^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) * taskstats.c - Export per-task statistics to userland
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) Shailabh Nagar, IBM Corp. 2006
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * (C) Balbir Singh, IBM Corp. 2006
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/taskstats_kern.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/tsacct_kern.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/delayacct.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/cpumask.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/percpu.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/cgroupstats.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/cgroup.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/file.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/pid_namespace.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <net/genetlink.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/atomic.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <linux/sched/cputime.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) * Maximum length of a cpumask that can be specified in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) * the TASKSTATS_CMD_ATTR_REGISTER/DEREGISTER_CPUMASK attribute
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #define TASKSTATS_CPUMASK_MAXLEN (100+6*NR_CPUS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) static DEFINE_PER_CPU(__u32, taskstats_seqnum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) static int family_registered;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) struct kmem_cache *taskstats_cache;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) static struct genl_family family;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) static const struct nla_policy taskstats_cmd_get_policy[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) [TASKSTATS_CMD_ATTR_PID] = { .type = NLA_U32 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) [TASKSTATS_CMD_ATTR_TGID] = { .type = NLA_U32 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) [TASKSTATS_CMD_ATTR_REGISTER_CPUMASK] = { .type = NLA_STRING },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) [TASKSTATS_CMD_ATTR_DEREGISTER_CPUMASK] = { .type = NLA_STRING },};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) static const struct nla_policy cgroupstats_cmd_get_policy[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) [CGROUPSTATS_CMD_ATTR_FD] = { .type = NLA_U32 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) struct listener {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) struct list_head list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) pid_t pid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) char valid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) struct listener_list {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) struct rw_semaphore sem;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) struct list_head list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) static DEFINE_PER_CPU(struct listener_list, listener_array);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) enum actions {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) REGISTER,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) DEREGISTER,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) CPU_DONT_CARE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) static int prepare_reply(struct genl_info *info, u8 cmd, struct sk_buff **skbp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) size_t size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) struct sk_buff *skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) void *reply;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) * If new attributes are added, please revisit this allocation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) skb = genlmsg_new(size, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) if (!skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) if (!info) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) int seq = this_cpu_inc_return(taskstats_seqnum) - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) reply = genlmsg_put(skb, 0, seq, &family, 0, cmd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) reply = genlmsg_put_reply(skb, info, &family, 0, cmd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) if (reply == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) nlmsg_free(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) *skbp = skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) * Send taskstats data in @skb to listener with nl_pid @pid
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) static int send_reply(struct sk_buff *skb, struct genl_info *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) struct genlmsghdr *genlhdr = nlmsg_data(nlmsg_hdr(skb));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) void *reply = genlmsg_data(genlhdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) genlmsg_end(skb, reply);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) return genlmsg_reply(skb, info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) * Send taskstats data in @skb to listeners registered for @cpu's exit data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) static void send_cpu_listeners(struct sk_buff *skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) struct listener_list *listeners)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) struct genlmsghdr *genlhdr = nlmsg_data(nlmsg_hdr(skb));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) struct listener *s, *tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) struct sk_buff *skb_next, *skb_cur = skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) void *reply = genlmsg_data(genlhdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) int rc, delcount = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) genlmsg_end(skb, reply);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) rc = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) down_read(&listeners->sem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) list_for_each_entry(s, &listeners->list, list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) skb_next = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) if (!list_is_last(&s->list, &listeners->list)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) skb_next = skb_clone(skb_cur, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) if (!skb_next)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) rc = genlmsg_unicast(&init_net, skb_cur, s->pid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) if (rc == -ECONNREFUSED) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) s->valid = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) delcount++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) skb_cur = skb_next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) up_read(&listeners->sem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) if (skb_cur)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) nlmsg_free(skb_cur);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) if (!delcount)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) /* Delete invalidated entries */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) down_write(&listeners->sem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) list_for_each_entry_safe(s, tmp, &listeners->list, list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) if (!s->valid) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) list_del(&s->list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) kfree(s);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) up_write(&listeners->sem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) static void fill_stats(struct user_namespace *user_ns,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) struct pid_namespace *pid_ns,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) struct task_struct *tsk, struct taskstats *stats)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) memset(stats, 0, sizeof(*stats));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) * Each accounting subsystem adds calls to its functions to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) * fill in relevant parts of struct taskstsats as follows
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) * per-task-foo(stats, tsk);
