Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) #include <linux/compiler.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4) #include <linux/string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5) #include <linux/zalloc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6) #include <sys/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7) #include <sys/stat.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) #include <errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #include <fcntl.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <unistd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <asm/bug.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <dirent.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include "data.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include "util.h" // rm_rf_perf_data()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include "debug.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #include "header.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) #include <internal/lib.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) static void close_dir(struct perf_data_file *files, int nr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) 	while (--nr >= 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) 		close(files[nr].fd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 		zfree(&files[nr].path);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 	free(files);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) void perf_data__close_dir(struct perf_data *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 	close_dir(data->dir.files, data->dir.nr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) int perf_data__create_dir(struct perf_data *data, int nr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 	struct perf_data_file *files = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 	int i, ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 	if (WARN_ON(!data->is_dir))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 	files = zalloc(nr * sizeof(*files));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 	if (!files)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	for (i = 0; i < nr; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 		struct perf_data_file *file = &files[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 		ret = asprintf(&file->path, "%s/data.%d", data->path, i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 		if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 			goto out_err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 		ret = open(file->path, O_RDWR|O_CREAT|O_TRUNC, S_IRUSR|S_IWUSR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 		if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 			goto out_err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 		file->fd = ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 	data->dir.version = PERF_DIR_VERSION;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 	data->dir.files   = files;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 	data->dir.nr      = nr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) out_err:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 	close_dir(files, i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) int perf_data__open_dir(struct perf_data *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 	struct perf_data_file *files = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	struct dirent *dent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	int ret = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 	DIR *dir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 	int nr = 0;
^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) 	 * Directory containing a single regular perf data file which is already
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 	 * open, means there is nothing more to do here.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 	if (perf_data__is_single_file(data))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 	if (WARN_ON(!data->is_dir))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 	/* The version is provided by DIR_FORMAT feature. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 	if (WARN_ON(data->dir.version != PERF_DIR_VERSION))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 		return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 	dir = opendir(data->path);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 	if (!dir)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 	while ((dent = readdir(dir)) != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 		struct perf_data_file *file;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 		char path[PATH_MAX];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 		struct stat st;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 		snprintf(path, sizeof(path), "%s/%s", data->path, dent->d_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 		if (stat(path, &st))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 		if (!S_ISREG(st.st_mode) || strncmp(dent->d_name, "data.", 5))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 		ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 		file = realloc(files, (nr + 1) * sizeof(*files));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 		if (!file)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 			goto out_err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 		files = file;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 		file = &files[nr++];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 		file->path = strdup(path);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 		if (!file->path)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 			goto out_err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 		ret = open(file->path, O_RDONLY);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 		if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 			goto out_err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 		file->fd = ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 		file->size = st.st_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 	if (!files)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 	data->dir.files = files;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 	data->dir.nr    = nr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) out_err:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	close_dir(files, nr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) int perf_data__update_dir(struct perf_data *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 	if (WARN_ON(!data->is_dir))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 	for (i = 0; i < data->dir.nr; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 		struct perf_data_file *file = &data->dir.files[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 		struct stat st;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 		if (fstat(file->fd, &st))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 			return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 		file->size = st.st_size;
^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) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) static bool check_pipe(struct perf_data *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 	struct stat st;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 	bool is_pipe = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 	int fd = perf_data__is_read(data) ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 		 STDIN_FILENO : STDOUT_FILENO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 	if (!data->path) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 		if (!fstat(fd, &st) && S_ISFIFO(st.st_mode))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 			is_pipe = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 		if (!strcmp(data->path, "-"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 			is_pipe = true;
^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) 	if (is_pipe)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 		data->file.fd = fd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 	return data->is_pipe = is_pipe;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) static int check_backup(struct perf_data *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 	struct stat st;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 	if (perf_data__is_read(data))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 	if (!stat(data->path, &st) && st.st_size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 		char oldname[PATH_MAX];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 		int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 		snprintf(oldname, sizeof(oldname), "%s.old",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 			 data->path);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 		ret = rm_rf_perf_data(oldname);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 		if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 			pr_err("Can't remove old data: %s (%s)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 			       ret == -2 ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 			       "Unknown file found" : strerror(errno),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 			       oldname);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 			return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 		if (rename(data->path, oldname)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 			pr_err("Can't move data: %s (%s to %s)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 			       strerror(errno),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 			       data->path, oldname);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 			return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) static bool is_dir(struct perf_data *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 	struct stat st;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 	if (stat(data->path, &st))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 		return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 	return (st.st_mode & S_IFMT) == S_IFDIR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) static int open_file_read(struct perf_data *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 	struct stat st;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 	int fd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 	char sbuf[STRERR_BUFSIZE];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 	fd = open(data->file.path, O_RDONLY);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 	if (fd < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 		int err = errno;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 		pr_err("failed to open %s: %s", data->file.path,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 			str_error_r(err, sbuf, sizeof(sbuf)));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 		if (err == ENOENT && !strcmp(data->file.path, "perf.data"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 			pr_err("  (try 'perf record' first)");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 		pr_err("\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 		return -err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 	if (fstat(fd, &st) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 		goto out_close;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 	if (!data->force && st.st_uid && (st.st_uid != geteuid())) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 		pr_err("File %s not owned by current user or root (use -f to override)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 		       data->file.path);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 		goto out_close;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 	if (!st.st_size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 		pr_info("zero-sized data (%s), nothing to do!