Lines Matching +full:data +full:- +full:path
1 // SPDX-License-Identifier: GPL-2.0
16 #include "data.h"
25 while (--nr >= 0) {
27 zfree(&files[nr].path);
32 void perf_data__close_dir(struct perf_data *data)
34 close_dir(data->dir.files, data->dir.nr);
37 int perf_data__create_dir(struct perf_data *data, int nr)
43 if (WARN_ON(!data->is_dir))
44 return -EINVAL;
48 return -ENOMEM;
53 ret = asprintf(&file->path, "%s/data.%d", data->path, i);
55 ret = -ENOMEM;
60 ret = open(file->path, O_RDWR|O_CREAT|O_TRUNC, S_IRUSR|S_IWUSR);
63 * If using parallel threads to collect data,
70 ret = -errno;
75 file->fd = ret;
78 data->dir.version = PERF_DIR_VERSION;
79 data->dir.files = files;
80 data->dir.nr = nr;
88 int perf_data__open_dir(struct perf_data *data)
92 int ret = -1;
97 * Directory containing a single regular perf data file which is already
100 if (perf_data__is_single_file(data))
103 if (WARN_ON(!data->is_dir))
104 return -EINVAL;
107 if (WARN_ON(data->dir.version != PERF_DIR_VERSION))
108 return -1;
110 dir = opendir(data->path);
112 return -EINVAL;
116 char path[PATH_MAX];
119 snprintf(path, sizeof(path), "%s/%s", data->path, dent->d_name);
120 if (stat(path, &st))
123 if (!S_ISREG(st.st_mode) || strncmp(dent->d_name, "data.", 5))
126 ret = -ENOMEM;
135 file->path = strdup(path);
136 if (!file->path)
139 ret = open(file->path, O_RDONLY);
143 file->fd = ret;
144 file->size = st.st_size;
149 return -EINVAL;
151 data->dir.files = files;
152 data->dir.nr = nr;
161 static bool check_pipe(struct perf_data *data)
165 int fd = perf_data__is_read(data) ?
168 if (!data->path) {
172 if (!strcmp(data->path, "-"))
177 if (data->use_stdio) {
180 mode = perf_data__is_read(data) ? "r" : "w";
181 data->file.fptr = fdopen(fd, mode);
183 if (data->file.fptr == NULL) {
184 data->file.fd = fd;
185 data->use_stdio = false;
189 * When is_pipe and data->file.fd is given, use given fd
192 } else if (data->file.fd <= 0) {
193 data->file.fd = fd;
197 return data->is_pipe = is_pipe;
200 static int check_backup(struct perf_data *data)
204 if (perf_data__is_read(data))
207 if (!stat(data->path, &st) && st.st_size) {
212 data->path);
216 pr_err("Can't remove old data: %s (%s)\n",
217 ret == -2 ?
220 return -1;
223 if (rename(data->path, oldname)) {
224 pr_err("Can't move data: %s (%s to %s)\n",
226 data->path, oldname);
227 return -1;
234 static bool is_dir(struct perf_data *data)
238 if (stat(data->path, &st))
244 static int open_file_read(struct perf_data *data)
246 int flags = data->in_place_update ? O_RDWR : O_RDONLY;
251 fd = open(data->file.path, flags);
255 pr_err("failed to open %s: %s", data->file.path,
257 if (err == ENOENT && !strcmp(data->file.path, "perf.data"))
260 return -err;
266 if (!data->force && st.st_uid && (st.st_uid != geteuid())) {
267 pr_err("File %s not owned by current user or root (use -f to override)\n",
268 data->file.path);
273 pr_info("zero-sized data (%s), nothing to do!\n",
274 data->file.path);
278 data->file.size = st.st_size;
283 return -1;
286 static int open_file_write(struct perf_data *data)
291 fd = open(data->file.path, O_CREAT|O_RDWR|O_TRUNC|O_CLOEXEC,
295 pr_err("failed to open %s : %s\n", data->file.path,
301 static int open_file(struct perf_data *data)
305 fd = perf_data__is_read(data) ?
