It is a common requirement for virtual machine to send persistent reservations, but this currently requires either running QEMU with CAP_SYS_RAWIO, or using out-of-tree patches that let an unprivileged QEMU bypass Linux's filter on SG_IO commands. As an alternative mechanism, the next patches will introduce a privileged helper to run persistent reservation commands without expanding QEMU's attack surface unnecessarily. The helper is invoked through a "pr-manager" QOM object, to which file-posix.c passes SG_IO requests for PERSISTENT RESERVE OUT and PERSISTENT RESERVE IN commands. For example: $ qemu-system-x86_64 -device virtio-scsi \ -object pr-manager-helper,id=helper0,path=/var/run/qemu-pr-helper.sock -drive if=none,id=hd,driver=raw,file.filename=/dev/sdb,file.pr-manager=helper0 -device scsi-block,drive=hd or: $ qemu-system-x86_64 -device virtio-scsi \ -object pr-manager-helper,id=helper0,path=/var/run/qemu-pr-helper.sock -blockdev node-name=hd,driver=raw,file.driver=host_device,file.filename=/dev/sdb,file.pr-manager=helper0 -device scsi-block,drive=hd Multiple pr-manager implementations are conceivable and possible, though only one is implemented right now. For example, a pr-manager could: - talk directly to the multipath daemon from a privileged QEMU (i.e. QEMU links to libmpathpersist); this makes reservation work properly with multipath, but still requires CAP_SYS_RAWIO - use the Linux IOC_PR_* ioctls (they require CAP_SYS_ADMIN though) - more interestingly, implement reservations directly in QEMU through file system locks or a shared database (e.g. sqlite) Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
183 lines
5.7 KiB
Makefile
183 lines
5.7 KiB
Makefile
#######################################################################
|
|
# Common libraries for tools and emulators
|
|
stub-obj-y = stubs/ crypto/
|
|
util-obj-y = util/ qobject/ qapi/
|
|
util-obj-y += qmp-introspect.o qapi-types.o qapi-visit.o qapi-event.o
|
|
|
|
chardev-obj-y = chardev/
|
|
|
|
#######################################################################
|
|
# block-obj-y is code used by both qemu system emulation and qemu-img
|
|
|
|
block-obj-y += nbd/
|
|
block-obj-y += block.o blockjob.o
|
|
block-obj-y += block/ scsi/
|
|
block-obj-y += qemu-io-cmds.o
|
|
block-obj-$(CONFIG_REPLICATION) += replication.o
|
|
|
|
block-obj-m = block/
|
|
|
|
#######################################################################
|
|
# crypto-obj-y is code used by both qemu system emulation and qemu-img
|
|
|
|
crypto-obj-y = crypto/
|
|
crypto-aes-obj-y = crypto/
|
|
|
|
#######################################################################
|
|
# qom-obj-y is code used by both qemu system emulation and qemu-img
|
|
|
|
qom-obj-y = qom/
|
|
|
|
#######################################################################
|
|
# io-obj-y is code used by both qemu system emulation and qemu-img
|
|
|
|
io-obj-y = io/
|
|
|
|
######################################################################
|
|
# Target independent part of system emulation. The long term path is to
|
|
# suppress *all* target specific code in case of system emulation, i.e. a
|
|
# single QEMU executable should support all CPUs and machines.
|
|
|
|
ifeq ($(CONFIG_SOFTMMU),y)
|
|
common-obj-y = blockdev.o blockdev-nbd.o block/
|
|
common-obj-y += bootdevice.o iothread.o
|
|
common-obj-y += net/
|
|
common-obj-y += qdev-monitor.o device-hotplug.o
|
|
common-obj-$(CONFIG_WIN32) += os-win32.o
|
|
common-obj-$(CONFIG_POSIX) += os-posix.o
|
|
|
|
common-obj-$(CONFIG_LINUX) += fsdev/
|
|
|
|
common-obj-y += migration/
|
|
|
|
common-obj-y += audio/
|
|
common-obj-y += hw/
|
|
|
|
common-obj-y += replay/
|
|
|
|
common-obj-y += ui/
|
|
common-obj-y += bt-host.o bt-vhci.o
|
|
bt-host.o-cflags := $(BLUEZ_CFLAGS)
|
|
|
|
common-obj-y += dma-helpers.o
|
|
common-obj-y += vl.o
|
|
vl.o-cflags := $(GPROF_CFLAGS) $(SDL_CFLAGS)
|
|
common-obj-y += tpm.o
|
|
|
|
common-obj-$(CONFIG_SLIRP) += slirp/
|
|
|
|
common-obj-y += backends/
|
|
common-obj-y += chardev/
|
|
|
|
common-obj-$(CONFIG_SECCOMP) += qemu-seccomp.o
|
|
qemu-seccomp.o-cflags := $(SECCOMP_CFLAGS)
|
|
qemu-seccomp.o-libs := $(SECCOMP_LIBS)
