/* * domain_cgroup.c: cgroup functions shared between hypervisor drivers * * Copyright IBM Corp. 2020 * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library. If not, see * . */ #include #include "domain_cgroup.h" #include "domain_driver.h" #include "virutil.h" #define VIR_FROM_THIS VIR_FROM_DOMAIN int virDomainCgroupSetupBlkio(virCgroupPtr cgroup, virDomainBlkiotune blkio) { size_t i; if (blkio.weight != 0 && virCgroupSetBlkioWeight(cgroup, blkio.weight) < 0) return -1; if (blkio.ndevices) { for (i = 0; i < blkio.ndevices; i++) { virBlkioDevicePtr dev = &blkio.devices[i]; if (dev->weight && virCgroupSetupBlkioDeviceWeight(cgroup, dev->path, &dev->weight) < 0) return -1; if (dev->riops && virCgroupSetupBlkioDeviceReadIops(cgroup, dev->path, &dev->riops) < 0) return -1; if (dev->wiops && virCgroupSetupBlkioDeviceWriteIops(cgroup, dev->path, &dev->wiops) < 0) return -1; if (dev->rbps && virCgroupSetupBlkioDeviceReadBps(cgroup, dev->path, &dev->rbps) < 0) return -1; if (dev->wbps && virCgroupSetupBlkioDeviceWriteBps(cgroup, dev->path, &dev->wbps) < 0) return -1; } } return 0; } int virDomainCgroupSetupMemtune(virCgroupPtr cgroup, virDomainMemtune mem) { if (virMemoryLimitIsSet(mem.hard_limit)) if (virCgroupSetMemoryHardLimit(cgroup, mem.hard_limit) < 0) return -1; if (virMemoryLimitIsSet(mem.soft_limit)) if (virCgroupSetMemorySoftLimit(cgroup, mem.soft_limit) < 0) return -1; if (virMemoryLimitIsSet(mem.swap_hard_limit)) if (virCgroupSetMemSwapHardLimit(cgroup, mem.swap_hard_limit) < 0) return -1; return 0; } int virDomainCgroupSetupDomainBlkioParameters(virCgroupPtr cgroup, virDomainDefPtr def, virTypedParameterPtr params, int nparams) { size_t i; int ret = 0; for (i = 0; i < nparams; i++) { virTypedParameterPtr param = ¶ms[i]; if (STREQ(param->field, VIR_DOMAIN_BLKIO_WEIGHT)) { if (virCgroupSetBlkioWeight(cgroup, params[i].value.ui) < 0 || virCgroupGetBlkioWeight(cgroup, &def->blkio.weight) < 0) ret = -1; } else if (STREQ(param->field, VIR_DOMAIN_BLKIO_DEVICE_WEIGHT) || STREQ(param->field, VIR_DOMAIN_BLKIO_DEVICE_READ_IOPS) || STREQ(param->field, VIR_DOMAIN_BLKIO_DEVICE_WRITE_IOPS) || STREQ(param->field, VIR_DOMAIN_BLKIO_DEVICE_READ_BPS) || STREQ(param->field, VIR_DOMAIN_BLKIO_DEVICE_WRITE_BPS)) { size_t ndevices; virBlkioDevicePtr devices = NULL; size_t j; if (virDomainDriverParseBlkioDeviceStr(params[i].value.s, param->field, &devices, &ndevices) < 0) { ret = -1; continue; } if (STREQ(param->field, VIR_DOMAIN_BLKIO_DEVICE_WEIGHT)) { for (j = 0; j < ndevices; j++) { if (virCgroupSetupBlkioDeviceWeight(cgroup, devices[j].path, &devices[j].weight) < 0) { ret = -1; break; } } } else if (STREQ(param->field, VIR_DOMAIN_BLKIO_DEVICE_READ_IOPS)) { for (j = 0; j < ndevices; j++) { if (virCgroupSetupBlkioDeviceReadIops(cgroup, devices[j].path, &devices[j].riops) < 0) { ret = -1; break; } } } else if (STREQ(param->field, VIR_DOMAIN_BLKIO_DEVICE_WRITE_IOPS)) { for (j = 0; j < ndevices; j++) { if (virCgroupSetupBlkioDeviceWriteIops(cgroup, devices[j].path, &devices[j].wiops) < 