^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * tsacct.c - System accounting over taskstats interface
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) Jay Lan, <jlan@sgi.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/sched/signal.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/sched/mm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/sched/cputime.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/tsacct_kern.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/acct.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/jiffies.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/mm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) * fill in basic accounting fields
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) void bacct_add_tsk(struct user_namespace *user_ns,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) struct pid_namespace *pid_ns,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) struct taskstats *stats, struct task_struct *tsk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) const struct cred *tcred;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) u64 utime, stime, utimescaled, stimescaled;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) u64 delta;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) time64_t btime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) BUILD_BUG_ON(TS_COMM_LEN < TASK_COMM_LEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) /* calculate task elapsed time in nsec */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) delta = ktime_get_ns() - tsk->start_time;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) /* Convert to micro seconds */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) do_div(delta, NSEC_PER_USEC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) stats->ac_etime = delta;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) /* Convert to seconds for btime (note y2106 limit) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) btime = ktime_get_real_seconds() - div_u64(delta, USEC_PER_SEC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) stats->ac_btime = clamp_t(time64_t, btime, 0, U32_MAX);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) stats->ac_btime64 = btime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) if (tsk->flags & PF_EXITING)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) stats->ac_exitcode = tsk->exit_code;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) if (thread_group_leader(tsk) && (tsk->flags & PF_FORKNOEXEC))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) stats->ac_flag |= AFORK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) if (tsk->flags & PF_SUPERPRIV)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) stats->ac_flag |= ASU;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) if (tsk->flags & PF_DUMPCORE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) stats->ac_flag |= ACORE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) if (tsk->flags & PF_SIGNALED)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) stats->ac_flag |= AXSIG;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) stats->ac_nice = task_nice(tsk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) stats->ac_sched = tsk->policy;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) stats->ac_pid = task_pid_nr_ns(tsk, pid_ns);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) tcred = __task_cred(tsk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) stats->ac_uid = from_kuid_munged(user_ns, tcred->uid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) stats->ac_gid = from_kgid_munged(user_ns, tcred->gid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) stats->ac_ppid = pid_alive(tsk) ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) task_tgid_nr_ns(rcu_dereference(tsk->real_parent), pid_ns) : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) task_cputime(tsk, &utime, &stime);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) stats->ac_utime = div_u64(utime, NSEC_PER_USEC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) stats->ac_stime = div_u64(stime, NSEC_PER_USEC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) task_cputime_scaled(tsk, &utimescaled, &stimescaled);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) stats->ac_utimescaled = div_u64(utimescaled, NSEC_PER_USEC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) stats->ac_stimescaled = div_u64(stimescaled, NSEC_PER_USEC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) stats->ac_minflt = tsk->min_flt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) stats->ac_majflt = tsk->maj_flt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) strncpy(stats->ac_comm, tsk->comm, sizeof(stats->ac_comm));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) #ifdef CONFIG_TASK_XACCT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) #define KB 1024
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) #define MB (1024*KB)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) #define KB_MASK (~(KB-1))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) * fill in extended accounting fields
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) void xacct_add_tsk(struct taskstats *stats, struct task_struct *p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) struct mm_struct *mm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) /* convert pages-nsec/1024 to Mbyte-usec, see __acct_update_integrals */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) stats->coremem = p->acct_rss_mem1 * PAGE_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) do_div(stats->coremem, 1000 * KB);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) stats->virtmem = p->acct_vm_mem1 * PAGE_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) do_div(stats->virtmem, 1000 * KB);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) mm = get_task_mm(p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) if (mm) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) /* adjust to KB unit */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) stats->hiwater_rss = get_mm_hiwater_rss(mm) * PAGE_SIZE / KB;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) stats->hiwater_vm = get_mm_hiwater_vm(mm) * PAGE_SIZE / KB;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) mmput(mm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) stats->read_char = p->ioac.rchar & KB_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) stats->write_char = p->ioac.wchar & KB_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) stats->read_syscalls = p->ioac.syscr & KB_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) stats->write_syscalls = p->ioac.syscw & KB_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) #ifdef CONFIG_TASK_IO_ACCOUNTING
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) stats->read_bytes = p->ioac.read_bytes & KB_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) stats->write_bytes = p->ioac.write_bytes & KB_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) stats->cancelled_write_bytes = p->ioac.cancelled_write_bytes & KB_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) stats->read_bytes = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) stats->write_bytes = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) stats->cancelled_write_bytes = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) #undef KB
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) #undef MB
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) static void __acct_update_integrals(struct task_struct *tsk,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) u64 utime, u64 stime)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) u64 time, delta;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) if (!likely(tsk->mm))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) time = stime + utime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) delta = time - tsk->acct_timexpd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) if (delta < TICK_NSEC)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) tsk->acct_timexpd = time;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) * Divide by 1024 to avoid overflow, and to avoid division.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) * The final unit reported to userspace is Mbyte-usecs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) * the rest of the math is done in xacct_add_tsk.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) tsk->acct_rss_mem1 += delta * get_mm_rss(tsk->mm) >> 10;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) tsk->acct_vm_mem1 += delta * tsk->mm->total_vm >> 10;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) * acct_update_integrals - update mm integral fields in task_struct
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) * @tsk: task_struct for accounting
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) void acct_update_integrals(struct task_struct *tsk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) u64 utime, stime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) local_irq_save(flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) task_cputime(tsk, &utime, &stime);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) __acct_update_integrals(tsk, utime, stime);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) local_irq_restore(flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) * acct_account_cputime - update mm integral after cputime update
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) * @tsk: task_struct for accounting
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) void acct_account_cputime(struct task_struct *tsk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) __acct_update_integrals(tsk, tsk->utime, tsk->stime);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) * acct_clear_integrals - clear the mm integral fields in task_struct
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) * @tsk: task_struct whose accounting fields are cleared
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) void acct_clear_integrals(struct task_struct *tsk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) tsk->acct_timexpd = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) tsk->acct_rss_mem1 = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) tsk->acct_vm_mem1 = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) #endif
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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