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#include <config.h>
#include <glibtop.h>
#include <glibtop/fsusage.h>
#include <glibtop/error.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 <sys/statvfs.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <errno.h>
#include <mntent.h>
/*
* Linux 2.6.x
* linux/Documentation/iostats.txt
*/
static gboolean
get_device(glibtop* server, const char *mountpoint,
char* device, size_t device_size)
{
const struct mntent *mnt;
FILE *fp;
gboolean found = FALSE;
if (!(fp = setmntent(MOUNTED, "r"))) {
glibtop_warn_io_r(server, "Could not open %s", MOUNTED);
goto out;
}
while ((mnt = getmntent(fp)))
{
/* There can be multiple root mount entries, skip the unuseful one */
if (!strcmp(mnt->mnt_fsname, "rootfs"))
continue;
if (!strcmp(mountpoint, mnt->mnt_dir)) {
if (!strncmp(mnt->mnt_fsname, "/dev/", 5)) {
g_strlcpy(device, mnt->mnt_fsname + 5, device_size);
found = TRUE;
}
break;
}
}
endmntent(fp);
out:
return found;
}
/*
TRUE if device is like "hda3" and then set prefix to "hda".
*/
static gboolean
is_partition(const char* device, char* prefix, size_t prefix_size)
{
g_strlcpy(prefix, device, prefix_size);
for ( ; *prefix; prefix++) {
if (isdigit(*prefix)) {
*prefix = '\0';
return TRUE;
}
}
return FALSE;
}
/*
Bug #539360.
/sys/.../stat format is partially defined in
linux/Documentation/block/stat.txt (looks outdated). Before linux
2.5.25, /sys/block/%s/stat and /sys/block/%s/%s/stat were not the
same, but the following commit changed the latter to have the same
format and broke compatibility.
Commit 34e8beac92c27d292938065f8375842d2840767c
Author: Jerome Marchand <jmarchan@redhat.com>
Date: Fri Feb 8 11:04:55 2008 +0100
Enhanced partition statistics: sysfs
Reports enhanced partition statistics in sysfs.
Signed-off-by: Jerome Marchand <jmarchan@redhat.com>
fs/partitions/check.c | 22 +++++++++++++++++++---
1 files changed, 19 insertions(+), 3 deletions(-)
*/
static void
get_sys_path(glibtop* server, const char *device, char **stat_path, const char **parse_format)
{
const char* linux_2_6_25_format = "%*llu %*llu %llu %*llu"
"%*llu %*llu %llu %*llu";
char prefix[32];
if (is_partition(device, prefix, sizeof prefix)) {
*stat_path = g_strdup_printf("/sys/block/%s/%s/stat",
prefix, device);
if (server->os_version_code < LINUX_VERSION_CODE(2, 6, 25))
*parse_format = "%*llu %llu %*llu %llu";
else
*parse_format = linux_2_6_25_format;
}
else
{
*stat_path = g_strdup_printf("/sys/block/%s/stat", device);
if (server->os_version_code < LINUX_VERSION_CODE(2, 6, 25))
*parse_format = "%*llu %*llu %llu %*llu %*llu %*llu %llu";
else
*parse_format = linux_2_6_25_format;
}
}
static void linux_2_6_0(glibtop *server, glibtop_fsusage *buf, const char *path)
{
char *filename = NULL;
const char *format;
int ret;
char buffer[BUFSIZ];
char device[64];
if (!get_device(server, path, device, sizeof device))
goto out;
get_sys_path(server, device, &filename, &format);
ret = try_file_to_buffer(buffer, sizeof buffer, "%s", filename);
if (ret < 0) goto out;
if (sscanf(buffer, format, &buf->read, &buf->write) != 2) {
glibtop_warn_io_r(server, "Could not parse %s", filename);
goto out;
}
buf->flags |= (1 << GLIBTOP_FSUSAGE_READ) | (1 << GLIBTOP_FSUSAGE_WRITE);
out:
g_free(filename);
}
static void linux_2_4_0(glibtop *server, glibtop_fsusage *buf, const char *path)
{
}
static void
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);
}
}
/* the following comes from sysdeps/common/mountlist.c if copyright matters...
*/
static const unsigned long _glibtop_sysdeps_fsusage =
(1L << GLIBTOP_FSUSAGE_BLOCKS) + (1L << GLIBTOP_FSUSAGE_BFREE)
+ (1L << GLIBTOP_FSUSAGE_BAVAIL) + (1L << GLIBTOP_FSUSAGE_FILES)
+ (1L << GLIBTOP_FSUSAGE_FFREE) + (1L << GLIBTOP_FSUSAGE_BLOCK_SIZE);
void
glibtop_get_fsusage_s(glibtop *server, glibtop_fsusage *buf, const char *path)
{
struct statvfs fsd;
memset(buf, 0, sizeof(glibtop_fsusage));
if (statvfs(path, &fsd) < 0) {
glibtop_warn_r(server, "statvfs '%s' failed: %s", path, strerror (errno));
return;
}
buf->blocks = fsd.f_blocks;
buf->bfree = fsd.f_bfree;
buf->bavail = (fsd.f_bavail > fsd.f_bfree) ? 0 : fsd.f_bavail;
buf->files = fsd.f_files;
buf->ffree = fsd.f_ffree;
buf->block_size = fsd.f_bsize;
buf->flags = _glibtop_sysdeps_fsusage;
/* setting additional flags is delegated */
get_fsusage_read_write(server, buf, path);
}
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