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4bd6e32ace
- Explicitly limit exit task stat broadcast to the initial user and pid namespaces, as it is already limited to the initial network namespace. - For broadcast task stats explicitly generate all of the idenitiers in terms of the initial user namespace and the initial pid namespace. - For request stats report them in terms of the current user namespace and the current pid namespace. Netlink messages are delivered syncrhonously to the kernel allowing us to get the user namespace and the pid namespace from the current task. - Pass the namespaces for representing pids and uids and gids into bacct_add_task. Cc: Balbir Singh <bsingharora@gmail.com> Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
158 lines
4.4 KiB
C
158 lines
4.4 KiB
C
/*
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* tsacct.c - System accounting over taskstats interface
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*
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* Copyright (C) Jay Lan, <jlan@sgi.com>
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*
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/tsacct_kern.h>
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#include <linux/acct.h>
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#include <linux/jiffies.h>
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#include <linux/mm.h>
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/*
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* fill in basic accounting fields
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*/
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void bacct_add_tsk(struct user_namespace *user_ns,
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struct pid_namespace *pid_ns,
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struct taskstats *stats, struct task_struct *tsk)
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{
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const struct cred *tcred;
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struct timespec uptime, ts;
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u64 ac_etime;
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BUILD_BUG_ON(TS_COMM_LEN < TASK_COMM_LEN);
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/* calculate task elapsed time in timespec */
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do_posix_clock_monotonic_gettime(&uptime);
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ts = timespec_sub(uptime, tsk->start_time);
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/* rebase elapsed time to usec (should never be negative) */
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ac_etime = timespec_to_ns(&ts);
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do_div(ac_etime, NSEC_PER_USEC);
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stats->ac_etime = ac_etime;
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stats->ac_btime = get_seconds() - ts.tv_sec;
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if (thread_group_leader(tsk)) {
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stats->ac_exitcode = tsk->exit_code;
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if (tsk->flags & PF_FORKNOEXEC)
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stats->ac_flag |= AFORK;
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}
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if (tsk->flags & PF_SUPERPRIV)
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stats->ac_flag |= ASU;
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if (tsk->flags & PF_DUMPCORE)
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stats->ac_flag |= ACORE;
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if (tsk->flags & PF_SIGNALED)
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stats->ac_flag |= AXSIG;
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stats->ac_nice = task_nice(tsk);
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stats->ac_sched = tsk->policy;
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stats->ac_pid = task_pid_nr_ns(tsk, pid_ns);
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rcu_read_lock();
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tcred = __task_cred(tsk);
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stats->ac_uid = from_kuid_munged(user_ns, tcred->uid);
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stats->ac_gid = from_kgid_munged(user_ns, tcred->gid);
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stats->ac_ppid = pid_alive(tsk) ?
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task_tgid_nr_ns(rcu_dereference(tsk->real_parent), pid_ns) : 0;
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rcu_read_unlock();
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stats->ac_utime = cputime_to_usecs(tsk->utime);
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stats->ac_stime = cputime_to_usecs(tsk->stime);
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stats->ac_utimescaled = cputime_to_usecs(tsk->utimescaled);
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stats->ac_stimescaled = cputime_to_usecs(tsk->stimescaled);
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stats->ac_minflt = tsk->min_flt;
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stats->ac_majflt = tsk->maj_flt;
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strncpy(stats->ac_comm, tsk->comm, sizeof(stats->ac_comm));
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}
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#ifdef CONFIG_TASK_XACCT
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#define KB 1024
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#define MB (1024*KB)
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#define KB_MASK (~(KB-1))
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/*
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* fill in extended accounting fields
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*/
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void xacct_add_tsk(struct taskstats *stats, struct task_struct *p)
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{
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struct mm_struct *mm;
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/* convert pages-usec to Mbyte-usec */
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stats->coremem = p->acct_rss_mem1 * PAGE_SIZE / MB;
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stats->virtmem = p->acct_vm_mem1 * PAGE_SIZE / MB;
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mm = get_task_mm(p);
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if (mm) {
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/* adjust to KB unit */
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stats->hiwater_rss = get_mm_hiwater_rss(mm) * PAGE_SIZE / KB;
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stats->hiwater_vm = get_mm_hiwater_vm(mm) * PAGE_SIZE / KB;
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mmput(mm);
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}
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stats->read_char = p->ioac.rchar & KB_MASK;
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stats->write_char = p->ioac.wchar & KB_MASK;
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stats->read_syscalls = p->ioac.syscr & KB_MASK;
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stats->write_syscalls = p->ioac.syscw & KB_MASK;
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#ifdef CONFIG_TASK_IO_ACCOUNTING
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stats->read_bytes = p->ioac.read_bytes & KB_MASK;
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stats->write_bytes = p->ioac.write_bytes & KB_MASK;
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stats->cancelled_write_bytes = p->ioac.cancelled_write_bytes & KB_MASK;
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#else
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stats->read_bytes = 0;
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stats->write_bytes = 0;
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stats->cancelled_write_bytes = 0;
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#endif
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}
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#undef KB
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#undef MB
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/**
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* acct_update_integrals - update mm integral fields in task_struct
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* @tsk: task_struct for accounting
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*/
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void acct_update_integrals(struct task_struct *tsk)
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{
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if (likely(tsk->mm)) {
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cputime_t time, dtime;
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struct timeval value;
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unsigned long flags;
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u64 delta;
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local_irq_save(flags);
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time = tsk->stime + tsk->utime;
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dtime = time - tsk->acct_timexpd;
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jiffies_to_timeval(cputime_to_jiffies(dtime), &value);
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delta = value.tv_sec;
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delta = delta * USEC_PER_SEC + value.tv_usec;
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if (delta == 0)
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goto out;
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tsk->acct_timexpd = time;
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tsk->acct_rss_mem1 += delta * get_mm_rss(tsk->mm);
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tsk->acct_vm_mem1 += delta * tsk->mm->total_vm;
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out:
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local_irq_restore(flags);
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}
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}
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/**
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* acct_clear_integrals - clear the mm integral fields in task_struct
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* @tsk: task_struct whose accounting fields are cleared
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*/
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void acct_clear_integrals(struct task_struct *tsk)
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{
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tsk->acct_timexpd = 0;
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tsk->acct_rss_mem1 = 0;
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tsk->acct_vm_mem1 = 0;
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}
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#endif
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