux/sched/signal.h>
+#include <linux/sched/mm.h>
+#include <linux/sched/cputime.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;
+	u64 utime, stime, utimescaled, stimescaled;
+	u64 now_ns, delta;
+	time64_t btime;
+
+	BUILD_BUG_ON(TS_COMM_LEN < TASK_COMM_LEN);
+
+	/* calculate task elapsed time in nsec */
+	now_ns = ktime_get_ns();
+	/* store whole group time first */
+	delta = now_ns - tsk->group_leader->start_time;
+	/* Convert to micro seconds */
+	do_div(delta, NSEC_PER_USEC);
+	stats->ac_tgetime = delta;
+	delta = now_ns - tsk->start_time;
+	do_div(delta, NSEC_PER_USEC);
+	stats->ac_etime = delta;
+	/* Convert to seconds for btime (note y2106 limit) */
+	btime = ktime_get_real_seconds() - div_u64(delta, USEC_PER_SEC);
+	stats->ac_btime = clamp_t(time64_t, btime, 0, U32_MAX);
+	stats->ac_btime64 = btime;
+
+	if (tsk->flags & PF_EXITING)
+		stats->ac_exitcode = tsk->exit_code;
+	if (thread_group_leader(tsk) && (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);
+	stats->ac_tgid   = task_tgid_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 = div_u64(utime, NSEC_PER_USEC);
+	stats->ac_stime = div_u64(stime, NSEC_PER_USEC);
+
+	task_cputime_scaled(tsk, &utimescaled, &stimescaled);
+	stats->ac_utimescaled = div_u64(utimescaled, NSEC_PER_USEC);
+	stats->ac_stimescaled = div_u64(stimescaled, NSEC_PER_USEC);
+
+	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-nsec/1024 to Mbyte-usec, see __acct_update_integrals */
+	stats->coremem = p->acct_rss_mem1 * PAGE_SIZE;
+	do_div(stats->coremem, 1000 * KB);
+	stats->virtmem = p->acct_vm_mem1 * PAGE_SIZE;
+	do_div(stats->virtmem, 1000 * KB);
+	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,
+				    u64 utime, u64 stime)
+{
+	u64 time, delta;
+
+	if (!likely(tsk->mm))
+		return;
+
+	time = stime + utime;
+	delta = time - tsk->acct_timexpd;
+
+	if (delta < TICK_NSEC)
+		return;
+
+	tsk->acct_timexpd = time;
+	/*
+	 * Divide by 1024 to avoid overflow, and to avoid division.
+	 * The final unit reported to userspace is Mbyte-usecs,
+	 * the rest of the math is done in xacct_add_tsk.
+	 */
+	tsk->acct_rss_mem1 += delta * get_mm_rss(tsk->mm) >> 10;
+	tsk->acct_vm_mem1 += delta * READ_ONCE(tsk->mm->total_vm) >> 10;
+}
+
+/**
+ * acct_update_integrals - update mm integral fields in task_struct
+ * @tsk: task_struct for accounting
+ */
+void acct_update_integrals(struct task_struct *tsk)
+{
+	u64 utime, stime;
+	unsigned long flags;
+
+	local_irq_save(flags);
+	task_cputime(tsk, &utime, &stime);
+	__acct_update_integrals(tsk, utime, stime);
+	local_irq_restore(flags);
+}
+
+/**
+ * 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