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#include <config.h>
#include <glibtop.h>
#include <glibtop/fsusage.h>
#include "glibtop_private.h"
#include <glib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <linux/kdev_t.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
void
_glibtop_linux_get_fsusage_read_write(glibtop *server,
glibtop_fsusage *buf,
const char *path) G_GNUC_INTERNAL;
/*
* Linux 2.6.x
* linux/Documentation/iostats.txt
*/
static char *
get_partition(const char *mountpoint)
{
FILE *partitions;
char *name = NULL;
char line[1024];
struct stat statb;
if(stat(mountpoint, &statb) == -1)
return NULL;
if((partitions = fopen("/proc/partitions", "r")) == NULL)
return NULL;
while(fgets(line, sizeof line, partitions))
{
unsigned major, minor;
char dev[32];
if(sscanf(line, "%u %u %*u %31s", &major, &minor, dev) != 3)
continue;
if(MKDEV(major, minor) != statb.st_dev)
continue;
name = g_strdup(dev);
break;
}
fclose(partitions);
return name;
}
static void
get_sys_path(const char *device, char **stat_path, const char **parse_format)
{
if(g_str_has_prefix(device, "hd") || g_str_has_prefix(device, "sd"))
{
char *prefix;
char *path;
size_t offset;
offset = strcspn(device, "0123456789");
prefix = g_strdup(device);
prefix [offset] = '\0';
path = g_strdup_printf("/sys/block/%s/%s/stat",
prefix, device);
g_free(prefix);
*stat_path = path;
*parse_format = "%*llu %llu %*llu %llu";
}
else
{
*stat_path = g_strdup_printf("/sys/block/%s/stat", device);
*parse_format = "%*llu %*llu %llu %*llu %*llu %*llu %llu";
}
}
static void linux_2_6_0(glibtop *server, glibtop_fsusage *buf, const char *path)
{
char *device;
char *filename;
const char *format;
int ret;
char buffer[BUFSIZ];
device = get_partition(path);
if(!device) return;
get_sys_path(device, &filename, &format);
g_free(device);
ret = try_file_to_buffer(buffer, filename);
if(ret < 0) return;
if (sscanf(buffer, format, &buf->read, &buf->write) != 2) {
glibtop_warn_io_r(server, "Could not parse %s", filename);
return;
}
g_free(filename);
buf->flags |= (1 << GLIBTOP_FSUSAGE_READ) | (1 << GLIBTOP_FSUSAGE_WRITE);
}
static void linux_2_4_0(glibtop *server, glibtop_fsusage *buf, const char *path)
{
}
void G_GNUC_INTERNAL
_glibtop_linux_get_fsusage_read_write(glibtop *server,
glibtop_fsusage *buf,
const char *path)
{
if(server->os_version_code >= LINUX_VERSION_CODE(2, 6, 0))
{
linux_2_6_0(server, buf, path);
}
else if(server->os_version_code >= LINUX_VERSION_CODE(2, 4, 0))
{
linux_2_4_0(server, buf, path);
}
}
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