[v4,0/3] implement direct IO with integrity

Message

Alexander V. Buev Sept. 9, 2022, 12:20 p.m. UTC

This series of patches makes possible to do direct block IO
with integrity payload using io uring kernel interface.
Userspace app can utilize new READV_PI/WRITEV_PI operation with a new
fields in sqe struct (pi_addr/pi_len) to provide iovec's with
integrity data.

Changes since v3:
 - fixed warnings reported by robot 

Changes since v2:
 - separate code from fast path
 - keep rw_pi struct size <= 64 byte
 - using kiocb->private pointer to pass
   PI data iterator to block direct IO layer   
 - improved bio_integrity_add_iovec function 

Alexander V. Buev (3):
  block: bio-integrity: add PI iovec to bio
  block: io-uring: add READV_PI/WRITEV_PI operations
  block: fops: handle IOCB_USE_PI in direct IO

 block/bio-integrity.c         | 163 +++++++++
 block/fops.c                  |  80 +++++
 include/linux/bio.h           |   8 +
 include/linux/fs.h            |   1 +
 include/uapi/linux/io_uring.h |   6 +
 include/uapi/linux/uio.h      |   3 +-
 io_uring/Makefile             |   3 +-
 io_uring/io_uring.c           |   2 +
 io_uring/opdef.c              |  27 ++
 io_uring/rw.h                 |   4 +
 io_uring/rw_pi.c              | 619 ++++++++++++++++++++++++++++++++++
 io_uring/rw_pi.h              |  34 ++
 12 files changed, 948 insertions(+), 2 deletions(-)
 create mode 100644 io_uring/rw_pi.c
 create mode 100644 io_uring/rw_pi.h