Red Hat Bugzilla – Bug 889051
Commands "__com.redhat_drive_add/del" don' t exist in RHEL7.0
Last modified: 2014-06-17 23:19:40 EDT
Description of problem: Can not find "__com.redhat_drive_add/del" commands in HMP and QMP On RHEL7.0. On RHEL6.4, if you want to hotadd/remove block, you need to use the "__com.redhat_drive_add & device_add" and "device_del&__com.redhat_drive_del", I tried to use hotadd/remove a disk by using rhelm3.1 and monitored the command. 2012-12-19 11:18:32.842+0000: 25440: debug : qemuMonitorIOWrite:461 : QEMU_MONITOR_IO_WRITE: mon=0x7f4f54000bc0 buf={"execute":"device_add","arguments":{"driver":"virtio-blk-pci","scsi":"off","bus":"pci.0","addr":"0x8","drive":"drive-virtio-disk2","id":"virtio-disk2"},"id":"libvirt-215"} 2012-12-19 11:18:32.798+0000: 25440: debug : qemuMonitorIOWrite:461 : QEMU_MONITOR_IO_WRITE: mon=0x7f4f54000bc0 buf={"execute":"__com.redhat_drive_add","arguments":{"file":"/rhev/data-center/2a58c701-8bab-4613-8b33-2d8c862f7355/a6fb82ba-8ed1-4665-aa18-6c683e6e5344/images/a23772e7-f9ab-423b-80e6-b977fbaf29de/5e224589-c347-4c31-b431-169967065f69","id":"drive-virtio-disk2","format":"qcow2","serial":"a23 772e7-f9ab-423b-80e6-b977fbaf29de","cache":"none","werror":"stop","rerror":"stop","aio":"native"},"id":"libvirt-214"} 2012-12-19 11:18:16.145+0000: 25440: debug : qemuMonitorIOWrite:461 : QEMU_MONITOR_IO_WRITE: mon=0x7f4f54000bc0 buf={"execute":"device_del","arguments":{"id":"virtio-disk1"},"id":"libvirt-180"} <chayang> 2012-12-19 11:18:16.149+0000: 25443: debug : qemuMonitorSend:903 : QEMU_MONITOR_SEND_MSG: mon=0x7f4f54000bc0 msg={"execute":"__com.redhat_drive_del","arguments":{"id":"drive-virtio-disk1"},"id":"libvirt-181"} Currently, if qemu-kvm on RHEL7 do not have __com.redhat_drive_add/del, seems the rhelm can not use this function. Version-Release number of selected component (if applicable): Host Kernel #uname -r 3.6.0-0.29.el7.x86_64 qemu-kvm version qemu-kvm-1.2.0-20.el7.x86_64 How reproducible: 100% Steps to Reproduce: 1.Boot guest #/usr/libexec/qemu-kvm -cpu Opteron_G3 -m 2048 -smp 2,sockets=1,cores=2,threads=1 -enable-kvm -name rhel64 -smbios type=1,manufacturer='Red Hat',product='RHEV Hypervisor',version=el6,serial=koTUXQrb,uuid=feebc8fd-f8b0-4e75-abc3-e63fcdb67171 -k en-us -rtc base=localtime,clock=host,driftfix=slew -monitor stdio -qmp tcp:0:5555,server,nowait -boot menu=on -bios /usr/share/seabios/bios.bin -drive file=/home/rhel6u4_mazhang.qcow2,if=none,id=drive-scsi-disk,format=qcow2,cache=none,werror=stop,rerror=stop -device virtio-scsi-pci,id=scsi0,addr=0x5 -device scsi-disk,drive=drive-scsi-disk,bus=scsi0.0,scsi-id=0,lun=0,id=scsi-disk,bootindex=1 -netdev tap,id=hostnet0,downscript=no -device e1000,netdev=hostnet0,id=net0,mac=00:1a:4a:2e:28:1b,bus=pci.0,addr=0x4,bootindex=2 -chardev socket,path=/tmp/isa-serial1,server,nowait,id=isa1 -device isa-serial,chardev=isa1,id=isa-serial1 -vnc :9 -drive file=/root/zhangjunyi/virtio_12G.qcow2,format=qcow2,if=none,id=ide1,cache=none,werror=stop,rerror=stop -device ide-drive,drive=ide1,id=ide2 -device sga 2. Can not find the __com.redhat_drive_add/del commands via HMP and QMP, can find drive_add. #(qemu) ? ... #{"execute":"query-commands"} {"return": [{"name": "query-target"}, {"name": "query-cpu-definitions"}, {"name": "query-machines"}, {"name": "device-list-properties"}, {"name": "qom-list-types"}, {"name": "change-vnc-password"}, {"name": "qom-get"}, {"name": "qom-set"}, {"name": "qom-list"}, {"name": "query-block-jobs"}, {"name": "query-balloon"}, {"name": "query-migrate-capabilities"}, {"name": "migrate-set-capabilities"}, {"name": "query-migrate"}, {"name": "query-uuid"}, {"name": "query-name"}, {"name": "query-spice"}, {"name": "query-vnc"}, {"name": "query-mice"}, {"name": "query-status"}, {"name": "query-kvm"}, {"name": "query-pci"}, {"name": "query-cpus"}, {"name": "query-blockstats"}, {"name": "query-block"}, {"name": "query-chardev"}, {"name": "query-events"}, {"name": "query-commands"}, {"name": "query-version"}, {"name": "human-monitor-command"}, {"name": "qmp_capabilities"}, {"name": "add_client"}, {"name": "expire_password"}, {"name": "set_password"}, {"name": "block_set_io_throttle"}, {"name": "block_passwd"}, {"name": "query-fdsets"}, {"name": "remove-fd"}, {"name": "add-fd"}, {"name": "closefd"}, {"name": "getfd"}, {"name": "set_link"}, {"name": "balloon"}, {"name": "blockdev-snapshot-sync"}, {"name": "transaction"}, {"name": "block-job-cancel"}, {"name": "block-job-set-speed"}, {"name": "block-stream"}, {"name": "block_resize"}, {"name": "netdev_del"}, {"name": "netdev_add"}, {"name": "dump-guest-memory"}, {"name": "client_migrate_info"}, {"name": "migrate_set_downtime"}, {"name": "migrate_set_speed"}, {"name": "query-migrate-cache-size"}, {"name": "migrate-set-cache-size"}, {"name": "migrate_cancel"}, {"name": "migrate"}, {"name": "xen-save-devices-state"}, {"name": "inject-nmi"}, {"name": "pmemsave"}, {"name": "memsave"}, {"name": "cpu"}, {"name": "device_del"}, {"name": "device_add"}, {"name": "system_powerdown"}, {"name": "system_reset"}, {"name": "system_wakeup"}, {"name": "cont"}, {"name": "stop"}, {"name": "screendump"}, {"name": "change"}, {"name": "eject"}, {"name": "quit"}]} Actual results: Can not find "__com.redhat_drive_add/del" commands in HMP and QMP On RHEL7.0 Expected results: Should have "__com.redhat_drive_add/del" commands, since the rhelm execute the hot plug/unplug disk by issuing the command "{"execute":"device_add","arguments":{"driver":"virtio-blk-pci","scsi":"off","bus":"pci.0","addr":"0x8","drive":"drive-virtio-disk2","id":"virtio-disk2"} & {"execute":"__com.redhat_drive_add","arguments":{"file":"/rhev/data-center/2a58c701-8bab-4613-8b33-2d8c862f7355/a6fb82ba-8ed1-4665-aa18-6c683e6e5344/images/a23772e7-f9ab-423b-80e6-b977fbaf29de/5e224589-c347-4c31-b431-169967065f69","id":"drive-virtio-disk2","format":"qcow2","serial":"a23 772e7-f9ab-423b-80e6-b977fbaf29de","cache":"none","werror":"stop","rerror":"stop","aio":"native"},"id":"libvirt-214"}" Additional info: 1. I tried to use hotadd/remove a disk by using rhelm3.1 and monitored the command. The rhelm3.1 call __com.redhat_drive_add/del commands. 2. I am not sure the commands are called by rhelm will keep the as same as RHEL6.4. I filed this bug according to RHEL6.4 rules. Please free to close this bug if RHEL7.0 will use the combination(drive_add & device_add) instead of the combination ("__com.redhat_drive_add & device_add").
Additional info: 3. I tested latest upstream(qemu1.3), hit the same issue.
You're right that the commands don't exist in RHEL7.0 and upstream. Those commands (and any commands starting with __com.redhat_) are Red Hat specific commands and exist only in RHEL6.4. IIRC, the upstream solution is/was to have new block commands for that, which were/are being worked on by Markus. Either, we get the replacement commands merged upstream in time for RHEL-7.0 or we'll have to forward port the RHEL6 ones to RHEL-7.0. Re-assigning to Markus, as (if my memory isn't failing me) he was the person who worked on the __com.redhat_drive_add/del commands.
*** Bug 907290 has been marked as a duplicate of this bug. ***
After adding __com.redhat_drive_add command, drive_add command should be disabled as we will use downstream version instead of upstream one.
*** Bug 1032388 has been marked as a duplicate of this bug. ***
Hi Markus, Could you help see comment #7, this lack of __com.redhat_drive_add/del effect our hotpluging functional testing and bug 1032388 was duplicated to this one, so could you help to fixed this bug soon ? Thanks in advance. Best Regards, sluo
I hope to post my patch today.
