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| author | Stefan Hajnoczi <stefanha@redhat.com> | 2022-10-13 14:58:57 -0400 |
|---|---|---|
| committer | Stefan Hajnoczi <stefanha@redhat.com> | 2022-10-26 14:56:42 -0400 |
| commit | fd66dbd424f5c90fcff3d27afed2c6c59d8be3ac (patch) | |
| tree | 9c18572891ca933ea37438d32b6e26733a6277d5 /scripts | |
| parent | 0421b563ab4d947a388078331c057daa9b979f41 (diff) | |
blkio: add libblkio block driver
libblkio (https://gitlab.com/libblkio/libblkio/) is a library for
high-performance disk I/O. It currently supports io_uring,
virtio-blk-vhost-user, and virtio-blk-vhost-vdpa with additional drivers
under development.
One of the reasons for developing libblkio is that other applications
besides QEMU can use it. This will be particularly useful for
virtio-blk-vhost-user which applications may wish to use for connecting
to qemu-storage-daemon.
libblkio also gives us an opportunity to develop in Rust behind a C API
that is easy to consume from QEMU.
This commit adds io_uring, nvme-io_uring, virtio-blk-vhost-user, and
virtio-blk-vhost-vdpa BlockDrivers to QEMU using libblkio. It will be
easy to add other libblkio drivers since they will share the majority of
code.
For now I/O buffers are copied through bounce buffers if the libblkio
driver requires it. Later commits add an optimization for
pre-registering guest RAM to avoid bounce buffers.
The syntax is:
--blockdev io_uring,node-name=drive0,filename=test.img,readonly=on|off,cache.direct=on|off
--blockdev nvme-io_uring,node-name=drive0,filename=/dev/ng0n1,readonly=on|off,cache.direct=on
--blockdev virtio-blk-vhost-vdpa,node-name=drive0,path=/dev/vdpa...,readonly=on|off,cache.direct=on
--blockdev virtio-blk-vhost-user,node-name=drive0,path=vhost-user-blk.sock,readonly=on|off,cache.direct=on
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Acked-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Message-id: 20221013185908.1297568-3-stefanha@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'scripts')
| -rw-r--r-- | scripts/meson-buildoptions.sh | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/scripts/meson-buildoptions.sh b/scripts/meson-buildoptions.sh index eb3267bef5..2cb0de5601 100644 --- a/scripts/meson-buildoptions.sh +++ b/scripts/meson-buildoptions.sh @@ -67,6 +67,7 @@ meson_options_help() { printf "%s\n" ' auth-pam PAM access control' printf "%s\n" ' avx2 AVX2 optimizations' printf "%s\n" ' avx512f AVX512F optimizations' + printf "%s\n" ' blkio libblkio block device driver' printf "%s\n" ' bochs bochs image format support' printf "%s\n" ' bpf eBPF support' printf "%s\n" ' brlapi brlapi character device driver' @@ -198,6 +199,8 @@ _meson_option_parse() { --disable-gcov) printf "%s" -Db_coverage=false ;; --enable-lto) printf "%s" -Db_lto=true ;; --disable-lto) printf "%s" -Db_lto=false ;; + --enable-blkio) printf "%s" -Dblkio=enabled ;; + --disable-blkio) printf "%s" -Dblkio=disabled ;; --block-drv-ro-whitelist=*) quote_sh "-Dblock_drv_ro_whitelist=$2" ;; --block-drv-rw-whitelist=*) quote_sh "-Dblock_drv_rw_whitelist=$2" ;; --enable-block-drv-whitelist-in-tools) printf "%s" -Dblock_drv_whitelist_in_tools=true ;; |