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Commit | Line | Data |
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f3cef7a9 JL |
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> | |
3f07c014 | 20 | #include <linux/sched/signal.h> |
6e84f315 | 21 | #include <linux/sched/mm.h> |
f3cef7a9 JL |
22 | #include <linux/tsacct_kern.h> |
23 | #include <linux/acct.h> | |
db5fed26 | 24 | #include <linux/jiffies.h> |
d559db08 | 25 | #include <linux/mm.h> |
f3cef7a9 | 26 | |
f3cef7a9 JL |
27 | /* |
28 | * fill in basic accounting fields | |
29 | */ | |
4bd6e32a EB |
30 | void bacct_add_tsk(struct user_namespace *user_ns, |
31 | struct pid_namespace *pid_ns, | |
32 | struct taskstats *stats, struct task_struct *tsk) | |
f3cef7a9 | 33 | { |
c69e8d9c | 34 | const struct cred *tcred; |
605dc2b3 | 35 | u64 utime, stime, utimescaled, stimescaled; |
ccbf62d8 | 36 | u64 delta; |
f3cef7a9 JL |
37 | |
38 | BUILD_BUG_ON(TS_COMM_LEN < TASK_COMM_LEN); | |
39 | ||
ccbf62d8 TG |
40 | /* calculate task elapsed time in nsec */ |
41 | delta = ktime_get_ns() - tsk->start_time; | |
42 | /* Convert to micro seconds */ | |
43 | do_div(delta, NSEC_PER_USEC); | |
44 | stats->ac_etime = delta; | |
45 | /* Convert to seconds for btime */ | |
46 | do_div(delta, USEC_PER_SEC); | |
47 | stats->ac_btime = get_seconds() - delta; | |
f3cef7a9 JL |
48 | if (thread_group_leader(tsk)) { |
49 | stats->ac_exitcode = tsk->exit_code; | |
50 | if (tsk->flags & PF_FORKNOEXEC) | |
51 | stats->ac_flag |= AFORK; | |
52 | } | |
53 | if (tsk->flags & PF_SUPERPRIV) | |
54 | stats->ac_flag |= ASU; | |
55 | if (tsk->flags & PF_DUMPCORE) | |
56 | stats->ac_flag |= ACORE; | |
57 | if (tsk->flags & PF_SIGNALED) | |
58 | stats->ac_flag |= AXSIG; | |
59 | stats->ac_nice = task_nice(tsk); | |
60 | stats->ac_sched = tsk->policy; | |
4bd6e32a | 61 | stats->ac_pid = task_pid_nr_ns(tsk, pid_ns); |
05d5bcd6 | 62 | rcu_read_lock(); |
c69e8d9c | 63 | tcred = __task_cred(tsk); |
4bd6e32a EB |
64 | stats->ac_uid = from_kuid_munged(user_ns, tcred->uid); |
65 | stats->ac_gid = from_kgid_munged(user_ns, tcred->gid); | |
05d5bcd6 | 66 | stats->ac_ppid = pid_alive(tsk) ? |
4bd6e32a | 67 | task_tgid_nr_ns(rcu_dereference(tsk->real_parent), pid_ns) : 0; |
05d5bcd6 | 68 | rcu_read_unlock(); |
6fac4829 | 69 | |
605dc2b3 FW |
70 | task_cputime(tsk, &utime, &stime); |
71 | stats->ac_utime = div_u64(utime, NSEC_PER_USEC); | |
72 | stats->ac_stime = div_u64(stime, NSEC_PER_USEC); | |
6fac4829 | 73 | |
605dc2b3 FW |
74 | task_cputime_scaled(tsk, &utimescaled, &stimescaled); |
75 | stats->ac_utimescaled = div_u64(utimescaled, NSEC_PER_USEC); | |
76 | stats->ac_stimescaled = div_u64(stimescaled, NSEC_PER_USEC); | |
6fac4829 | 77 | |
f3cef7a9 JL |
78 | stats->ac_minflt = tsk->min_flt; |
79 | stats->ac_majflt = tsk->maj_flt; | |
f3cef7a9 JL |
80 | |
81 | strncpy(stats->ac_comm, tsk->comm, sizeof(stats->ac_comm)); | |
82 | } | |
83 | ||
9acc1853 JL |
84 | |
85 | #ifdef CONFIG_TASK_XACCT | |
db5fed26 JL |
86 | |
87 | #define KB 1024 | |
88 | #define MB (1024*KB) | |
58c3c3aa | 89 | #define KB_MASK (~(KB-1)) |
9acc1853 JL |
90 | /* |
91 | * fill in extended accounting fields | |
92 | */ | |
93 | void xacct_add_tsk(struct taskstats *stats, struct task_struct *p) | |
94 | { | |
f0ec1aaf ON |
95 | struct mm_struct *mm; |
96 | ||
382c2fe9 RR |
97 | /* convert pages-nsec/1024 to Mbyte-usec, see __acct_update_integrals */ |
