Re: [libvirt PATCHv5 15/15] qemu: build vhost-user-fs device command line

Format the 'vhost-user-fs' device on the QEMU command line. This device provides shared file system access using the FUSE protocol carried over virtio. The actual file server is implemented in an external vhost-user-fs device backend process. https://bugzilla.redhat.com/show_bug.cgi?id=1694166 Signed-off-by: Ján Tomko <jtomko(a)redhat.com&gt; Reviewed-by: Daniel P. Berrangé <berrange(a)redhat.com&gt; --- src/qemu/qemu_command.c | 46 +++++++++++++++++- ...vhost-user-fs-fd-memory.x86_64-latest.args | 39 +++++++++++++++ ...vhost-user-fs-hugepages.x86_64-latest.args | 47 +++++++++++++++++++ tests/qemuxml2argvtest.c | 3 ++ 4 files changed, 133 insertions(+), 2 deletions(-) create mode 100644 tests/qemuxml2argvdata/vhost-user-fs-fd-memory.x86_64-latest.args create mode 100644 tests/qemuxml2argvdata/vhost-user-fs-hugepages.x86_64-latest.args diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c index 8ad859ad88..9d215e5e06 100644 --- a/src/qemu/qemu_command.c +++ b/src/qemu/qemu_command.c @@ -2575,6 +2575,46 @@ qemuBuildDisksCommandLine(virCommandPtr cmd, } +static int +qemuBuildVHostUserFsCommandLine(virCommandPtr cmd, + virDomainFSDef *fs, + const virDomainDef *def, + qemuDomainObjPrivatePtr priv) +{ + g_autofree char *chardev_alias = NULL; + g_auto(virBuffer) opt = VIR_BUFFER_INITIALIZER; + + chardev_alias = g_strdup_printf("chr-vu-%s", fs->info.alias); + + virCommandAddArg(cmd, "-chardev"); + virBufferAddLit(&opt, "socket"); + virBufferAsprintf(&opt, ",id=%s", chardev_alias); + virBufferAddLit(&opt, ",path="); + virQEMUBuildBufferEscapeComma(&opt, QEMU_DOMAIN_FS_PRIVATE(fs)->vhostuser_fs_sock);