- /* read reads and writes from all disks (minor = 0), including cd-roms
- * and floppies, and sum them up */
- while (!feof(fp)) {
- fgets(buf, 512, fp);
- col_count = sscanf(buf, "%u %u %s %*u %*u %u %*u %*u %*u %u", &major,
- &minor, devbuf, &reads, &writes);
- /* ignore subdevices (they have only 3 matching entries in their line)
- * and virtual devices (LVM, network block devices, RAM disks, Loopback)
- *
- * XXX: ignore devices which are part of a SW RAID (MD_MAJOR) */
- if (col_count == 5 && major != LVM_BLK_MAJOR && major != NBD_MAJOR
- && major != RAMDISK_MAJOR && major != LOOP_MAJOR) {
- current += reads + writes;
- current_read += reads;
- current_write += writes;
- } else {
- col_count = sscanf(buf, "%u %u %s %*u %u %*u %u",
- &major, &minor, devbuf, &reads, &writes);
- if (col_count != 5) {
- continue;
- }
- }
- for (i = 0; i < MAX_DISKIO_STATS; i++) {
- if (diskio_stats[i].dev &&
- strncmp(devbuf, diskio_stats[i].dev, text_buffer_size) == 0) {
- diskio_stats[i].current =
- (reads + writes - diskio_stats[i].last) / 2;
- diskio_stats[i].current_read =
- (reads - diskio_stats[i].last_read) / 2;
- diskio_stats[i].current_write =
- (writes - diskio_stats[i].last_write) / 2;
- if (reads + writes < diskio_stats[i].last) {
- diskio_stats[i].current = 0;
- }
- if (reads < diskio_stats[i].last_read) {
- diskio_stats[i].current_read = 0;
- diskio_stats[i].current = diskio_stats[i].current_write;
- }
- if (writes < diskio_stats[i].last_write) {
- diskio_stats[i].current_write = 0;
- diskio_stats[i].current = diskio_stats[i].current_read;
- }
- diskio_stats[i].last = reads + writes;
- diskio_stats[i].last_read = reads;
- diskio_stats[i].last_write = writes;
- }
- }
- }