^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) delayacct_add_tsk(stats, tsk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) /* fill in basic acct fields */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) stats->version = TASKSTATS_VERSION;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) stats->nvcsw = tsk->nvcsw;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) stats->nivcsw = tsk->nivcsw;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) bacct_add_tsk(user_ns, pid_ns, stats, tsk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) /* fill in extended acct fields */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) xacct_add_tsk(stats, tsk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) static int fill_stats_for_pid(pid_t pid, struct taskstats *stats)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) struct task_struct *tsk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) tsk = find_get_task_by_vpid(pid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) if (!tsk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) return -ESRCH;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) fill_stats(current_user_ns(), task_active_pid_ns(current), tsk, stats);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) put_task_struct(tsk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) static int fill_stats_for_tgid(pid_t tgid, struct taskstats *stats)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) struct task_struct *tsk, *first;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) int rc = -ESRCH;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) u64 delta, utime, stime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) u64 start_time;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) * Add additional stats from live tasks except zombie thread group
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) * leaders who are already counted with the dead tasks
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) first = find_task_by_vpid(tgid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) if (!first || !lock_task_sighand(first, &flags))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) if (first->signal->stats)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) memcpy(stats, first->signal->stats, sizeof(*stats));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) memset(stats, 0, sizeof(*stats));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) tsk = first;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) start_time = ktime_get_ns();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) if (tsk->exit_state)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) * Accounting subsystem can call its functions here to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) * fill in relevant parts of struct taskstsats as follows
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) * per-task-foo(stats, tsk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) delayacct_add_tsk(stats, tsk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) /* calculate task elapsed time in nsec */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) delta = start_time - tsk->start_time;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) /* Convert to micro seconds */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) do_div(delta, NSEC_PER_USEC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) stats->ac_etime += delta;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) task_cputime(tsk, &utime, &stime);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) stats->ac_utime += div_u64(utime, NSEC_PER_USEC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) stats->ac_stime += div_u64(stime, NSEC_PER_USEC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) stats->nvcsw += tsk->nvcsw;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) stats->nivcsw += tsk->nivcsw;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) } while_each_thread(first, tsk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) unlock_task_sighand(first, &flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) rc = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) stats->version = TASKSTATS_VERSION;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) * Accounting subsystems can also add calls here to modify
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) * fields of taskstats.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) static void fill_tgid_exit(struct task_struct *tsk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) spin_lock_irqsave(&tsk->sighand->siglock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) if (!tsk->signal->stats)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) goto ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) * Each accounting subsystem calls its functions here to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) * accumalate its per-task stats for tsk, into the per-tgid structure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) * per-task-foo(tsk->signal->stats, tsk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) delayacct_add_tsk(tsk->signal->stats, tsk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) ret:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) spin_unlock_irqrestore(&tsk->sighand->siglock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) static int add_del_listener(pid_t pid, const struct cpumask *mask, int isadd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) struct listener_list *listeners;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) struct listener *s, *tmp, *s2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) unsigned int cpu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) if (!cpumask_subset(mask, cpu_possible_mask))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) if (current_user_ns() != &init_user_ns)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) if (task_active_pid_ns(current) != &init_pid_ns)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) if (isadd == REGISTER) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) for_each_cpu(cpu, mask) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) s = kmalloc_node(sizeof(struct listener),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) GFP_KERNEL, cpu_to_node(cpu));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) if (!s) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) goto cleanup;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) s->pid = pid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) s->valid = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) listeners = &per_cpu(listener_array, cpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) down_write(&listeners->sem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) list_for_each_entry(s2, &listeners->list, list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) if (s2->pid == pid && s2->valid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) goto exists;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) list_add(&s->list, &listeners->list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) s = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) exists:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) up_write(&listeners->sem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) kfree(s); /* nop if NULL */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) /* Deregister or cleanup */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) cleanup:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) for_each_cpu(cpu, mask) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) listeners = &per_cpu(listener_array, cpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) down_write(&listeners->sem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) list_for_each_entry_safe(s, tmp, &listeners->list, list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) if (s->pid == pid) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) list_del(&s->list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) kfree(s);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) up_write(&listeners->sem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) static int parse(struct nlattr *na, struct cpumask *mask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) char *data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) int len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) if (na == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) len = nla_len(na);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) if (len > TASKSTATS_CPUMASK_MAXLEN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) return -E2BIG;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) if (len < 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) data = kmalloc(len, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) if (!data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) nla_strlcpy(data, na, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) ret = cpulist_parse(data, mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) kfree(data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) static struct taskstats *mk_reply(struct sk_buff *skb, int type, u32 pid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) struct nlattr *na, *ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) int aggr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) aggr = (type == TASKSTATS_TYPE_PID)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) ? TASKSTATS_TYPE_AGGR_PID
