/*
***************************************************************************
* Read stats from the sysfs filesystem for the devices entered on the
* command line.
*
* IN:
* @curr Index in array for current sample statistics.
***************************************************************************
*/
void read_sysfs_dlist_stat(int curr)
{
int dev, ok;
char filename[MAX_PF_NAME];
char *slash;
struct io_dlist *st_dev_list_i;
/* Every I/O device (or partition) is potentially unregistered */
set_entries_unregistered(iodev_nr, st_hdr_iodev);
for (dev = 0; dev < dlist_idx; dev++) {
st_dev_list_i = st_dev_list + dev;
/* Some devices may have a slash in their name (eg. cciss/c0d0...) */
while ((slash = strchr(st_dev_list_i->dev_name, '/'))) {
*slash = '!';
}
snprintf(filename, MAX_PF_NAME, "%s/%s/%s",
SYSFS_BLOCK, st_dev_list_i->dev_name, S_STAT);
filename[MAX_PF_NAME - 1] = '\0';
/* Read device stats */
ok = read_sysfs_file_stat(curr, filename, st_dev_list_i->dev_name);
if (ok && st_dev_list_i->disp_part) {
/* Also read stats for its partitions */
read_sysfs_dlist_part_stat(curr, st_dev_list_i->dev_name);
}
}
/* Free structures corresponding to unregistered devices */
free_unregistered_entries(iodev_nr, st_hdr_iodev);
}
/*
***************************************************************************
* Read stats from the sysfs filesystem
* for the devices entered on the command line
***************************************************************************
*/
void read_sysfs_dlist_stat(int curr, int flags)
{
int dev, ok;
char filename[MAX_PF_NAME];
struct io_dlist *st_dev_list_i;
/* Every I/O device (or partition) is potentially unregistered */
set_entries_inactive(iodev_nr);
for (dev = 0; dev < dlist_idx; dev++) {
st_dev_list_i = st_dev_list + dev;
sprintf(filename, "%s/%s/%s",
SYSFS_BLOCK, st_dev_list_i->dev_name, S_STAT);
/* Read device stats */
ok = read_sysfs_file_stat(curr, filename, st_dev_list_i->dev_name, DT_DEVICE);
if (ok && st_dev_list_i->disp_part)
/* Also read stats for its partitions */
read_sysfs_dlist_part_stat(curr, st_dev_list_i->dev_name);
}
/* Free structures corresponding to unregistered devices */
free_inactive_entries(iodev_nr);
}
/*
***************************************************************************
* Read stats from the sysfs filesystem for every block devices found.
*
* IN:
* @curr Index in array for current sample statistics.
***************************************************************************
*/
void read_sysfs_stat(int curr)
{
DIR *dir;
struct dirent *drd;
char filename[MAX_PF_NAME];
int ok;
/* Every I/O device entry is potentially unregistered */
set_entries_unregistered(iodev_nr, st_hdr_iodev);
/* Open /sys/block directory */
if ((dir = opendir(SYSFS_BLOCK)) != NULL) {
/* Get current entry */
while ((drd = readdir(dir)) != NULL) {
if (!strcmp(drd->d_name, ".") || !strcmp(drd->d_name, ".."))
continue;
snprintf(filename, MAX_PF_NAME, "%s/%s/%s",
SYSFS_BLOCK, drd->d_name, S_STAT);
filename[MAX_PF_NAME - 1] = '\0';
/* If current entry is a directory, try to read its stat file */
ok = read_sysfs_file_stat(curr, filename, drd->d_name);
/*
* If '-p ALL' was entered on the command line,
* also try to read stats for its partitions
*/
if (ok && DISPLAY_PART_ALL(flags)) {
read_sysfs_dlist_part_stat(curr, drd->d_name);
}
}
/* Close /sys/block directory */
closedir(dir);
}
/* Free structures corresponding to unregistered devices */
free_unregistered_entries(iodev_nr, st_hdr_iodev);
}
