[PATCH] faster and safer fpm config reading

13 years ago by Martin Pelikan — view source — reply

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commit edae18ccf5c51ae0bcc0e9655ead7540fd42dd9f
Author: Martin Pelikan pelikan@storkhole.cz
Date: Wed May 8 02:06:09 2013 +0200

Faster and safer parsing of fpm configuration.

The current fpm config parser did a read(2) syscall per character,
which obfuscated debugging strace/ktrace output somewhat.  This also
makes the 1024 characters per line limit more explicit, so the users
will know what were they hitting.

It might improve performance during php-fpm load (.03 vs .00 seconds
on my laptop) but primarily serves to help observing fpm system call
traces during deployment (in chroot for example).

Signed-off-by: Martin Pelikan <martin.pelikan@gmail.com>

diff --git a/sapi/fpm/fpm/fpm_conf.c b/sapi/fpm/fpm/fpm_conf.c
index 0a8a0e3..e004934 100644
--- a/sapi/fpm/fpm/fpm_conf.c
+++ b/sapi/fpm/fpm/fpm_conf.c
@@ -1447,11 +1447,11 @@ static void fpm_conf_ini_parser(zval *arg1, zval *arg2, zval *arg3, int callback

int fpm_conf_load_ini_file(char filename TSRMLS_DC) / {{{ */
{

const int bufsize = 1024;
int error = 0;

char buf[1024+1];
int fd, n;

char buf[bufsize], *newl;
int fd, pos = 0;
int nb_read = 1;

char c = '*';

int ret = 1;

@@ -1473,36 +1473,48 @@ int fpm_conf_load_ini_file(char filename TSRMLS_DC) / {{{ */
}

ini_lineno = 0;

memset(buf, 0, sizeof buf);
while (nb_read > 0) {
int tmp;

  memset(buf, 0, sizeof(char) * (1024 + 1));

  for (n = 0; n < 1024 && (nb_read = read(fd, &c, sizeof(char))) == sizeof(char) && c != '\n'; n++) {

```
  	buf[n] = c;
```
```
  }
```
```
  buf[n++] = '\n';
```
```
  ini_lineno++;
```
```
  ini_filename = filename;
```

  tmp = zend_parse_ini_string(buf, 1, ZEND_INI_SCANNER_NORMAL, (zend_ini_parser_cb_t)fpm_conf_ini_parser, &error TSRMLS_CC);

```
  ini_filename = filename;
```
```
  if (error || tmp == FAILURE) {
```
```
  	if (ini_include) free(ini_include);
```
```
  	ini_recursion--;
```
```
  	close(fd);
```
```
  	return -1;
```
```
  }
```
```
  if (ini_include) {
```
```
  	char *tmp = ini_include;
```
```
  	ini_include = NULL;
```

  	fpm_evaluate_full_path(&tmp, NULL, NULL, 0);

  	fpm_conf_ini_parser_include(tmp, &error TSRMLS_CC);

```
  	if (error) {
```
```
  		free(tmp);
```

  nb_read = read(fd, buf + pos, sizeof buf - pos);

```
  pos = 0;
```

  while ((newl = strchr(buf + pos, '\n')) != NULL) {

```
  	newl[0] = '\0';
```
```
  	ini_lineno++;
```
```
  	ini_filename = filename;
```

  	tmp = zend_parse_ini_string(buf + pos, 1, ZEND_INI_SCANNER_NORMAL, (zend_ini_parser_cb_t)fpm_conf_ini_parser, &error TSRMLS_CC);

```
  	ini_filename = filename;
```
```
  	if (error || tmp == FAILURE) {
```

  		if (ini_include) free(ini_include);
  		ini_recursion--;
  		close(fd);
  		return -1;
  	}

```
  	free(tmp);
```

```
  	if (ini_include) {
```
```
  		char *tmp = ini_include;
```
```
  		ini_include = NULL;
```

  		fpm_evaluate_full_path(&tmp, NULL, NULL, 0);

  		fpm_conf_ini_parser_include(tmp, &error TSRMLS_CC);

```
  		if (error) {
```
```
  			free(tmp);
```
```
  			ini_recursion--;
```
```
  			close(fd);
```
```
  			return -1;
```
```
  		}
```
```
  		free(tmp);
```
```
  	}
```
```
  	pos = newl - buf + 1;
```
```
  }
```
```
  if (nb_read > 0 && pos == 0) {
```

  	zlog(ZLOG_ERROR, "line %u too long", ini_lineno + 1);

```
  	close(fd);
```
```
  	return -1;
  }
```

  memmove(buf, buf + pos, sizeof buf - pos);

```
  pos = sizeof buf - pos;
```
}

ini_recursion--;