On 17/06/2020 19.23, Kanchan Joshi wrote:
This patchset enables issuing zone-append using aio and io-uring direct-io
interface.
For aio, this introduces opcode IOCB_CMD_ZONE_APPEND. Application uses start LBA
of the zone to issue append. On completion 'res2' field is used to return
zone-relative offset.
For io-uring, this introduces three opcodes:
IORING_OP_ZONE_APPEND/APPENDV/APPENDV_FIXED.
Since io_uring does not have aio-like res2, cqe->flags are repurposed to return
zone-relative offset
Please provide a pointers to applications that are updated and ready to
take advantage of zone append.
I do not believe it's beneficial at this point to change the libaio API,
applications that would want to use this API, should anyway switch to
use io_uring.
Please also note that applications and libraries that want to take
advantage of zone append, can already use the zonefs file-system, as it
will use the zone append command when applicable.
Kanchan Joshi (1):
aio: add support for zone-append
Selvakumar S (2):
fs,block: Introduce IOCB_ZONE_APPEND and direct-io handling
io_uring: add support for zone-append
fs/aio.c | 8 +++++
fs/block_dev.c | 19 +++++++++++-
fs/io_uring.c | 72 +++++++++++++++++++++++++++++++++++++++++--
include/linux/fs.h | 1 +
include/uapi/linux/aio_abi.h | 1 +
include/uapi/linux/io_uring.h | 8 ++++-
6 files changed, 105 insertions(+), 4 deletions(-)