|
|
|
|
common-obj-$(CONFIG_FDT) += device_tree.o
|
|
|
|
######################################################################
|
|
# qapi
|
|
|
|
common-obj-y += qmp-marshal.o
|
|
common-obj-y += qmp-introspect.o
|
|
common-obj-y += qmp.o hmp.o
|
|
endif
|
|
|
|
#######################################################################
|
|
# Target-independent parts used in system and user emulation
|
|
common-obj-y += cpus-common.o
|
|
common-obj-y += hw/
|
|
common-obj-y += qom/
|
|
common-obj-y += disas/
|
|
|
|
######################################################################
|
|
# Resource file for Windows executables
|
|
version-obj-$(CONFIG_WIN32) += $(BUILD_DIR)/version.o
|
|
|
|
######################################################################
|
|
# tracing
|
|
util-obj-y += trace/
|
|
target-obj-y += trace/
|
|
|
|
######################################################################
|
|
# guest agent
|
|
|
|
# FIXME: a few definitions from qapi-types.o/qapi-visit.o are needed
|
|
# by libqemuutil.a. These should be moved to a separate .json schema.
|
|
qga-obj-y = qga/
|
|
qga-vss-dll-obj-y = qga/
|
|
|
|
######################################################################
|
|
# contrib
|
|
ivshmem-client-obj-$(CONFIG_IVSHMEM) = contrib/ivshmem-client/
|
|
ivshmem-server-obj-$(CONFIG_IVSHMEM) = contrib/ivshmem-server/
|
|
libvhost-user-obj-y = contrib/libvhost-user/
|
|
vhost-user-scsi.o-cflags := $(LIBISCSI_CFLAGS)
|
|
vhost-user-scsi.o-libs := $(LIBISCSI_LIBS)
|
|
vhost-user-scsi-obj-y = contrib/vhost-user-scsi/
|
|
vhost-user-scsi-obj-y += contrib/libvhost-user/libvhost-user.o
|
|
|
|
######################################################################
|
|
trace-events-subdirs =
|
|
trace-events-subdirs += util
|
|
trace-events-subdirs += crypto
|
|
trace-events-subdirs += io
|
|
trace-events-subdirs += migration
|
|
trace-events-subdirs += block
|
|
trace-events-subdirs += chardev
|
|
trace-events-subdirs += hw/block
|
|
trace-events-subdirs += hw/block/dataplane
|
|
trace-events-subdirs += hw/char
|
|
trace-events-subdirs += hw/intc
|
|
trace-events-subdirs += hw/net
|
|
trace-events-subdirs += hw/virtio
|
|
trace-events-subdirs += hw/audio
|
|
trace-events-subdirs += hw/misc
|
|
trace-events-subdirs += hw/usb
|
|
trace-events-subdirs += hw/scsi
|
|
trace-events-subdirs += hw/nvram
|
|
trace-events-subdirs += hw/display
|
|
trace-events-subdirs += hw/input
|
|
trace-events-subdirs += hw/timer
|
|
trace-events-subdirs += hw/dma
|
|
trace-events-subdirs += hw/sparc
|
|
trace-events-subdirs += hw/sd
|
|
trace-events-subdirs += hw/isa
|
|
trace-events-subdirs += hw/mem
|
|
trace-events-subdirs += hw/i386
|
|
trace-events-subdirs += hw/i386/xen
|
|
trace-events-subdirs += hw/9pfs
|
|
trace-events-subdirs += hw/ppc
|
|
trace-events-subdirs += hw/pci
|
|
trace-events-subdirs += hw/s390x
|
|
trace-events-subdirs += hw/vfio
|
|
trace-events-subdirs += hw/acpi
|
|
trace-events-subdirs += hw/arm
|
|
trace-events-subdirs += hw/alpha
|
|
trace-events-subdirs += hw/xen
|
|
trace-events-subdirs += hw/ide
|
|
trace-events-subdirs += ui
|
|
trace-events-subdirs += audio
|
|
trace-events-subdirs += net
|
|
trace-events-subdirs += target/arm
|
|
trace-events-subdirs += target/i386
|
|
trace-events-subdirs += target/mips
|
|
trace-events-subdirs += target/sparc
|
|
trace-events-subdirs += target/s390x
|
|
trace-events-subdirs += target/ppc
|
|
trace-events-subdirs += qom
|
|
trace-events-subdirs += linux-user
|
|
trace-events-subdirs += qapi
|
|
trace-events-subdirs += accel/tcg
|
|
trace-events-subdirs += accel/kvm
|
|
trace-events-subdirs += nbd
|
|
trace-events-subdirs += scsi
|
|
|
|
trace-events-files = $(SRC_PATH)/trace-events $(trace-events-subdirs:%=$(SRC_PATH)/%/trace-events)
|
|
|
|
trace-obj-y = trace-root.o
|
|
trace-obj-y += $(trace-events-subdirs:%=%/trace.o)
|
|
trace-obj-$(CONFIG_TRACE_UST) += trace-ust-all.o
|
|
trace-obj-$(CONFIG_TRACE_DTRACE) += trace-dtrace-root.o
|
|
trace-obj-$(CONFIG_TRACE_DTRACE) += $(trace-events-subdirs:%=%/trace-dtrace.o)
|