98 | stats->coremem = p->acct_rss_mem1 * PAGE_SIZE; | |
99 | do_div(stats->coremem, 1000 * KB); | |
100 | stats->virtmem = p->acct_vm_mem1 * PAGE_SIZE; | |
101 | do_div(stats->virtmem, 1000 * KB); | |
f0ec1aaf ON |
102 | mm = get_task_mm(p); |
103 | if (mm) { | |
db5fed26 | 104 | /* adjust to KB unit */ |
901608d9 ON |
105 | stats->hiwater_rss = get_mm_hiwater_rss(mm) * PAGE_SIZE / KB; |
106 | stats->hiwater_vm = get_mm_hiwater_vm(mm) * PAGE_SIZE / KB; | |
f0ec1aaf | 107 | mmput(mm); |
9acc1853 | 108 | } |
58c3c3aa LT |
109 | stats->read_char = p->ioac.rchar & KB_MASK; |
110 | stats->write_char = p->ioac.wchar & KB_MASK; | |
111 | stats->read_syscalls = p->ioac.syscr & KB_MASK; | |
112 | stats->write_syscalls = p->ioac.syscw & KB_MASK; | |
4a7864ca | 113 | #ifdef CONFIG_TASK_IO_ACCOUNTING |
58c3c3aa LT |
114 | stats->read_bytes = p->ioac.read_bytes & KB_MASK; |
115 | stats->write_bytes = p->ioac.write_bytes & KB_MASK; | |
116 | stats->cancelled_write_bytes = p->ioac.cancelled_write_bytes & KB_MASK; | |
4a7864ca AM |
117 | #else |
118 | stats->read_bytes = 0; | |
119 | stats->write_bytes = 0; | |
120 | stats->cancelled_write_bytes = 0; | |
121 | #endif | |
9acc1853 | 122 | } |
db5fed26 JL |
123 | #undef KB |
124 | #undef MB | |
8f0ab514 | 125 | |
6fac4829 | 126 | static void __acct_update_integrals(struct task_struct *tsk, |
605dc2b3 | 127 | u64 utime, u64 stime) |
8f0ab514 | 128 | { |
605dc2b3 | 129 | u64 time, delta; |
b2add86e RR |
130 | |
131 | if (!likely(tsk->mm)) | |
132 | return; | |
133 | ||
b2add86e | 134 | time = stime + utime; |
605dc2b3 | 135 | delta = time - tsk->acct_timexpd; |
b2add86e RR |
136 | |
137 | if (delta < TICK_NSEC) | |
9344c92c | 138 | return; |
b2add86e RR |
139 | |
140 | tsk->acct_timexpd = time; | |
141 | /* | |
142 | * Divide by 1024 to avoid overflow, and to avoid division. | |
143 | * The final unit reported to userspace is Mbyte-usecs, | |
144 | * the rest of the math is done in xacct_add_tsk. | |
145 | */ | |
146 | tsk->acct_rss_mem1 += delta * get_mm_rss(tsk->mm) >> 10; | |
147 | tsk->acct_vm_mem1 += delta * tsk->mm->total_vm >> 10; | |
8f0ab514 JL |
148 | } |
149 | ||
6fac4829 FW |
150 | /** |
151 | * acct_update_integrals - update mm integral fields in task_struct | |
152 | * @tsk: task_struct for accounting | |
153 | */ | |
154 | void acct_update_integrals(struct task_struct *tsk) | |
155 | { | |
605dc2b3 | 156 | u64 utime, stime; |
9344c92c | 157 | unsigned long flags; |
6fac4829 | 158 | |
9344c92c | 159 | local_irq_save(flags); |
605dc2b3 | 160 | task_cputime(tsk, &utime, &stime); |
6fac4829 | 161 | __acct_update_integrals(tsk, utime, stime); |
9344c92c | 162 | local_irq_restore(flags); |
6fac4829 FW |
163 | } |
164 | ||
165 | /** | |
166 | * acct_account_cputime - update mm integral after cputime update | |
167 | * @tsk: task_struct for accounting | |
168 | */ | |
169 | void acct_account_cputime(struct task_struct *tsk) | |
170 | { | |
171 | __acct_update_integrals(tsk, tsk->utime, tsk->stime); | |
172 | } | |
173 | ||
8f0ab514 JL |
174 | /** |
175 | * acct_clear_integrals - clear the mm integral fields in task_struct | |
176 | * @tsk: task_struct whose accounting fields are cleared | |
177 | */ | |
178 | void acct_clear_integrals(struct task_struct *tsk) | |
179 | { | |
49b5cf34 | 180 | tsk->acct_timexpd = 0; |
8f0ab514 JL |
181 | tsk->acct_rss_mem1 = 0; |
182 | tsk->acct_vm_mem1 = 0; | |
183 | } | |
9acc1853 | 184 | #endif |