Re: [libvirt] [PATCH 2/2] qemu: Don't fail if the SCSI host device is shareable between domains

--- src/libvirt_private.syms | 2 +- src/qemu/qemu_hostdev.c | 75 ++++++++++++++++++++++++++---------------------- src/util/virscsi.c | 48 +++++++++++++++++++++++++------ src/util/virscsi.h | 7 +++-- 4 files changed, 84 insertions(+), 48 deletions(-) diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms index 65d1bde..bd5f466 100644 --- a/src/libvirt_private.syms +++ b/src/libvirt_private.syms @@ -1677,7 +1677,7 @@ virSCSIDeviceGetSgName; virSCSIDeviceGetShareable; virSCSIDeviceGetTarget; virSCSIDeviceGetUnit; -virSCSIDeviceGetUsedBy; +virSCSIDeviceIsAvailable; virSCSIDeviceListAdd; virSCSIDeviceListCount; virSCSIDeviceListDel; diff --git a/src/qemu/qemu_hostdev.c b/src/qemu/qemu_hostdev.c index 86a463a..9d81e94 100644 --- a/src/qemu/qemu_hostdev.c +++ b/src/qemu/qemu_hostdev.c @@ -250,13 +250,14 @@ qemuUpdateActiveScsiHostdevs(virQEMUDriverPtr driver, virDomainHostdevDefPtr hostdev = NULL; size_t i; int ret = -1; + virSCSIDevicePtr scsi = NULL; + virSCSIDevicePtr tmp = NULL; if (!def->nhostdevs) return 0; virObjectLock(driver->activeScsiHostdevs); for (i = 0; i < def->nhostdevs; i++) { - virSCSIDevicePtr scsi = NULL; hostdev = def->hostdevs[i]; if (hostdev->mode != VIR_DOMAIN_HOSTDEV_MODE_SUBSYS || @@ -271,11 +272,18 @@ qemuUpdateActiveScsiHostdevs(virQEMUDriverPtr driver, hostdev->shareable))) goto cleanup; - virSCSIDeviceSetUsedBy(scsi, def->name); - - if (virSCSIDeviceListAdd(driver->activeScsiHostdevs, scsi) < 0) { + if ((tmp = virSCSIDeviceListFind(driver->activeScsiHostdevs, scsi))) { + if (virSCSIDeviceSetUsedBy(tmp, def->name) < 0) { + virSCSIDeviceFree(scsi); + goto cleanup; + } virSCSIDeviceFree(scsi); - goto cleanup; + } else { + if (virSCSIDeviceSetUsedBy(scsi, def->name) < 0 || + virSCSIDeviceListAdd(driver->activeScsiHostdevs, scsi) < 0) { + virSCSIDeviceFree(scsi); + goto cleanup; + }

It took some thinking, but I convinced myself that this path doesn't need the shared check since it's only called from qemuProcessReconnect; however, if something else did call it some day then that check may be necessary. It may be wise to add it anyway... I have no strong opinion about it being required for this change.