Reproduce this bus as follow version: Host: qemu-kvm-1.5.3-21.el7.x86_64 Guest:rhel7 Steps: 1.Boot guest with "/usr/libexec/qemu-kvm -qmp tcp:0:4445,server,nowait....." 2.Host: telnet 10.66.106.21 4445 Trying 10.66.106.21... Connected to 10.66.106.21. Escape character is '^]'. {"QMP": {"version": {"qemu": {"micro": 3, "minor": 5, "major": 1}, "package": " (qemu-kvm-1.5.3-21.el7)"}, "capabilities": []}} {"execute":"qmp_capabilities"} {"return": {}} {"execute":"query-commands"} Results: can't found "__com.redhat_drive_add/del" commands Verify this bug as follow version: Host: qemu-kvm-1.5.3-30.el7.x86_64 Steps as same as reproduce Results: {"execute":"query-commands"} {"return": [{"name": "query-rx-filter"}, {"name": "blockdev-add"}, {"name": "chardev-remove"}, {"name": "chardev-add"}, {"name": "query-tpm-types"}, {"name": "query-tpm-models"}, {"name": "query-tpm"}, {"name": "query-target"}, {"name": "query-cpu-definitions"}, {"name": "query-machines"}, {"name": "device-list-properties"}, {"name": "qom-list-types"}, {"name": "change-vnc-password"}, {"name": "nbd-server-stop"}, {"name": "nbd-server-add"}, {"name": "nbd-server-start"}, {"name": "qom-get"}, {"name": "qom-set"}, {"name": "qom-list"}, {"name": "query-block-jobs"}, {"name": "query-balloon"}, {"name": "query-migrate-capabilities"}, {"name": "migrate-set-capabilities"}, {"name": "query-migrate"}, {"name": "query-command-line-options"}, {"name": "query-uuid"}, {"name": "query-name"}, {"name": "query-spice"}, {"name": "query-vnc"}, {"name": "query-mice"}, {"name": "query-status"}, {"name": "query-kvm"}, {"name": "query-pci"}, {"name": "query-cpus"}, {"name": "query-blockstats"}, {"name": "query-block"}, {"name": "query-chardev"}, {"name": "query-events"}, {"name": "query-commands"}, {"name": "query-version"}, {"name": "human-monitor-command"}, {"name": "qmp_capabilities"}, {"name": "add_client"}, {"name": "expire_password"}, {"name": "set_password"}, {"name": "block_set_io_throttle"}, {"name": "block_passwd"}, {"name": "query-fdsets"}, {"name": "remove-fd"}, {"name": "add-fd"}, {"name": "closefd"}, {"name": "getfd"}, {"name": "set_link"}, {"name": "balloon"}, {"name": "block-job-complete"}, {"name": "block-job-resume"}, {"name": "block-job-pause"}, {"name": "block-job-cancel"}, {"name": "block-job-set-speed"}, {"name": "block_resize"}, {"name": "netdev_del"}, {"name": "netdev_add"}, {"name": "dump-guest-memory"}, {"name": "client_migrate_info"}, {"name": "migrate_set_downtime"}, {"name": "migrate_set_speed"}, {"name": "query-migrate-cache-size"}, {"name": "migrate-set-cache-size"}, {"name": "migrate_cancel"}, {"name": "migrate"}, {"name": "xen-set-global-dirty-log"}, {"name": "xen-save-devices-state"}, {"name": "ringbuf-read"}, {"name": "ringbuf-write"}, {"name": "inject-nmi"}, {"name": "pmemsave"}, {"name": "memsave"}, {"name": "cpu-add"}, {"name": "cpu"}, {"name": "send-key"}, {"name": "device_del"}, {"name": "device_add"}, {"name": "system_powerdown"}, {"name": "system_reset"}, {"name": "system_wakeup"}, {"name": "cont"}, {"name": "stop"}, {"name": "__com.redhat_qxl_screendump"}, {"name": "screendump"}, {"name": "change"}, {"name": "__com.redhat_drive_del"}, {"name": "__com.redhat_drive_add"}, {"name": "eject"}, {"name": "quit"}]} Can found commands "__com.redhat_drive_add/del" Addtional info: 1)Try add/del blk ... { "execute": "__com.redhat_drive_add", "arguments": { "id": "drive1","file":"/home/disk01.img","format":"qcow2"} } {"return": {}} { "execute": "device_add", "arguments": { "driver": "virtio-blk-pci","drive":"drive1","id": "virtio-blk-pci1" } } {"return": {}} { "execute": "__com.redhat_drive_del", "arguments": { "id": "drive1" } } {"return": {}} the command work well According to above test,this bug has been fixed.
This request was resolved in Red Hat Enterprise Linux 7.0. Contact your manager or support representative in case you have further questions about the request.