^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Copyright (C) 2008,2009, Steven Rostedt <srostedt@redhat.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) #include <dirent.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) #include <mntent.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #include <stdio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <stdlib.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <stdarg.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <sys/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <sys/stat.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <sys/wait.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <fcntl.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <unistd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <stdbool.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/list.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/zalloc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <internal/lib.h> // page_size
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include "trace-event.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <api/fs/tracing_path.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include "evsel.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include "debug.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #define VERSION "0.6"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) static int output_fd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) int bigendian(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) unsigned char str[] = { 0x1, 0x2, 0x3, 0x4, 0x0, 0x0, 0x0, 0x0};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) unsigned int *ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) ptr = (unsigned int *)(void *)str;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) return *ptr == 0x01020304;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) /* unfortunately, you can not stat debugfs or proc files for size */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) static int record_file(const char *file, ssize_t hdr_sz)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) unsigned long long size = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) char buf[BUFSIZ], *sizep;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) off_t hdr_pos = lseek(output_fd, 0, SEEK_CUR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) int r, fd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) int err = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) fd = open(file, O_RDONLY);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) if (fd < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) pr_debug("Can't read '%s'", file);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) return -errno;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) /* put in zeros for file size, then fill true size later */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) if (hdr_sz) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) if (write(output_fd, &size, hdr_sz) != hdr_sz)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) r = read(fd, buf, BUFSIZ);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) if (r > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) size += r;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) if (write(output_fd, buf, r) != r)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) } while (r > 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) /* ugh, handle big-endian hdr_size == 4 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) sizep = (char*)&size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) if (bigendian())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) sizep += sizeof(u64) - hdr_sz;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) if (hdr_sz && pwrite(output_fd, sizep, hdr_sz, hdr_pos) < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) pr_debug("writing file size failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) close(fd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) return err;
^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 int record_header_files(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) char *path = get_events_file("header_page");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) struct stat st;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) int err = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) if (!path) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) pr_debug("can't get tracing/events/header_page");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) if (stat(path, &st) < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) pr_debug("can't read '%s'", path);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) goto out;
^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) if (write(output_fd, "header_page", 12) != 12) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) pr_debug("can't write header_page\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) if (record_file(path, 8) < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) pr_debug("can't record header_page file\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) put_events_file(path);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) path = get_events_file("header_event");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) if (!path) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) pr_debug("can't get tracing/events/header_event");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) err = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) goto out;
^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) if (stat(path, &st) < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) pr_debug("can't read '%s'", path);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) goto out;
^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) if (write(output_fd, "header_event", 13) != 13) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) pr_debug("can't write header_event\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) if (record_file(path, 8) < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) pr_debug("can't record header_event file\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) put_events_file(path);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) static bool name_in_tp_list(char *sys, struct tracepoint_path *tps)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) while (tps) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) if (!strcmp(sys, tps->name))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) tps = tps->next;
^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) return false;
^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) #define for_each_event(dir, dent, tps) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) while ((dent = readdir(dir))) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) if (dent->d_type == DT_DIR && \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) (strcmp(dent->d_name, ".")) && \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) (strcmp(dent->d_name, ".."))) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) static int copy_event_system(const char *sys, struct tracepoint_path *tps)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) struct dirent *dent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) struct stat st;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) char *format;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) DIR *dir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) int count = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) dir = opendir(sys);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) if (!dir) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) pr_debug("can't read directory '%s'", sys);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) return -errno;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) for_each_event(dir, dent, tps) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) if (!name_in_tp_list(dent->d_name, tps))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) if (asprintf(&format, "%s/%s/format", sys, dent->d_name) < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) err = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) ret = stat(format, &st);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) free(format);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) count++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) if (write(output_fd, &count, 4) != 4) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) err = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) pr_debug("can't write count\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) rewinddir(dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) for_each_event(dir, dent, tps) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) if (!name_in_tp_list(dent->d_name, tps))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) if (asprintf(&format, "%s/%s/format", sys, dent->d_name) < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) err = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) ret = stat(format, &st);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) if (ret >= 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) err = record_file(format, 8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) free(format);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) free(format);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) closedir(dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) static int record_ftrace_files(struct tracepoint_path *tps)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) char *path;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) path = get_events_file("ftrace");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) if (!path) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) pr_debug("can't get tracing/events/ftrace");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) ret = copy_event_system(path, tps);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) put_tracing_file(path);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) return ret;
^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 bool system_in_tp_list(char *sys, struct tracepoint_path *tps)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) while (tps) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) if (!strcmp(sys, tps->system))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) tps = tps->next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) static int record_event_files(struct tracepoint_path *tps)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) struct dirent *dent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) struct stat st;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) char *path;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) char *sys;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) DIR *dir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) int count = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) path = get_tracing_file("events");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) if (!path) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) pr_debug("can't get tracing/events");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) dir = opendir(path);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) if (!dir) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) err = -errno;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) pr_debug("can't read directory '%s'", path);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) for_each_event(dir, dent, tps) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) if (strcmp(dent->d_name, "ftrace") == 0 ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) !system_in_tp_list(dent->d_name, tps))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) count++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) if (write(output_fd, &count, 4) != 4) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) err = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) pr_debug("can't write count\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) rewinddir(dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) for_each_event(dir, dent, tps) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) if (strcmp(dent->d_name, "ftrace") == 0 ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) !system_in_tp_list(dent->d_name, tps))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) if (asprintf(&sys, "%s/%s", path, dent->d_name) < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) err = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) ret = stat(sys, &st);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) if (ret >= 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) ssize_t size = strlen(dent->d_name) + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) if (write(output_fd, dent->d_name, size) != size ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) copy_event_system(sys, tps) < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) err = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) free(sys);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) free(sys);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) closedir(dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) put_tracing_file(path);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) static int record_proc_kallsyms(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) unsigned long long size = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) * Just to keep older perf.data file parsers happy, record a zero
