> 2023年2月22日 16:53，Andrea Tomassetti <andrea.tomassetti-opensource@xxxxxxxx> 写道： > > When a disk changes size, udev rules are fired and register_bcache > function get called. With this patch, every time this happens, the > disk's capacity get checked: if it has changed then the new > bch_update_capacity function get called, otherwise it fails as before. > > Signed-off-by: Andrea Tomassetti <andrea.tomassetti-opensource@xxxxxxxx> Hi Andrea, Thank you for the update. I will start to do more testing for the patches from you and Zheming. Coly Li > --- > Hi Coly, > this is the second version of the patch. As you correctly pointed out, > I implemented roll-back functionalities in case of error. > I'm testing this funcionality using QEMU/KVM vm via libvirt. > Here the steps: > 1. make-bcache --writeback -B /dev/vdb -C /dev/vdc > 2. mkfs.xfs /dev/bcache0 > 3. mount /dev/bcache0 /mnt > 3. dd if=/dev/random of=/mnt/random0 bs=1M count=1000 > 4. md5sum /mnt/random0 | tee /mnt/random0.md5 > 5. [HOST] virsh blockresize <vm-name> --path <disk-path> --size <new-size> > 6. xfs_growfs /dev/bcache0 > 6. Repeat steps 3 and 4 with a different file name (e.g. random1.md5) > 7. umount/reboot/remount and check that the md5 hashes are correct with > md5sum -c /mnt/random?.md5 > [snipped]
