[libvirt] [PATCHv6 4/6] virNodeGetCPUStats: Implement remote protocol

virNodeGetCPUStats: Implement remote protocol Signed-off-by: Minoru Usui <usui(a)mxm.nes.nec.co.jp&gt; --- daemon/remote.c | 76 ++++++++++++++++++++++++++++++++++++++++++ src/remote/remote_driver.c | 65 +++++++++++++++++++++++++++++++++++ src/remote/remote_protocol.x | 21 +++++++++++- 3 files changed, 161 insertions(+), 1 deletions(-) diff --git a/daemon/remote.c b/daemon/remote.c index 80783b3..fb603f4 100644 --- a/daemon/remote.c +++ b/daemon/remote.c @@ -1788,6 +1788,82 @@ cleanup: return rv; } +static int +remoteDispatchNodeGetCPUStats (struct qemud_server *server ATTRIBUTE_UNUSED, + struct qemud_client *client ATTRIBUTE_UNUSED, + virConnectPtr conn, + remote_message_header *hdr ATTRIBUTE_UNUSED, + remote_error *rerr, + remote_node_get_cpu_stats_args *args, + remote_node_get_cpu_stats_ret *ret) +{ + virCPUStatsPtr params = NULL; + int i; + int nparams = args->nparams; + unsigned int flags; + int rv = -1; + + if (!conn) { + virNetError(VIR_ERR_INTERNAL_ERROR, "%s", _("connection not open")); + goto cleanup; + } + + flags = args->flags; + + if (nparams > REMOTE_NODE_CPU_STATS_MAX) { + virNetError(VIR_ERR_INTERNAL_ERROR, "%s", _("nparams too large")); + goto cleanup; + } + if (VIR_ALLOC_N(params, nparams) < 0) { + virReportOOMError(); + goto cleanup; + } + + if (virNodeGetCPUStats(conn, params, &nparams, flags) < 0) + goto cleanup; + + /* In this case, we need to send back the number of stats + * supported + */ + if (args->nparams == 0) { + ret->nparams = nparams; + goto success; + } + + /* Serialise the memory parameters. */ + ret->params.params_len = nparams; + if (VIR_ALLOC_N(ret->params.params_val, nparams) < 0) + goto no_memory; + + for (i = 0; i < nparams; ++i) { + /* remoteDispatchClientRequest will free this: */ + ret->params.params_val[i].field = strdup(params[i].field); + if (ret->params.params_val[i].field == NULL) + goto no_memory; + + ret->params.params_val[i].value = params[i].value; + } + +success: + rv = 0; + +cleanup: + if (rv < 0) { + remoteDispatchError(rerr); + if (ret->params.params_val) { + for (i = 0; i < nparams; i++) + VIR_FREE(ret->params.params_val[i].field); + VIR_FREE(ret->params.params_val); + } + } + VIR_FREE(params); + return rv; + +no_memory: + virReportOOMError(); + goto cleanup; +} + /*-------------------------------------------------------------*/ static int diff --git a/src/remote/remote_driver.c b/src/remote/remote_driver.c index 1691dab..924ea97 100644 --- a/src/remote/remote_driver.c +++ b/src/remote/remote_driver.c @@ -1694,6 +1694,70 @@ done: } static int +remoteNodeGetCPUStats (virConnectPtr conn, + virCPUStatsPtr params, int *nparams, + unsigned int flags) +{ + int rv = -1; + remote_node_get_cpu_stats_args args; + remote_node_get_cpu_stats_ret ret; + int i = -1; + struct private_data *priv = conn->privateData; + + remoteDriverLock(priv); + + args.nparams = *nparams; + args.flags = flags; + + memset (&ret, 0, sizeof ret); + if (call (conn, priv, 0, REMOTE_PROC_NODE_GET_CPU_STATS, + (xdrproc_t) xdr_remote_node_get_cpu_stats_args, + (char *) &args, + (xdrproc_t) xdr_remote_node_get_cpu_stats_ret, + (char *) &ret) == -1) + goto done; + + /* Check the length of the returned