On Thu, Apr 20, 2023 at 11:40:25PM +0800, Ming Lei wrote: > Hello, > > The 1st 3 patch are cleanup. > > The other patches supports to move data copy between io request pages and > userspace buffer into ublk server(userspace). This way avoids one round trip > of uring command(UBLK_F_NEED_GET_DATA), and solve buffer release issue for > READ. Meantime both sides becomes cleaner. Also it can be thought as > prep patch for supporting zero copy. > > > Ming Lei (7): > ublk: kill queuing request by task_work_add > ublk: cleanup io cmd code path by adding ublk_fill_io() > ublk: cleanup ublk_copy_user_pages > ublk: grab request reference when the request is handled by userspace > ublk: support to copy any part of request pages > ublk: add read()/write() support for ublk char device > ublk: support user copy > > drivers/block/ublk_drv.c | 457 +++++++++++++++++++++++++--------- > include/uapi/linux/ublk_cmd.h | 25 +- > 2 files changed, 361 insertions(+), 121 deletions(-) ublksrv code for supporting user copy(only loop implements it, and easy for others to support it): https://github.com/ming1/ubdsrv/commits/usercopy Thanks, Ming