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) : TASKSTATS_TYPE_AGGR_TGID;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) na = nla_nest_start_noflag(skb, aggr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) if (!na)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) if (nla_put(skb, type, sizeof(pid), &pid) < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) nla_nest_cancel(skb, na);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) ret = nla_reserve_64bit(skb, TASKSTATS_TYPE_STATS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) sizeof(struct taskstats), TASKSTATS_TYPE_NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) if (!ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) nla_nest_cancel(skb, na);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) nla_nest_end(skb, na);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) return nla_data(ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) err:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) static int cgroupstats_user_cmd(struct sk_buff *skb, struct genl_info *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) int rc = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) struct sk_buff *rep_skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) struct cgroupstats *stats;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) struct nlattr *na;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) size_t size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) u32 fd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) struct fd f;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) na = info->attrs[CGROUPSTATS_CMD_ATTR_FD];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) if (!na)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) fd = nla_get_u32(info->attrs[CGROUPSTATS_CMD_ATTR_FD]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) f = fdget(fd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) if (!f.file)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) size = nla_total_size(sizeof(struct cgroupstats));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) rc = prepare_reply(info, CGROUPSTATS_CMD_NEW, &rep_skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) if (rc < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) na = nla_reserve(rep_skb, CGROUPSTATS_TYPE_CGROUP_STATS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) sizeof(struct cgroupstats));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) if (na == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) nlmsg_free(rep_skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) rc = -EMSGSIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) stats = nla_data(na);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) memset(stats, 0, sizeof(*stats));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) rc = cgroupstats_build(stats, f.file->f_path.dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) if (rc < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) nlmsg_free(rep_skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) rc = send_reply(rep_skb, info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) err:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) fdput(f);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) static int cmd_attr_register_cpumask(struct genl_info *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) cpumask_var_t mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) if (!alloc_cpumask_var(&mask, GFP_KERNEL))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) rc = parse(info->attrs[TASKSTATS_CMD_ATTR_REGISTER_CPUMASK], mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) if (rc < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) rc = add_del_listener(info->snd_portid, mask, REGISTER);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) free_cpumask_var(mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) static int cmd_attr_deregister_cpumask(struct genl_info *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) cpumask_var_t mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) if (!alloc_cpumask_var(&mask, GFP_KERNEL))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) rc = parse(info->attrs[TASKSTATS_CMD_ATTR_DEREGISTER_CPUMASK], mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) if (rc < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) rc = add_del_listener(info->snd_portid, mask, DEREGISTER);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) free_cpumask_var(mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) static size_t taskstats_packet_size(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) size_t size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) size = nla_total_size(sizeof(u32)) +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) nla_total_size_64bit(sizeof(struct taskstats)) +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) nla_total_size(0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) return size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) static int cmd_attr_pid(struct genl_info *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) struct taskstats *stats;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) struct sk_buff *rep_skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) size_t size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) u32 pid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) size = taskstats_packet_size();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) rc = prepare_reply(info, TASKSTATS_CMD_NEW, &rep_skb, size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) if (rc < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) rc = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) pid = nla_get_u32(info->attrs[TASKSTATS_CMD_ATTR_PID]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) stats = mk_reply(rep_skb, TASKSTATS_TYPE_PID, pid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) if (!stats)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) rc = fill_stats_for_pid(pid, stats);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) if (rc < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) return send_reply(rep_skb, info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) err:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) nlmsg_free(rep_skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) static int cmd_attr_tgid(struct genl_info *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) struct taskstats *stats;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) struct sk_buff *rep_skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) size_t size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) u32 tgid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) size = taskstats_packet_size();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) rc = prepare_reply(info, TASKSTATS_CMD_NEW, &rep_skb, size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) if (rc < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) rc = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) tgid = nla_get_u32(info->attrs[TASKSTATS_CMD_ATTR_TGID]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) stats = mk_reply(rep_skb, TASKSTATS_TYPE_TGID, tgid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) if (!stats)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) rc = fill_stats_for_tgid(tgid, stats);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) if (rc < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) return send_reply(rep_skb, info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) err:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) nlmsg_free(rep_skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) static int taskstats_user_cmd(struct sk_buff *skb, struct genl_info *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) if (info->attrs[TASKSTATS_CMD_ATTR_REGISTER_CPUMASK])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) return cmd_attr_register_cpumask(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) else if (info->attrs[TASKSTATS_CMD_ATTR_DEREGISTER_CPUMASK])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) return cmd_attr_deregister_cpumask(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) else if (info->attrs[TASKSTATS_CMD_ATTR_PID])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) return cmd_attr_pid(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) else if (info->attrs[TASKSTATS_CMD_ATTR_TGID])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) return cmd_attr_tgid(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) static struct taskstats *taskstats_tgid_alloc(struct task_struct *tsk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) struct signal_struct *sig = tsk->signal;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) struct taskstats *stats_new, *stats;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) /* Pairs with smp_store_release() below. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) stats = smp_load_acquire(&sig->stats);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) if (stats || thread_group_empty(tsk))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) return stats;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) /* No problem if kmem_cache_zalloc() fails */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) stats_new = kmem_cache_zalloc(taskstats_cache, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) spin_lock_irq(&tsk->sighand->siglock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) stats = sig->stats;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) if (!stats) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) * Pairs with smp_store_release() above and order the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) * kmem_cache_zalloc().
