Re: [libvirt] [PATCH 1/8] Fix list updating after disk/network/hostdev hot-unplug

The current code makes a poor effort at updating the device arrays after hot-unplug. Fix that and combine the two code paths into one. * src/qemu_driver.c: fix list updating in qemudDomainDetachNetDevice(), qemudDomainDetachPciDiskDevice() and qemudDomainDetachHostPciDevice() --- src/qemu_driver.c | 54 ++++++++++++++++++++++++---------------------------- 1 files changed, 25 insertions(+), 29 deletions(-) diff --git a/src/qemu_driver.c b/src/qemu_driver.c index d9502bb..6476644 100644 --- a/src/qemu_driver.c +++ b/src/qemu_driver.c @@ -5704,18 +5704,17 @@ try_command: goto cleanup; } - if (vm->def->ndisks > 1) { - vm->def->disks[i] = vm->def->disks[--vm->def->ndisks]; - if (VIR_REALLOC_N(vm->def->disks, vm->def->ndisks) < 0) { - virReportOOMError(conn); - goto cleanup; - } - qsort(vm->def->disks, vm->def->ndisks, sizeof(*vm->def->disks), - virDomainDiskQSort); - } else { - VIR_FREE(vm->def->disks[0]); - vm->def->ndisks = 0; + if (i != --vm->def->ndisks) + memmove(&vm->def->disks[i], + &vm->def->disks[i+1], + sizeof(*vm->def->disks) * (vm->def->ndisks-i)); + if (VIR_REALLOC_N(vm->def->disks, vm->def->ndisks) < 0) { + virReportOOMError(conn); + goto cleanup; } + qsort(vm->def->disks, vm->def->ndisks, sizeof(*vm->def->disks), + virDomainDiskQSort); + ret = 0; cleanup: @@ -5803,16 +5802,15 @@ qemudDomainDetachNetDevice(virConnectPtr conn, DEBUG("%s: host_net_remove reply: %s", vm->def->name, reply); - if (vm->def->nnets > 1) { - vm->def->nets[i] = vm->def->nets[--vm->def->nnets]; - if (VIR_REALLOC_N(vm->def->nets, vm->def->nnets) < 0) { - virReportOOMError(conn); - goto cleanup; - } - } else { - VIR_FREE(vm->def->nets[0]); - vm->def->nnets = 0; + if (i != --vm->def->nnets) + memmove(&vm->def->nets[i], + &vm->def->nets[i+1], + sizeof(*vm->def->nets) * (vm->def->nnets-i)); + if (VIR_REALLOC_N(vm->def->nets, vm->def->nnets) < 0) { + virReportOOMError(conn); + goto cleanup; } + ret = 0; cleanup: @@ -5908,15 +5906,13 @@ static int qemudDomainDetachHostPciDevice(virConnectPtr conn, pciFreeDevice(conn, pci); } - if (vm->def->nhostdevs > 1) { - vm->def->hostdevs[i] = vm->def->hostdevs[--vm->def->nhostdevs]; - if (VIR_REALLOC_N(vm->def->hostdevs, vm->def->nhostdevs) < 0) { - virReportOOMError(conn); - ret = -1; - } - } else { - VIR_FREE(vm->def->hostdevs[0]); - vm->def->nhostdevs = 0; + if (i != --vm->def->nhostdevs) + memmove(&vm->def->hostdevs[i], + &vm->def->hostdevs[i+1], + sizeof(*vm->def->hostdevs) * (vm->def->nhostdevs-i)); + if (VIR_REALLOC_N(vm->def->hostdevs, vm->def->nhostdevs) < 0) { + virReportOOMError(conn); + ret = -1; } return ret;