openwrt系统的一些嵌入式设备的监控磁盘支持

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路由器使用 NAND/MTD Flash，而不是 eMMC/SSD，希望能支持下mtdblock

root@GL-BE3600:~$cat /proc/diskstats | awk '$3~/^[hsv]d[a-z]$/{print $3,$6,$10}'
root@GL-BE3600:~$cat /proc/diskstats
   1       0 ram0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
   1       1 ram1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
   1       2 ram2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
   1       3 ram3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
   1       4 ram4 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
   1       5 ram5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
   1       6 ram6 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
   1       7 ram7 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
   1       8 ram8 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
   1       9 ram9 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
   1      10 ram10 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
   1      11 ram11 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
   1      12 ram12 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
   1      13 ram13 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
   1      14 ram14 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
   1      15 ram15 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
   7       0 loop0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
   7       1 loop1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
   7       2 loop2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
   7       3 loop3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
   7       4 loop4 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
   7       5 loop5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
   7       6 loop6 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
   7       7 loop7 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
  31       0 mtdblock0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
  31       1 mtdblock1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
  31       2 mtdblock2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
  31       3 mtdblock3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
  31       4 mtdblock4 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
  31       5 mtdblock5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
  31       6 mtdblock6 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
  31       7 mtdblock7 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
  31       8 mtdblock8 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
  31       9 mtdblock9 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
  31      10 mtdblock10 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
  31      11 mtdblock11 1 0 32 1 0 0 0 0 0 10 0 0 0 0 0
  31      12 mtdblock12 10 0 1024 88 0 0 0 0 0 60 60 0 0 0 0
  31      13 mtdblock13 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
  31      14 mtdblock14 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
  31      15 mtdblock15 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
  31      16 mtdblock16 84 5198 10564 1337 0 0 0 0 0 1390 950 0 0 0 0
  31      17 mtdblock17 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
  31      18 mtdblock18 1182 42576 87516 10290 0 0 0 0 0 15280 6030 0 0 0 0
  31      19 mtdblock19 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

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