0) { ret = -1; break; } } } else if (STREQ(param->field, VIR_DOMAIN_BLKIO_DEVICE_READ_BPS)) { for (j = 0; j < ndevices; j++) { if (virCgroupSetupBlkioDeviceReadBps(cgroup, devices[j].path, &devices[j].rbps) < 0) { ret = -1; break; } } } else if (STREQ(param->field, VIR_DOMAIN_BLKIO_DEVICE_WRITE_BPS)) { for (j = 0; j < ndevices; j++) { if (virCgroupSetupBlkioDeviceWriteBps(cgroup, devices[j].path, &devices[j].wbps) < 0) { ret = -1; break; } } } else { virReportError(VIR_ERR_INVALID_ARG, _("Unknown blkio parameter %s"), param->field); ret = -1; virBlkioDeviceArrayClear(devices, ndevices); g_free(devices); continue; } if (j != ndevices || virDomainDriverMergeBlkioDevice(&def->blkio.devices, &def->blkio.ndevices, devices, ndevices, param->field) < 0) ret = -1; virBlkioDeviceArrayClear(devices, ndevices); g_free(devices); } } return ret; } int virDomainCgroupSetMemoryLimitParameters(virCgroupPtr cgroup, virDomainObjPtr vm, virDomainDefPtr liveDef, virDomainDefPtr persistentDef, virTypedParameterPtr params, int nparams) { unsigned long long swap_hard_limit; unsigned long long hard_limit = 0; unsigned long long soft_limit = 0; bool set_swap_hard_limit = false; bool set_hard_limit = false; bool set_soft_limit = false; int rc; #define VIR_GET_LIMIT_PARAMETER(PARAM, VALUE) \ if ((rc = virTypedParamsGetULLong(params, nparams, PARAM, &VALUE)) < 0) \ return -1; \ \ if (rc == 1) \ set_ ## VALUE = true; VIR_GET_LIMIT_PARAMETER(VIR_DOMAIN_MEMORY_SWAP_HARD_LIMIT, swap_hard_limit) VIR_GET_LIMIT_PARAMETER(VIR_DOMAIN_MEMORY_HARD_LIMIT, hard_limit) VIR_GET_LIMIT_PARAMETER(VIR_DOMAIN_MEMORY_SOFT_LIMIT, soft_limit) #undef VIR_GET_LIMIT_PARAMETER /* Swap hard limit must be greater than hard limit. */ if (set_swap_hard_limit || set_hard_limit) { unsigned long long mem_limit = vm->def->mem.hard_limit; unsigned long long swap_limit = vm->def->mem.swap_hard_limit; if (set_swap_hard_limit) swap_limit = swap_hard_limit; if (set_hard_limit) mem_limit = hard_limit; if (mem_limit > swap_limit) { virReportError(VIR_ERR_INVALID_ARG, "%s", _("memory hard_limit tunable value must be lower " "than or equal to swap_hard_limit")); return -1; } } #define VIR_SET_MEM_PARAMETER(FUNC, VALUE) \ if (set_ ## VALUE) { \ if (liveDef) { \ if ((rc = FUNC(cgroup, VALUE)) < 0) \ return -1; \ liveDef->mem.VALUE = VALUE; \ } \ \ if (persistentDef) \ persistentDef->mem.VALUE = VALUE; \ } /* Soft limit doesn't clash with the others */ VIR_SET_MEM_PARAMETER(virCgroupSetMemorySoftLimit, soft_limit); /* set hard limit before swap hard limit if decreasing it */ if (liveDef && liveDef->mem.hard_limit > hard_limit) { VIR_SET_MEM_PARAMETER(virCgroupSetMemoryHardLimit, hard_limit); /* inhibit changing the limit a second time */ set_hard_limit = false; } VIR_SET_MEM_PARAMETER(virCgroupSetMemSwapHardLimit, swap_hard_limit); /* otherwise increase it after swap hard limit */ VIR_SET_MEM_PARAMETER(virCgroupSetMemoryHardLimit, hard_limit); #undef VIR_SET_MEM_PARAMETER return 0; }