Hi Jevon,
More findings in fsdev/qemu-fsdev.c and hw/9pfs/Makefile.objs, see below.
Cheers.
--
Greg
On Tue, 15 Mar 2016 00:02:48 +0800
Jevon Qiao <scaleqiao@xxxxxxxxx> wrote:
> Ceph as a promising unified distributed storage system is widely used in the
> world of OpenStack. OpenStack users deploying Ceph for block (Cinder) and
> object (S3/Swift) are unsurprisingly looking at Manila and CephFS to round out
> a unified storage solution. Since the typical hypervisor people are using is
> Qemu/KVM, it is necessary to provide a high performance, easy to use, file
> system service in it. VirtFS aims to offers paravirtualized system services and
> simple passthrough for directories from host to guest, which currently only
> support local file system, this patch wants to add CephFS support in VirtFS.
>
> Signed-off-by: Jevon Qiao <scaleqiao@xxxxxxxxx>
> ---
> configure | 33 ++
> fsdev/qemu-fsdev.c | 1 +
> fsdev/qemu-fsdev.h | 3 +-
> hw/9pfs/9p-cephfs.c | 836 ++++++++++++++++++++++++++++++++++++++
> hw/9pfs/Makefile.objs | 3 +
> scripts/analyse-9p-simpletrace.py | 213 ----------
> scripts/analyze-9p-simpletrace.py | 306 ++++++++++++++
> trace-events | 33 ++
> 8 files changed, 1214 insertions(+), 214 deletions(-)
> create mode 100644 hw/9pfs/9p-cephfs.c
> delete mode 100755 scripts/analyse-9p-simpletrace.py
> create mode 100755 scripts/analyze-9p-simpletrace.py
>
> diff --git a/configure b/configure
> index 0c0472a..c48f1af 100755
> --- a/configure
> +++ b/configure
> @@ -275,6 +275,7 @@ trace_backends="log"
> trace_file="trace"
> spice=""
> rbd=""
> +cephfs=""
> smartcard=""
> libusb=""
> usb_redir=""
> @@ -1019,6 +1020,10 @@ for opt do
> ;;
> --enable-rbd) rbd="yes"
> ;;
> + --disable-cephfs) cephfs="no"
> + ;;
> + --enable-cephfs) cephfs="yes"
> + ;;
> --disable-xfsctl) xfs="no"
> ;;
> --enable-xfsctl) xfs="yes"
> @@ -1345,6 +1350,7 @@ disabled with --disable-FEATURE, default is enabled if available:
> vhost-net vhost-net acceleration support
> spice spice
> rbd rados block device (rbd)
> + cephfs Ceph File System
> libiscsi iscsi support
> libnfs nfs support
> smartcard smartcard support (libcacard)
> @@ -3087,6 +3093,28 @@ EOF
> fi
>
> ##########################################
> +# cephfs probe
> +if test "$cephfs" != "no" ; then
> + cat > $TMPC <<EOF
> +#include <stdio.h>
> +#include <cephfs/libcephfs.h>
> +int main(void) {
> + struct ceph_mount_info *cmount;
> + ceph_create(&cmount, NULL);
> + return 0;
> +}
> +EOF
> + cephfs_libs="-lcephfs"
> + if compile_prog "" "$cephfs_libs" ; then
> + cephfs=yes
> + else
> + if test "$cephfs" = "yes" ; then
> + feature_not_found "cephfs" "Install libcephfs/ceph devel"
> + fi
> + cephfs=no
> + fi
> +fi
> +##########################################
> # libssh2 probe
> min_libssh2_version=1.2.8
> if test "$libssh2" != "no" ; then
> @@ -4760,6 +4788,7 @@ else
> echo "spice support $spice"
> fi
> echo "rbd support $rbd"
> +echo "cephfs support $cephfs"
> echo "xfsctl support $xfs"
> echo "smartcard support $smartcard"
> echo "libusb $libusb"
> @@ -5224,6 +5253,10 @@ if test "$rbd" = "yes" ; then
> echo "RBD_CFLAGS=$rbd_cflags" >> $config_host_mak
> echo "RBD_LIBS=$rbd_libs" >> $config_host_mak
> fi
> +if test "$cephfs" = "yes" ; then
> + echo "CONFIG_CEPHFS=m" >> $config_host_mak
> + echo "CEPHFS_LIBS=$cephfs_libs" >> $config_host_mak
> +fi
>
> echo "CONFIG_COROUTINE_BACKEND=$coroutine" >> $config_host_mak
> if test "$coroutine_pool" = "yes" ; then
> diff --git a/fsdev/qemu-fsdev.c b/fsdev/qemu-fsdev.c
> index bf7f0b0..7f07a2a 100644
> --- a/fsdev/qemu-fsdev.c
> +++ b/fsdev/qemu-fsdev.c
> @@ -27,6 +27,7 @@ static FsDriverTable FsDrivers[] = {
> #endif
> { .name = "synth", .ops = &synth_ops},
> { .name = "proxy", .ops = &proxy_ops},
#ifdef CONFIG_CEPHFS
> + { .name = "cephfs", .ops = &cephfs_ops},
#endif
> };
>
> [...]
> diff --git a/hw/9pfs/Makefile.objs b/hw/9pfs/Makefile.objs
> index da0ae0c..a77a6f4 100644
> --- a/hw/9pfs/Makefile.objs
> +++ b/hw/9pfs/Makefile.objs
> @@ -5,5 +5,8 @@ common-obj-y += coth.o cofs.o codir.o cofile.o
> common-obj-y += coxattr.o 9p-synth.o
> common-obj-$(CONFIG_OPEN_BY_HANDLE) += 9p-handle.o
> common-obj-y += 9p-proxy.o
> +common-obj-y += 9p-cephfs.o
common-obj-$(CONFIG_CEPHFS) += 9p-cephfs.o
>
> obj-y += virtio-9p-device.o
> +
> +9p-cephfs.o-libs := $(CEPHFS_LIBS)
--
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