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) * sized kallsyms file, i.e. do the same thing that was done when
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) * /proc/kallsyms (or something specified via --kallsyms, in a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) * different path) couldn't be read.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) return write(output_fd, &size, 4) != 4 ? -EIO : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) static int record_ftrace_printk(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) unsigned int size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) char *path;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) struct stat st;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) int ret, err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) path = get_tracing_file("printk_formats");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) if (!path) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) pr_debug("can't get tracing/printk_formats");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) ret = stat(path, &st);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) /* not found */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) size = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) if (write(output_fd, &size, 4) != 4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) err = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) err = record_file(path, 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) put_tracing_file(path);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) static int record_saved_cmdline(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) unsigned long long size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) char *path;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) struct stat st;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) int ret, err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) path = get_tracing_file("saved_cmdlines");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) if (!path) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) pr_debug("can't get tracing/saved_cmdline");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) ret = stat(path, &st);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) /* not found */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) size = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) if (write(output_fd, &size, 8) != 8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) err = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) err = record_file(path, 8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) put_tracing_file(path);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) static void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) put_tracepoints_path(struct tracepoint_path *tps)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) while (tps) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) struct tracepoint_path *t = tps;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) tps = tps->next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) zfree(&t->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) zfree(&t->system);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) free(t);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) static struct tracepoint_path *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) get_tracepoints_path(struct list_head *pattrs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) struct tracepoint_path path, *ppath = &path;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) struct evsel *pos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) int nr_tracepoints = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) list_for_each_entry(pos, pattrs, core.node) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) if (pos->core.attr.type != PERF_TYPE_TRACEPOINT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) ++nr_tracepoints;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) if (pos->name) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) ppath->next = tracepoint_name_to_path(pos->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) if (ppath->next)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) goto next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) if (strchr(pos->name, ':') == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) goto try_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) goto error;
^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) try_id:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) ppath->next = tracepoint_id_to_path(pos->core.attr.config);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) if (!ppath->next) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) error:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) pr_debug("No memory to alloc tracepoints list\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) put_tracepoints_path(path.next);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) next:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) ppath = ppath->next;
^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) return nr_tracepoints > 0 ? path.next : NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) bool have_tracepoints(struct list_head *pattrs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) struct evsel *pos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) list_for_each_entry(pos, pattrs, core.node)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) if (pos->core.attr.type == PERF_TYPE_TRACEPOINT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) static int tracing_data_header(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) char buf[20];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) ssize_t size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) /* just guessing this is someone's birthday.. ;) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) buf[0] = 23;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) buf[1] = 8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) buf[2] = 68;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) memcpy(buf + 3, "tracing", 7);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) if (write(output_fd, buf, 10) != 10)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) size = strlen(VERSION) + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) if (write(output_fd, VERSION, size) != size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) /* save endian */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) if (bigendian())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) buf[0] = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) buf[0] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) if (write(output_fd, buf, 1) != 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) /* save size of long */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) buf[0] = sizeof(long);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) if (write(output_fd, buf, 1) != 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) /* save page_size */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) if (write(output_fd, &page_size, 4) != 4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) struct tracing_data *tracing_data_get(struct list_head *pattrs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) int fd, bool temp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) struct tracepoint_path *tps;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) struct tracing_data *tdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) output_fd = fd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) tps = get_tracepoints_path(pattrs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) if (!tps)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) tdata = malloc(sizeof(*tdata));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) if (!tdata)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) tdata->temp = temp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) tdata->size = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) if (temp) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) int temp_fd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) snprintf(tdata->temp_file, sizeof(tdata->temp_file),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) "/tmp/perf-XXXXXX");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) if (!mkstemp(tdata->temp_file)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) pr_debug("Can't make temp file");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) free(tdata);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) temp_fd = open(tdata->temp_file, O_RDWR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) if (temp_fd < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) pr_debug("Can't read '%s'", tdata->temp_file);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) free(tdata);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) * Set the temp file the default output, so all the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) * tracing data are stored into it.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) output_fd = temp_fd;
^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) err = tracing_data_header();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) err = record_header_files();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) err = record_ftrace_files(tps);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) err = record_event_files(tps);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) err = record_proc_kallsyms();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) err = record_ftrace_printk();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) err = record_saved_cmdline();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) * All tracing data are stored by now, we can restore
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) * the default output file in case we used temp file.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) if (temp) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) tdata->size = lseek(output_fd, 0, SEEK_CUR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) close(output_fd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) output_fd = fd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) zfree(&tdata);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) put_tracepoints_path(tps);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) return tdata;
^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) int tracing_data_put(struct tracing_data *tdata)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) int err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) if (tdata->temp) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) err = record_file(tdata->temp_file, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) unlink(tdata->temp_file);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) free(tdata);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) int read_tracing_data(int fd, struct list_head *pattrs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) struct tracing_data *tdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) * We work over the real file, so we can write data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) * directly, no temp file is needed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) tdata = tracing_data_get(pattrs, fd, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) if (!tdata)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) err = tracing_data_put(tdata);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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