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) smp_store_release(&sig->stats, stats_new);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) stats = stats_new;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) stats_new = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) spin_unlock_irq(&tsk->sighand->siglock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) if (stats_new)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) kmem_cache_free(taskstats_cache, stats_new);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) return stats;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) /* Send pid data out on exit */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) void taskstats_exit(struct task_struct *tsk, int group_dead)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) struct listener_list *listeners;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) struct taskstats *stats;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) struct sk_buff *rep_skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) size_t size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) int is_thread_group;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) if (!family_registered)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) * Size includes space for nested attributes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) size = taskstats_packet_size();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) is_thread_group = !!taskstats_tgid_alloc(tsk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) if (is_thread_group) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) /* PID + STATS + TGID + STATS */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) size = 2 * size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) /* fill the tsk->signal->stats structure */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) fill_tgid_exit(tsk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) listeners = raw_cpu_ptr(&listener_array);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) if (list_empty(&listeners->list))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) rc = prepare_reply(NULL, TASKSTATS_CMD_NEW, &rep_skb, size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) if (rc < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) stats = mk_reply(rep_skb, TASKSTATS_TYPE_PID,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) task_pid_nr_ns(tsk, &init_pid_ns));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) if (!stats)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) fill_stats(&init_user_ns, &init_pid_ns, tsk, stats);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) * Doesn't matter if tsk is the leader or the last group member leaving
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) if (!is_thread_group || !group_dead)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) goto send;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) stats = mk_reply(rep_skb, TASKSTATS_TYPE_TGID,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) task_tgid_nr_ns(tsk, &init_pid_ns));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) if (!stats)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) memcpy(stats, tsk->signal->stats, sizeof(*stats));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) send:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) send_cpu_listeners(rep_skb, listeners);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) err:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) nlmsg_free(rep_skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) static const struct genl_ops taskstats_ops[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) .cmd = TASKSTATS_CMD_GET,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) .doit = taskstats_user_cmd,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) .policy = taskstats_cmd_get_policy,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) .maxattr = ARRAY_SIZE(taskstats_cmd_get_policy) - 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) .flags = GENL_ADMIN_PERM,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) .cmd = CGROUPSTATS_CMD_GET,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) .doit = cgroupstats_user_cmd,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) .policy = cgroupstats_cmd_get_policy,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) .maxattr = ARRAY_SIZE(cgroupstats_cmd_get_policy) - 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) static struct genl_family family __ro_after_init = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) .name = TASKSTATS_GENL_NAME,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) .version = TASKSTATS_GENL_VERSION,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) .module = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) .ops = taskstats_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) .n_ops = ARRAY_SIZE(taskstats_ops),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) /* Needed early in initialization */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) void __init taskstats_init_early(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) unsigned int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) taskstats_cache = KMEM_CACHE(taskstats, SLAB_PANIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) for_each_possible_cpu(i) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) INIT_LIST_HEAD(&(per_cpu(listener_array, i).list));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) init_rwsem(&(per_cpu(listener_array, i).sem));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681) static int __init taskstats_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) rc = genl_register_family(&family);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) family_registered = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690) pr_info("registered taskstats version %d\n", TASKSTATS_GENL_VERSION);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) * late initcall ensures initialization of statistics collection
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696) * mechanisms precedes initialization of the taskstats interface
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698) late_initcall(taskstats_init);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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