^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /* drivers/misc/uid_sys_stats.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Copyright (C) 2014 - 2015 Google, Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * This software is licensed under the terms of the GNU General Public
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * License version 2, as published by the Free Software Foundation, and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * may be copied, distributed, and modified under those terms.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * This program is distributed in the hope that it will be useful,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * but WITHOUT ANY WARRANTY; without even the implied warranty of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) * GNU General Public License for more details.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/atomic.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/err.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/hashtable.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/list.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/mm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <linux/proc_fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <linux/profile.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include <linux/rtmutex.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include <linux/sched/cputime.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #include <linux/seq_file.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #include <linux/uaccess.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #define UID_HASH_BITS 10
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) DECLARE_HASHTABLE(hash_table, UID_HASH_BITS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) static DEFINE_RT_MUTEX(uid_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) static struct proc_dir_entry *cpu_parent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) static struct proc_dir_entry *io_parent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) static struct proc_dir_entry *proc_parent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) struct io_stats {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) u64 read_bytes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) u64 write_bytes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) u64 rchar;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) u64 wchar;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) u64 fsync;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) #define UID_STATE_FOREGROUND 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) #define UID_STATE_BACKGROUND 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) #define UID_STATE_BUCKET_SIZE 2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) #define UID_STATE_TOTAL_CURR 2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) #define UID_STATE_TOTAL_LAST 3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) #define UID_STATE_DEAD_TASKS 4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) #define UID_STATE_SIZE 5
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) #define MAX_TASK_COMM_LEN 256
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) struct task_entry {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) char comm[MAX_TASK_COMM_LEN];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) pid_t pid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) struct io_stats io[UID_STATE_SIZE];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) struct hlist_node hash;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) struct uid_entry {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) uid_t uid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) u64 utime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) u64 stime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) u64 active_utime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) u64 active_stime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) int state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) struct io_stats io[UID_STATE_SIZE];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) struct hlist_node hash;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) #ifdef CONFIG_UID_SYS_STATS_DEBUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) DECLARE_HASHTABLE(task_entries, UID_HASH_BITS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) static u64 compute_write_bytes(struct task_struct *task)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) if (task->ioac.write_bytes <= task->ioac.cancelled_write_bytes)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) return task->ioac.write_bytes - task->ioac.cancelled_write_bytes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) static void compute_io_bucket_stats(struct io_stats *io_bucket,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) struct io_stats *io_curr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) struct io_stats *io_last,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) struct io_stats *io_dead)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) /* tasks could switch to another uid group, but its io_last in the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) * previous uid group could still be positive.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) * therefore before each update, do an overflow check first
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) int64_t delta;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) delta = io_curr->read_bytes + io_dead->read_bytes -
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) io_last->read_bytes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) io_bucket->read_bytes += delta > 0 ? delta : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) delta = io_curr->write_bytes + io_dead->write_bytes -
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) io_last->write_bytes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) io_bucket->write_bytes += delta > 0 ? delta : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) delta = io_curr->rchar + io_dead->rchar - io_last->rchar;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) io_bucket->rchar += delta > 0 ? delta : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) delta = io_curr->wchar + io_dead->wchar - io_last->wchar;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) io_bucket->wchar += delta > 0 ? delta : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) delta = io_curr->fsync + io_dead->fsync - io_last->fsync;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) io_bucket->fsync += delta > 0 ? delta : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) io_last->read_bytes = io_curr->read_bytes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) io_last->write_bytes = io_curr->write_bytes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) io_last->rchar = io_curr->rchar;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) io_last->wchar = io_curr->wchar;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) io_last->fsync = io_curr->fsync;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) memset(io_dead, 0, sizeof(struct io_stats));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) #ifdef CONFIG_UID_SYS_STATS_DEBUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) static void get_full_task_comm(struct task_entry *task_entry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) struct task_struct *task)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) int i = 0, offset = 0, len = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) /* save one byte for terminating null character */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) int unused_len = MAX_TASK_COMM_LEN - TASK_COMM_LEN - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) char buf[MAX_TASK_COMM_LEN - TASK_COMM_LEN - 1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) struct mm_struct *mm = task->mm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) /* fill the first TASK_COMM_LEN bytes with thread name */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) __get_task_comm(task_entry->comm, TASK_COMM_LEN, task);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) i = strlen(task_entry->comm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) while (i < TASK_COMM_LEN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) task_entry->comm[i++] = ' ';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) /* next the executable file name */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) if (mm) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) mmap_write_lock(mm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) if (mm->exe_file) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) char *pathname = d_path(&mm->exe_file->f_path, buf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) unused_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) if (!IS_ERR(pathname)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) len = strlcpy(task_entry->comm + i, pathname,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) unused_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) i += len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) task_entry->comm[i++] = ' ';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) unused_len--;
^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) mmap_write_unlock(mm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) unused_len -= len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) /* fill the rest with command line argument
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) * replace each null or new line character
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) * between args in argv with whitespace */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) len = get_cmdline(task, buf, unused_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) while (offset < len) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) if (buf[offset] != '\0' && buf[offset] != '\n')
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) task_entry->comm[i++] = buf[offset];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) task_entry->comm[i++] = ' ';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) offset++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) /* get rid of trailing whitespaces in case when arg is memset to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) * zero before being reset in userspace
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) while (task_entry->comm[i-1] == ' ')
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) i--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) task_entry->comm[i] = '\0';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) static struct task_entry *find_task_entry(struct uid_entry *uid_entry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) struct task_struct *task)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) struct task_entry *task_entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) hash_for_each_possible(uid_entry->task_entries, task_entry, hash,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) task->pid) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) if (task->pid == task_entry->pid) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) /* if thread name changed, update the entire command */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) int len = strnchr(task_entry->comm, ' ', TASK_COMM_LEN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) - task_entry->comm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) if (strncmp(task_entry->comm, task->comm, len))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) get_full_task_comm(task_entry, task);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) return task_entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) static struct task_entry *find_or_register_task(struct uid_entry *uid_entry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) struct task_struct *task)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) struct task_entry *task_entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) pid_t pid = task->pid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) task_entry = find_task_entry(uid_entry, task);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) if (task_entry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) return task_entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) task_entry = kzalloc(sizeof(struct task_entry), GFP_ATOMIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) if (!task_entry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) get_full_task_comm(task_entry, task);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) task_entry->pid = pid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) hash_add(uid_entry->task_entries, &task_entry->hash, (unsigned int)pid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) return task_entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) static void remove_uid_tasks(struct uid_entry *uid_entry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) struct task_entry *task_entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) unsigned long bkt_task;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) struct hlist_node *tmp_task;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) hash_for_each_safe(uid_entry->task_entries, bkt_task,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) tmp_task, task_entry, hash) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) hash_del(&task_entry->hash);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) kfree(task_entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) static void set_io_uid_tasks_zero(struct uid_entry *uid_entry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) struct task_entry *task_entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) unsigned long bkt_task;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) hash_for_each(uid_entry->task_entries, bkt_task, task_entry, hash) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) memset(&task_entry->io[UID_STATE_TOTAL_CURR], 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) sizeof(struct io_stats));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) static void add_uid_tasks_io_stats(struct uid_entry *uid_entry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) struct task_struct *task, int slot)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) struct task_entry *task_entry = find_or_register_task(uid_entry, task);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) struct io_stats *task_io_slot = &task_entry->io[slot];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) task_io_slot->read_bytes += task->ioac.read_bytes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) task_io_slot->write_bytes += compute_write_bytes(task);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) task_io_slot->rchar += task->ioac.rchar;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) task_io_slot->wchar += task->ioac.wchar;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) task_io_slot->fsync += task->ioac.syscfs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) static void compute_io_uid_tasks(struct uid_entry *uid_entry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) struct task_entry *task_entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) unsigned long bkt_task;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) hash_for_each(uid_entry->task_entries, bkt_task, task_entry, hash) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) compute_io_bucket_stats(&task_entry->io[uid_entry->state],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) &task_entry->io[UID_STATE_TOTAL_CURR],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) &task_entry->io[UID_STATE_TOTAL_LAST],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) &task_entry->io[UID_STATE_DEAD_TASKS]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) static