list carefully. */ + if (ret.params.params_len > REMOTE_NODE_CPU_STATS_MAX || + ret.params.params_len > *nparams) { + remoteError(VIR_ERR_RPC, "%s", + _("remoteNodeGetCPUStats: " + "returned number of stats exceeds limit")); + goto cleanup; + } + /* Handle the case when the caller does not know the number of stats + * and is asking for the number of stats supported + */ + if (*nparams == 0) { + *nparams = ret.nparams; + rv = 0; + goto cleanup; + } + + *nparams = ret.params.params_len; + + /* Deserialise the result. */ + for (i = 0; i < *nparams; ++i) { + if (virStrcpyStatic(params[i].field, ret.params.params_val[i].field) == NULL) { + remoteError(VIR_ERR_INTERNAL_ERROR, + _("Stats %s too big for destination"), + ret.params.params_val[i].field); + goto cleanup; + } + params[i].value = ret.params.params_val[i].value; + } + + rv = 0; + +cleanup: + xdr_free ((xdrproc_t) xdr_remote_node_get_cpu_stats_ret, + (char *) &ret); +done: + remoteDriverUnlock(priv); + return rv; +} + +static int remoteNodeGetCellsFreeMemory(virConnectPtr conn, unsigned long long *freeMems, int startCell, @@ -6823,6 +6887,7 @@ static virDriver remote_driver = { .domainBlockPeek = remoteDomainBlockPeek, /* 0.4.2 */ .domainMemoryPeek = remoteDomainMemoryPeek, /* 0.4.2 */ .domainGetBlockInfo = remoteDomainGetBlockInfo, /* 0.8.1 */ + .nodeGetCPUStats = remoteNodeGetCPUStats, /* 0.9.2 */ .nodeGetCellsFreeMemory = remoteNodeGetCellsFreeMemory, /* 0.3.3 */ .nodeGetFreeMemory = remoteNodeGetFreeMemory, /* 0.3.3 */ .domainEventRegister = remoteDomainEventRegister, /* 0.5.0 */ diff --git a/src/remote/remote_protocol.x b/src/remote/remote_protocol.x index f0da95d..30cb934 100644 --- a/src/remote/remote_protocol.x +++ b/src/remote/remote_protocol.x @@ -134,6 +134,9 @@ const REMOTE_DOMAIN_BLKIO_PARAMETERS_MAX = 16; /* Upper limit on list of memory parameters. */ const REMOTE_DOMAIN_MEMORY_PARAMETERS_MAX = 16; +/* Upper limit on list of cpu stats. */ +const REMOTE_NODE_CPU_STATS_MAX = 16; + /* Upper limit on number of NUMA cells */ const REMOTE_NODE_MAX_CELLS = 1024; @@ -359,6 +362,11 @@ struct remote_memory_param { remote_memory_param_value value; }; +struct remote_node_get_cpu_stats { + remote_nonnull_string field; + unsigned hyper value; +}; + /*----- Calls. -----*/ /* For each call we may have a 'remote_CALL_args' and 'remote_CALL_ret' @@ -440,6 +448,16 @@ struct remote_get_capabilities_ret { remote_nonnull_string capabilities; }; +struct remote_node_get_cpu_stats_args { + int nparams; + unsigned int flags; +}; + +struct remote_node_get_cpu_stats_ret { + remote_node_get_cpu_stats params<REMOTE_NODE_CPU_STATS_MAX>; + int nparams; +}; + struct remote_node_get_cells_free_memory_args { int startCell; int maxCells; @@ -2291,7 +2309,8 @@ enum remote_procedure { REMOTE_PROC_DOMAIN_MIGRATE_PERFORM3 = 216, /* skipgen skipgen */ REMOTE_PROC_DOMAIN_MIGRATE_FINISH3 = 217, /* skipgen skipgen */ REMOTE_PROC_DOMAIN_MIGRATE_CONFIRM3 = 218, /* skipgen skipgen */ - REMOTE_PROC_DOMAIN_SET_SCHEDULER_PARAMETERS_FLAGS = 219 /* skipgen skipgen */ + REMOTE_PROC_DOMAIN_SET_SCHEDULER_PARAMETERS_FLAGS = 219, /* skipgen skipgen */ + REMOTE_PROC_NODE_GET_CPU_STATS = 220 /* skipgen skipgen */ /* * Notice how the entries are grouped in sets of 10 ? -- 1.7.1