306 open_file_read(data) : open_file_write(data);
309 zfree(&data->file.path);
310 return -1;
313 data->file.fd = fd;
317 static int open_file_dup(struct perf_data *data)
319 data->file.path = strdup(data->path);
320 if (!data->file.path)
321 return -ENOMEM;
323 return open_file(data);
326 static int open_dir(struct perf_data *data)
331 * So far we open only the header, so we can read the data version and
334 if (asprintf(&data->file.path, "%s/data", data->path) < 0)
335 return -1;
337 if (perf_data__is_write(data) &&
338 mkdir(data->path, S_IRWXU) < 0)
339 return -1;
341 ret = open_file(data);
344 if (ret && perf_data__is_write(data))
345 rm_rf_perf_data(data->path);
350 int perf_data__open(struct perf_data *data)
352 if (check_pipe(data))
356 data->use_stdio = false;
358 if (!data->path)
359 data->path = "perf.data";
361 if (check_backup(data))
362 return -1;
364 if (perf_data__is_read(data))
365 data->is_dir = is_dir(data);
367 return perf_data__is_dir(data) ?
368 open_dir(data) : open_file_dup(data);
371 void perf_data__close(struct perf_data *data)
373 if (perf_data__is_dir(data))
374 perf_data__close_dir(data);
376 zfree(&data->file.path);
378 if (data->use_stdio)
379 fclose(data->file.fptr);
381 close(data->file.fd);
384 ssize_t perf_data__read(struct perf_data *data, void *buf, size_t size)
386 if (data->use_stdio) {
387 if (fread(buf, size, 1, data->file.fptr) == 1)
389 return feof(data->file.fptr) ? 0 : -1;
391 return readn(data->file.fd, buf, size);
397 return writen(file->fd, buf, size);
400 ssize_t perf_data__write(struct perf_data *data,
403 if (data->use_stdio) {
404 if (fwrite(buf, size, 1, data->file.fptr) == 1)
406 return -1;
408 return perf_data_file__write(&data->file, buf, size);
411 int perf_data__switch(struct perf_data *data,
418 if (perf_data__is_read(data))
419 return -EINVAL;
421 if (asprintf(new_filepath, "%s.%s", data->path, postfix) < 0)
422 return -ENOMEM;
428 if (rename(data->path, *new_filepath))
429 pr_warning("Failed to rename %s to %s\n", data->path, *new_filepath);
432 close(data->file.fd);
433 ret = perf_data__open(data);
437 if (lseek(data->file.fd, pos, SEEK_SET) == (off_t)-1) {
438 ret = -errno;
444 ret = data->file.fd;
449 unsigned long perf_data__size(struct perf_data *data)
451 u64 size = data->file.size;
454 if (perf_data__is_single_file(data))
457 for (i = 0; i < data->dir.nr; i++) {
458 struct perf_data_file *file = &data->dir.files[i];
460 size += file->size;
466 int perf_data__make_kcore_dir(struct perf_data *data, char *buf, size_t buf_sz)
470 if (!data->is_dir)
471 return -1;
473 ret = snprintf(buf, buf_sz, "%s/kcore_dir", data->path);
475 return -1;
480 bool has_kcore_dir(const char *path)
482 struct dirent *d = ERR_PTR(-EINVAL);
484 DIR *dir = opendir(path);
491 result = d ? strncmp(d->d_name, name, n) : false;
499 char *perf_data__kallsyms_name(struct perf_data *data)
504 if (!data->is_dir)
507 if (asprintf(&kallsyms_name, "%s/kcore_dir/kallsyms", data->path) < 0)
518 char *perf_data__guest_kallsyms_name(struct perf_data *data, pid_t machine_pid)
523 if (!data->is_dir)
526 if (asprintf(&kallsyms_name, "%s/kcore_dir__%d/kallsyms", data->path, machine_pid) < 0)
537 bool is_perf_data(const char *path)
543 file = fopen(path, "r");