void show_io_uid_tasks(struct seq_file *m, struct uid_entry *uid_entry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) struct task_entry *task_entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) unsigned long bkt_task;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) hash_for_each(uid_entry->task_entries, bkt_task, task_entry, hash) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) /* Separated by comma because space exists in task comm */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) seq_printf(m, "task,%s,%lu,%llu,%llu,%llu,%llu,%llu,%llu,%llu,%llu,%llu,%llu\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) task_entry->comm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) (unsigned long)task_entry->pid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) task_entry->io[UID_STATE_FOREGROUND].rchar,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) task_entry->io[UID_STATE_FOREGROUND].wchar,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) task_entry->io[UID_STATE_FOREGROUND].read_bytes,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) task_entry->io[UID_STATE_FOREGROUND].write_bytes,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) task_entry->io[UID_STATE_BACKGROUND].rchar,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) task_entry->io[UID_STATE_BACKGROUND].wchar,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) task_entry->io[UID_STATE_BACKGROUND].read_bytes,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) task_entry->io[UID_STATE_BACKGROUND].write_bytes,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) task_entry->io[UID_STATE_FOREGROUND].fsync,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) task_entry->io[UID_STATE_BACKGROUND].fsync);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) static void remove_uid_tasks(struct uid_entry *uid_entry) {};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) static void set_io_uid_tasks_zero(struct uid_entry *uid_entry) {};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) static void add_uid_tasks_io_stats(struct uid_entry *uid_entry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) struct task_struct *task, int slot) {};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) static void compute_io_uid_tasks(struct uid_entry *uid_entry) {};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) static void show_io_uid_tasks(struct seq_file *m,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) struct uid_entry *uid_entry) {}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) static struct uid_entry *find_uid_entry(uid_t uid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) struct uid_entry *uid_entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) hash_for_each_possible(hash_table, uid_entry, hash, uid) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) if (uid_entry->uid == uid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) return uid_entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) static struct uid_entry *find_or_register_uid(uid_t uid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) struct uid_entry *uid_entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) uid_entry = find_uid_entry(uid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) if (uid_entry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) return uid_entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) uid_entry = kzalloc(sizeof(struct uid_entry), GFP_ATOMIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) if (!uid_entry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) uid_entry->uid = uid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) #ifdef CONFIG_UID_SYS_STATS_DEBUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) hash_init(uid_entry->task_entries);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) hash_add(hash_table, &uid_entry->hash, uid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) return uid_entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) static int uid_cputime_show(struct seq_file *m, void *v)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) struct uid_entry *uid_entry = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) struct task_struct *task, *temp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) struct user_namespace *user_ns = current_user_ns();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) u64 utime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) u64 stime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) unsigned long bkt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) uid_t uid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) rt_mutex_lock(&uid_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) hash_for_each(hash_table, bkt, uid_entry, hash) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) uid_entry->active_stime = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) uid_entry->active_utime = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) do_each_thread(temp, task) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) uid = from_kuid_munged(user_ns, task_uid(task));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) if (!uid_entry || uid_entry->uid != uid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) uid_entry = find_or_register_uid(uid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) if (!uid_entry) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) rt_mutex_unlock(&uid_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) pr_err("%s: failed to find the uid_entry for uid %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) __func__, uid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) /* avoid double accounting of dying threads */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) if (!(task->flags & PF_EXITING)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) task_cputime_adjusted(task, &utime, &stime);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) uid_entry->active_utime += utime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) uid_entry->active_stime += stime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) } while_each_thread(temp, task);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) hash_for_each(hash_table, bkt, uid_entry, hash) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) u64 total_utime = uid_entry->utime +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) uid_entry->active_utime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) u64 total_stime = uid_entry->stime +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) uid_entry->active_stime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) seq_printf(m, "%d: %llu %llu\n", uid_entry->uid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) ktime_to_us(total_utime), ktime_to_us(total_stime));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) rt_mutex_unlock(&uid_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) static int uid_cputime_open(struct inode *inode, struct file *file)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) return single_open(file, uid_cputime_show, PDE_DATA(inode));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) static const struct proc_ops uid_cputime_fops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) .proc_open = uid_cputime_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) .proc_read = seq_read,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) .proc_lseek = seq_lseek,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) .proc_release = single_release,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) static int uid_remove_open(struct inode *inode, struct file *file)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) return single_open(file, NULL, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) static ssize_t uid_remove_write(struct file *file,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) const char __user *buffer, size_t count, loff_t *ppos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) struct uid_entry *uid_entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) struct hlist_node *tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) char uids[128];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) char *start_uid, *end_uid = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) long int uid_start = 0, uid_end = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) if (count >= sizeof(uids))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) count = sizeof(uids) - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) if (copy_from_user(uids, buffer, count))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) uids[count] = '\0';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) end_uid = uids;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) start_uid = strsep(&end_uid, "-");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) if (!start_uid || !end_uid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) if (kstrtol(start_uid, 10, &uid_start) != 0 ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) kstrtol(end_uid, 10, &uid_end) != 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) rt_mutex_lock(&uid_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) for (; uid_start <= uid_end; uid_start++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) hash_for_each_possible_safe(hash_table, uid_entry, tmp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) hash, (uid_t)uid_start) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) if (uid_start == uid_entry->uid) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) remove_uid_tasks(uid_entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) hash_del(&uid_entry->hash);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) kfree(uid_entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) rt_mutex_unlock(&uid_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) return count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) static const struct proc_ops uid_remove_fops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) .proc_open = uid_remove_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) .proc_release = single_release,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) .proc_write = uid_remove_write,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) static void add_uid_io_stats(struct uid_entry *uid_entry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) struct task_struct *task, int slot)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) struct io_stats *io_slot = &uid_entry->io[slot];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) /* avoid double accounting of dying threads */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) if (slot != UID_STATE_DEAD_TASKS && (task->flags & PF_EXITING))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) io_slot->read_bytes += task->ioac.read_bytes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) io_slot->write_bytes += compute_write_bytes(task);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) io_slot->rchar += task->ioac.rchar;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) io_slot->wchar += task->ioac.wchar;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) io_slot->fsync += task->ioac.syscfs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) add_uid_tasks_io_stats(uid_entry, task, slot);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) static void update_io_stats_all_locked(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) struct uid_entry *uid_entry = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) struct task_struct *task, *temp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) struct user_namespace *user_ns = current_user_ns();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) unsigned long bkt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) uid_t uid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) hash_for_each(hash_table, bkt, uid_entry, hash) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) memset(&uid_entry->io[UID_STATE_TOTAL_CURR], 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) sizeof(struct io_stats));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) set_io_uid_tasks_zero(uid_entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) do_each_thread(temp, task) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) uid = from_kuid_munged(user_ns, task_uid(task));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) if (!uid_entry || uid_entry->uid != uid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) uid_entry = find_or_register_uid(uid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) if (!uid_entry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) add_uid_io_stats(uid_entry, task, UID_STATE_TOTAL_CURR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) } while_each_thread(temp, task);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) hash_for_each(hash_table, bkt, uid_entry, hash) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) compute_io_bucket_stats(&uid_entry->io[uid_entry->state],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) &uid_entry->io[UID_STATE_TOTAL_CURR],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) &uid_entry->io[UID_STATE_TOTAL_LAST],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) &uid_entry->io[UID_STATE_DEAD_TASKS]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) compute_io_uid_tasks(uid_entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) static void update_io_stats_uid_locked(struct uid_entry *uid_entry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) struct task_struct *task, *temp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) struct user_namespace *user_ns = current_user_ns();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) memset(&uid_entry->io[UID_STATE_TOTAL_CURR], 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) sizeof(struct io_stats));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) set_io_uid_tasks_zero(uid_entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) do_each_thread(temp, task) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) if (from_kuid_munged(user_ns, task_uid(task)) != uid_entry->uid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) add_uid_io_stats(uid_entry, task, UID_STATE_TOTAL_CURR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) } while_each_thread(temp, task);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) compute_io_bucket_stats(&uid_entry->io[uid_entry->state],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) &uid_entry->io[UID_STATE_TOTAL_CURR],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) &uid_entry->io[UID_STATE_TOTAL_LAST],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) &uid_entry->io[UID_STATE_DEAD_TASKS]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) compute_io_uid_tasks(uid_entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) static int uid_io_show(struct seq_file *m, void *v)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) struct uid_entry *uid_entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) unsigned long bkt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) rt_mutex_lock(&uid_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) update_io_stats_all_locked();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) hash_for_each(hash_table, bkt, uid_entry, hash) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) seq_printf(m, "%d %llu %llu %llu %llu %llu %llu %llu %llu %llu %llu\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) uid_entry->uid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) uid_entry->io[UID_STATE_FOREGROUND].rchar,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) uid_entry->io[UID_STATE_FOREGROUND].wchar,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) uid_entry->io[UID_STATE_FOREGROUND].read_bytes,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) uid_entry->io[UID_STATE_FOREGROUND].write_bytes,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) uid_entry->io[UID_STATE_BACKGROUND].rchar,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) uid_entry->io[UID_STATE_BACKGROUND].wchar,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) uid_entry->io[UID_STATE_BACKGROUND].read_bytes,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) uid_entry->io[UID_STATE_BACKGROUND].write_bytes,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) uid_entry->io[UID_STATE_FOREGROUND].fsync,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) uid_entry->io[UID_STATE_BACKGROUND].fsync);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) show_io_uid_tasks(m, uid_entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) rt_mutex_unlock(&uid_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) static int uid_io_open(struct inode *inode, struct file *file)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) return single_open(file, uid_io_show, PDE_DATA(inode));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) static const struct proc_ops uid_io_fops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) .proc_open = uid_io_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) .proc_read = seq_read,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) .proc_lseek = seq_lseek,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) .proc_release = single_release,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) static int uid_procstat_open(struct inode *inode, struct file *file)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) return single_open(file, NULL, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) static ssize_t uid_procstat_write(struct file *file,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) const char __user *buffer, size_t count, loff_t *ppos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) struct uid_entry *uid_entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) uid_t uid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) int argc, state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) char input[128];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) if (count >= sizeof(input))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) if (copy_from_user(input, buffer, count))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) input[count] = '\0';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) argc = sscanf(input, "%u %d", &uid, &state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) if (argc != 2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) if (state != UID_STATE_BACKGROUND && state != UID_STATE_FOREGROUND)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) rt_mutex_lock(&uid_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) uid_entry = find_or_register_uid(uid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) if (!uid_entry) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) rt_mutex_unlock(&uid_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) if (uid_entry->state == state) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) rt_mutex_unlock(&uid_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) return count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) update_io_stats_uid_locked(uid_entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) uid_entry->state = state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) rt_mutex_unlock(&uid_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) return count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) static const struct proc_ops uid_procstat_fops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) .proc_open = uid_procstat_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) .proc_release = single_release,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) .proc_write = uid_procstat_write,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) static int process_notifier(struct notifier_block *self,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) unsigned long cmd, void *v)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) struct task_struct *task = v;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) struct uid_entry *uid_entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) u64 utime, stime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) uid_t uid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) if (!task)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) return NOTIFY_OK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) rt_mutex_lock(&uid_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) uid = from_kuid_munged(current_user_ns(), task_uid(task));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) uid_entry = find_or_register_uid(uid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) if (!uid_entry) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) pr_err("%s: failed to find uid %d\n", __func__, uid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) goto exit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) task_cputime_adjusted(task, &utime, &stime);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) uid_entry->utime += utime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) uid_entry->stime += stime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) add_uid_io_stats(uid_entry, task, UID_STATE_DEAD_TASKS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) exit:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) rt_mutex_unlock(&uid_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) return NOTIFY_OK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) static struct notifier_block process_notifier_block = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) .notifier_call = process_notifier,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) static int __init proc_uid_sys_stats_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) hash_init(hash_table);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) cpu_parent = proc_mkdir("uid_cputime", NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) if (!cpu_parent) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) pr_err("%s: failed to create uid_cputime proc entry\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) proc_create_data("remove_uid_range", 0222, cpu_parent,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) &uid_remove_fops, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) proc_create_data("show_uid_stat", 0444, cpu_parent,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673) &uid_cputime_fops, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) io_parent = proc_mkdir("uid_io", NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) if (!io_parent) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) pr_err("%s: failed to create uid_io proc entry\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678) __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) proc_create_data("stats", 0444, io_parent,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) &uid_io_fops, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) proc_parent = proc_mkdir("uid_procstat", NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) if (!proc_parent) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687) pr_err("%s: failed to create uid_procstat proc entry\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688) __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) proc_create_data("set", 0222, proc_parent,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) &uid_procstat_fops, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) profile_event_register(PROFILE_TASK_EXIT, &process_notifier_block);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699) err:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) remove_proc_subtree("uid_cputime", NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) remove_proc_subtree("uid_io", NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) remove_proc_subtree("uid_procstat", NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) early_initcall(proc_uid_sys_stats_init);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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