\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 			data->file.path);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 		goto out_close;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 	data->file.size = st.st_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 	return fd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263)  out_close:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 	close(fd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 	return -1;
^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 int open_file_write(struct perf_data *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 	int fd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 	char sbuf[STRERR_BUFSIZE];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 	fd = open(data->file.path, O_CREAT|O_RDWR|O_TRUNC|O_CLOEXEC,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 		  S_IRUSR|S_IWUSR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 	if (fd < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 		pr_err("failed to open %s : %s\n", data->file.path,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 			str_error_r(errno, sbuf, sizeof(sbuf)));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 	return fd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) static int open_file(struct perf_data *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 	int fd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 	fd = perf_data__is_read(data) ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 	     open_file_read(data) : open_file_write(data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 	if (fd < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 		zfree(&data->file.path);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 		return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 	data->file.fd = fd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) static int open_file_dup(struct perf_data *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 	data->file.path = strdup(data->path);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 	if (!data->file.path)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) 	return open_file(data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) static int open_dir(struct perf_data *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) 	 * So far we open only the header, so we can read the data version and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) 	 * layout.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) 	if (asprintf(&data->file.path, "%s/data", data->path) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) 		return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) 	if (perf_data__is_write(data) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) 	    mkdir(data->path, S_IRWXU) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) 		return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) 	ret = open_file(data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) 	/* Cleanup whatever we managed to create so far. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) 	if (ret && perf_data__is_write(data))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) 		rm_rf_perf_data(data->path);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) int perf_data__open(struct perf_data *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) 	if (check_pipe(data))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) 	if (!data->path)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) 		data->path = "perf.data";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) 	if (check_backup(data))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) 		return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) 	if (perf_data__is_read(data))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) 		data->is_dir = is_dir(data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) 	return perf_data__is_dir(data) ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) 	       open_dir(data) : open_file_dup(data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) void perf_data__close(struct perf_data *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) 	if (perf_data__is_dir(data))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) 		perf_data__close_dir(data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) 	zfree(&data->file.path);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) 	close(data->file.fd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) ssize_t perf_data_file__write(struct perf_data_file *file,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) 			      void *buf, size_t size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) 	return writen(file->fd, buf, size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) ssize_t perf_data__write(struct perf_data *data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) 			      void *buf, size_t size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) 	return perf_data_file__write(&data->file, buf, size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) int perf_data__switch(struct perf_data *data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) 			   const char *postfix,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) 			   size_t pos, bool at_exit,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) 			   char **new_filepath)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) 	if (check_pipe(data))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) 	if (perf_data__is_read(data))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) 	if (asprintf(new_filepath, "%s.%s", data->path, postfix) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) 		return -ENOMEM;
^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) 	 * Only fire a warning, don't return error, continue fill
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) 	 * original file.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) 	if (rename(data->path, *new_filepath))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) 		pr_warning("Failed to rename %s to %s\n", data->path, *new_filepath);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) 	if (!at_exit) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) 		close(data->file.fd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) 		ret = perf_data__open(data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) 		if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) 			goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) 		if (lseek(data->file.fd, pos, SEEK_SET) == (off_t)-1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) 			ret = -errno;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) 			pr_debug("Failed to lseek to %zu: %s",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) 				 pos, strerror(errno));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) 			goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) 	ret = data->file.fd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) unsigned long perf_data__size(struct perf_data *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) 	u64 size = data->file.size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) 	if (perf_data__is_single_file(data))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) 		return size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) 	for (i = 0; i < data->dir.nr; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) 		struct perf_data_file *file = &data->dir.files[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) 		size += file->size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) 	return size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) int perf_data__make_kcore_dir(struct perf_data *data, char *buf, size_t buf_sz)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) 	if (!data->is_dir)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) 		return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) 	ret = snprintf(buf, buf_sz, "%s/kcore_dir", data->path);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) 	if (ret < 0 || (size_t)ret >= buf_sz)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) 		return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) 	return mkdir(buf, S_IRWXU);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) char *perf_data__kallsyms_name(struct perf_data *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) 	char *kallsyms_name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) 	struct stat st;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) 	if (!data->is_dir)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) 		return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) 	if (asprintf(&kallsyms_name, "%s/kcore_dir/kallsyms", data->path) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) 		return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) 	if (stat(kallsyms_name, &st)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) 		free(kallsyms_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) 		return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) 	return kallsyms_name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) }