Hi,
it seems BLKRRPART does not return EBUSY although the whole-disk
device contains mounted partitions. It seems like regression,
or what did I overlook?
BLKRRPART is very old way how fdisk-like programs detect that the
whole-disk device is not used by system, otherwise it warns users. Now
it does not work ;-(
Yes, it would be probably better to use open(O_EXCL) in these days.
# lsblk /dev/sda
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 223.6G 0 disk
├─sda1 8:1 0 200M 0 part /boot/efi
├─sda2 8:2 0 5G 0 part /boot
├─sda3 8:3 0 125.5G 0 part
├─sda4 8:4 0 50G 0 part /
└─sda5 8:5 0 42.9G 0 part /home/archive
# strace -e ioctl blockdev --rereadpt /dev/sda
ioctl(3, BLKRRPART) = 0
# uname -r
5.11.10-200.fc33.x86_64
Karel
--
Karel Zak <kzak@xxxxxxxxxx>
http://karelzak.blogspot.com
