^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) * @file oprofile_files.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * @remark Copyright 2002 OProfile authors
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * @remark Read the file COPYING
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * @author John Levon <levon@movementarian.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/oprofile.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/jiffies.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include "event_buffer.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include "oprofile_stats.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include "oprof.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #define BUFFER_SIZE_DEFAULT 131072
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #define CPU_BUFFER_SIZE_DEFAULT 8192
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #define BUFFER_WATERSHED_DEFAULT 32768 /* FIXME: tune */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #define TIME_SLICE_DEFAULT 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) unsigned long oprofile_buffer_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) unsigned long oprofile_cpu_buffer_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) unsigned long oprofile_buffer_watershed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) unsigned long oprofile_time_slice;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #ifdef CONFIG_OPROFILE_EVENT_MULTIPLEX
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) static ssize_t timeout_read(struct file *file, char __user *buf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) size_t count, loff_t *offset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) return oprofilefs_ulong_to_user(jiffies_to_msecs(oprofile_time_slice),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) buf, count, offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) static ssize_t timeout_write(struct file *file, char const __user *buf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) size_t count, loff_t *offset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) unsigned long val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) int retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) if (*offset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) retval = oprofilefs_ulong_from_user(&val, buf, count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) if (retval <= 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) return retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) retval = oprofile_set_timeout(val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) if (retval)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) return retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) return count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) static const struct file_operations timeout_fops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) .read = timeout_read,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) .write = timeout_write,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) .llseek = default_llseek,
^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) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) static ssize_t depth_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) return oprofilefs_ulong_to_user(oprofile_backtrace_depth, buf, count,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) static ssize_t depth_write(struct file *file, char const __user *buf, size_t count, loff_t *offset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) unsigned long val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) int retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) if (*offset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) if (!oprofile_ops.backtrace)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) retval = oprofilefs_ulong_from_user(&val, buf, count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) if (retval <= 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) return retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) retval = oprofile_set_ulong(&oprofile_backtrace_depth, val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) if (retval)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) return retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) return count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) static const struct file_operations depth_fops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) .read = depth_read,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) .write = depth_write,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) .llseek = default_llseek,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) static ssize_t pointer_size_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) return oprofilefs_ulong_to_user(sizeof(void *), buf, count, offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) static const struct file_operations pointer_size_fops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) .read = pointer_size_read,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) .llseek = default_llseek,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) static ssize_t cpu_type_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) return oprofilefs_str_to_user(oprofile_ops.cpu_type, buf, count, offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) static const struct file_operations cpu_type_fops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) .read = cpu_type_read,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) .llseek = default_llseek,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) static ssize_t enable_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) return oprofilefs_ulong_to_user(oprofile_started, buf, count, offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) static ssize_t enable_write(struct file *file, char const __user *buf, size_t count, loff_t *offset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) unsigned long val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) int retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) if (*offset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) retval = oprofilefs_ulong_from_user(&val, buf, count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) if (retval <= 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) return retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) retval = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) if (val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) retval = oprofile_start();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) oprofile_stop();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) if (retval)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) return retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) return count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) static const struct file_operations enable_fops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) .read = enable_read,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) .write = enable_write,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) .llseek = default_llseek,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) static ssize_t dump_write(struct file *file, char const __user *buf, size_t count, loff_t *offset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) wake_up_buffer_waiter();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) return count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) static const struct file_operations dump_fops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) .write = dump_write,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) .llseek = noop_llseek,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) void oprofile_create_files(struct dentry *root)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) /* reinitialize default values */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) oprofile_buffer_size = BUFFER_SIZE_DEFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) oprofile_cpu_buffer_size = CPU_BUFFER_SIZE_DEFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) oprofile_buffer_watershed = BUFFER_WATERSHED_DEFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) oprofile_time_slice = msecs_to_jiffies(TIME_SLICE_DEFAULT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) oprofilefs_create_file(root, "enable", &enable_fops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) oprofilefs_create_file_perm(root, "dump", &dump_fops, 0666);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) oprofilefs_create_file(root, "buffer", &event_buffer_fops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) oprofilefs_create_ulong(root, "buffer_size", &oprofile_buffer_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) oprofilefs_create_ulong(root, "buffer_watershed", &oprofile_buffer_watershed);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) oprofilefs_create_ulong(root, "cpu_buffer_size", &oprofile_cpu_buffer_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) oprofilefs_create_file(root, "cpu_type", &cpu_type_fops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) oprofilefs_create_file(root, "backtrace_depth", &depth_fops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) oprofilefs_create_file(root, "pointer_size", &pointer_size_fops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) #ifdef CONFIG_OPROFILE_EVENT_MULTIPLEX
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) oprofilefs_create_file(root, "time_slice", &timeout_fops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) oprofile_create_stats_files(root);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) if (oprofile_ops.create_files)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) oprofile_ops.create_files(root);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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