You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
177 lines
3.7 KiB
177 lines
3.7 KiB
/*
|
|
* blktrace output analysis: generate a timeline & gather statistics
|
|
*
|
|
* Copyright (C) 2006 Alan D. Brunelle <Alan.Brunelle@hp.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*
|
|
*/
|
|
#include <errno.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
#include <sys/time.h>
|
|
#include <sys/resource.h>
|
|
#include <fcntl.h>
|
|
|
|
#define INLINE_DECLARE
|
|
#include "globals.h"
|
|
|
|
struct file_info {
|
|
struct list_head head;
|
|
FILE *ofp;
|
|
char *oname;
|
|
};
|
|
|
|
struct buf_info {
|
|
struct list_head head;
|
|
void *buf;
|
|
};
|
|
|
|
LIST_HEAD(files_to_clean);
|
|
LIST_HEAD(all_bufs);
|
|
|
|
static void clean_files(void)
|
|
{
|
|
struct list_head *p, *q;
|
|
|
|
list_for_each_safe(p, q, &files_to_clean) {
|
|
struct stat buf;
|
|
struct file_info *fip = list_entry(p, struct file_info, head);
|
|
|
|
fclose(fip->ofp);
|
|
if (!stat(fip->oname, &buf) && (buf.st_size == 0))
|
|
unlink(fip->oname);
|
|
|
|
list_del(&fip->head);
|
|
free(fip->oname);
|
|
free(fip);
|
|
}
|
|
}
|
|
|
|
static void clean_bufs(void)
|
|
{
|
|
struct list_head *p, *q;
|
|
|
|
list_for_each_safe(p, q, &all_bufs) {
|
|
struct buf_info *bip = list_entry(p, struct buf_info, head);
|
|
|
|
list_del(&bip->head);
|
|
free(bip->buf);
|
|
free(bip);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Due to the N(devs) parts of a lot of the output features provided
|
|
* by btt, it will fail opens on large(ish) systems. Here we try to
|
|
* keep bumping our open file limits, and if those fail, we return NULL.
|
|
*
|
|
* Root users will probably be OK with this, others...
|
|
*/
|
|
static int increase_limit(int resource, rlim_t increase)
|
|
{
|
|
struct rlimit rlim;
|
|
int save_errno = errno;
|
|
|
|
if (!getrlimit(resource, &rlim)) {
|
|
rlim.rlim_cur += increase;
|
|
if (rlim.rlim_cur >= rlim.rlim_max)
|
|
rlim.rlim_max = rlim.rlim_cur + increase;
|
|
|
|
if (!setrlimit(resource, &rlim))
|
|
return 1;
|
|
}
|
|
|
|
errno = save_errno;
|
|
return 0;
|
|
}
|
|
|
|
static int handle_open_failure(void)
|
|
{
|
|
if (errno == ENFILE || errno == EMFILE)
|
|
return increase_limit(RLIMIT_NOFILE, 16);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void add_file(FILE *fp, char *oname)
|
|
{
|
|
struct file_info *fip = malloc(sizeof(*fip));
|
|
|
|
fip->ofp = fp;
|
|
fip->oname = oname;
|
|
list_add_tail(&fip->head, &files_to_clean);
|
|
}
|
|
|
|
void add_buf(void *buf)
|
|
{
|
|
struct buf_info *bip = malloc(sizeof(*bip));
|
|
|
|
bip->buf = buf;
|
|
list_add_tail(&bip->head, &all_bufs);
|
|
}
|
|
|
|
void clean_allocs(void)
|
|
{
|
|
clean_files();
|
|
clean_bufs();
|
|
}
|
|
|
|
char *make_dev_hdr(char *pad, size_t len, struct d_info *dip, int add_parens)
|
|
{
|
|
if (dip->devmap)
|
|
snprintf(pad, len, "%s", dip->devmap);
|
|
else if (add_parens)
|
|
snprintf(pad, len, "(%3d,%3d)",
|
|
MAJOR(dip->device), MINOR(dip->device));
|
|
else
|
|
snprintf(pad, len, "%d,%d",
|
|
MAJOR(dip->device), MINOR(dip->device));
|
|
|
|
return pad;
|
|
}
|
|
|
|
char *mkhandle(struct d_info *dip, char *str, size_t len)
|
|
{
|
|
return make_dev_hdr(str, len, dip, 0);
|
|
}
|
|
|
|
FILE *my_fopen(const char *path, const char *mode)
|
|
{
|
|
FILE *fp;
|
|
|
|
do {
|
|
fp = fopen(path, mode);
|
|
} while (fp == NULL && handle_open_failure());
|
|
|
|
return fp;
|
|
}
|
|
|
|
int my_open(const char *path, int flags)
|
|
{
|
|
int fd;
|
|
|
|
do {
|
|
fd = open(path, flags);
|
|
} while (fd < 0 && handle_open_failure());
|
|
|
|
return fd;
|
|
}
|
|
|
|
void dbg_ping(void) {}
|