#include <libcbd.h>

#include <cbdutil.h>

static u64
get_sysfs_value(const char* dirname, const char* filename)
{
    char pathname[PATH_MAX];
    int fd;
    char buf[80];

    sprintf(pathname, "%s/%s", dirname, filename);
    fd = open(pathname, O_RDONLY);
    if (fd < 0) {
        error("Cannot open device\n");
    }
    if (read(fd, buf, sizeof(buf)) < 1) {
        error("Cannot read device\n");
    }
    close(fd);
    return (u64)strtoul(buf, NULL, 10);
}

int
cbd_info(const char* dev, struct cbd_info* info)
{
    char dirname[PATH_MAX];

    sprintf(dirname, "/sys/fs/compress/%s", dev);

    info->lbatpblk_r = get_sysfs_value(dirname, "lbatpblk_r");
    info->lbatpblk_w = get_sysfs_value(dirname, "lbatpblk_w");
    info->lbd_r = get_sysfs_value(dirname, "lbd_r");
    info->lbd_w = get_sysfs_value(dirname, "lbd_w");
    info->lblk_size = get_sysfs_value(dirname, "lblk_size");
    info->lblk_total = get_sysfs_value(dirname, "lblk_total");
    info->lblk_used = get_sysfs_value(dirname, "lblk_used");
    info->pbat_r = get_sysfs_value(dirname, "pbat_r");
    info->pbat_w = get_sysfs_value(dirname, "pbat_w");
    info->pblk_total = get_sysfs_value(dirname, "pblk_total");
    info->pblk_used = get_sysfs_value(dirname, "pblk_used");
    info->zone_init = get_sysfs_value(dirname, "zone_init");
    info->zone_total = get_sysfs_value(dirname, "zone_total");

    return 0;
}