On 2021/01/29 2:23, Sergei Shtepa wrote: > Hi all, > > I`m ready to suggest the blk_interposer again. > blk_interposer allows to intercept bio requests, remap bio to > another devices or add new bios. > > This version has support from device mapper. > > For the dm-linear device creation command, the `noexcl` parameter > has been added, which allows to open block devices without > FMODE_EXCL mode. It allows to create dm-linear device on a block > device with an already mounted file system. > The new ioctl DM_DEV_REMAP allows to enable and disable bio > interception. > > Thus, it is possible to add the dm-device to the block layer stack > without reconfiguring and rebooting. Please add the changelog here instead of adding it in each patch. And keep the changelog for previous versions too (i.e. v1->v2 in this case) so that the changes overall can be tracked. The proper formatting for the title should be [PATCH v3 X/Y] instead of adding v3 in the title itself. With git format-patch, you can use "-v 3" option to format this for you, or --subject-prefix="PATCH v3" option. > > > Sergei Shtepa (2): > block: blk_interposer > [dm] blk_interposer for dm-linear > > block/bio.c | 2 + > block/blk-core.c | 29 +++ > block/blk-mq.c | 13 ++ > block/genhd.c | 82 ++++++++ > drivers/md/dm-core.h | 46 +++- > drivers/md/dm-ioctl.c | 39 ++++ > drivers/md/dm-linear.c | 17 +- > drivers/md/dm-table.c | 12 +- > drivers/md/dm.c | 383 ++++++++++++++++++++++++++++++++-- > drivers/md/dm.h | 2 +- > include/linux/blk-mq.h | 1 + > include/linux/blk_types.h | 6 +- > include/linux/device-mapper.h | 7 + > include/linux/genhd.h | 19 ++ > include/uapi/linux/dm-ioctl.h | 15 +- > 15 files changed, 643 insertions(+), 30 deletions(-) > -- Damien Le Moal Western Digital Research
