[libvirt] [PATCH 2/2] remote: Implement bulk domain stats APIs in the remote driver
Li Wei
lw at cn.fujitsu.com
Tue Aug 26 09:47:30 UTC 2014
On 08/26/2014 01:05 AM, Peter Krempa wrote:
> Implement the remote driver support for shuffling the domain stats
> around.
> ---
> daemon/remote.c | 91 ++++++++++++++++++++++++++++++++++++++++++++
> src/remote/remote_driver.c | 88 ++++++++++++++++++++++++++++++++++++++++++
> src/remote/remote_protocol.x | 26 ++++++++++++-
> src/remote_protocol-structs | 23 +++++++++++
> 4 files changed, 227 insertions(+), 1 deletion(-)
>
> diff --git a/daemon/remote.c b/daemon/remote.c
> index ea16789..34e6950 100644
> --- a/daemon/remote.c
> +++ b/daemon/remote.c
> @@ -6337,6 +6337,97 @@ remoteDispatchNetworkGetDHCPLeases(virNetServerPtr server ATTRIBUTE_UNUSED,
> }
>
>
> +static int
> +remoteDispatchDomainListGetStats(virNetServerPtr server ATTRIBUTE_UNUSED,
> + virNetServerClientPtr client,
> + virNetMessagePtr msg ATTRIBUTE_UNUSED,
> + virNetMessageErrorPtr rerr,
> + remote_domain_list_get_stats_args *args,
> + remote_domain_list_get_stats_ret *ret)
> +{
> + int rv = -1;
> + size_t i;
> + struct daemonClientPrivate *priv = virNetServerClientGetPrivateData(client);
> + virDomainStatsRecordPtr *retStats = NULL;
> + int nrecords = 0;
> + virDomainPtr *doms = NULL;
> +
> + if (!priv->conn) {
> + virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("connection not open"));
> + goto cleanup;
> + }
> +
> + if (args->doms.doms_len) {
> + if (VIR_ALLOC_N(doms, args->doms.doms_len + 1) < 0)
> + goto cleanup;
> +
> + for (i = 0; i < args->doms.doms_len; i++) {
> + if (!(doms[i] = get_nonnull_domain(priv->conn, args->doms.doms_val[i])))
> + goto cleanup;
> + }
> +
> + if ((nrecords = virDomainListGetStats(doms,
> + args->stats,
> + &retStats,
> + args->flags)) < 0)
> + goto cleanup;
> + } else {
> + if (!(virConnectGetAllDomainStats(priv->conn,
> + args->stats,
> + &retStats,
> + args->flags)) < 0)
if ((nrecords = virConnectGetAllDomainStats(priv->conn,
args->stats,
&retStats,
args->flags)) < 0)
> + goto cleanup;
> + }
> +
> + if (nrecords > REMOTE_DOMAIN_LIST_MAX) {
> + virReportError(VIR_ERR_INTERNAL_ERROR,
> + _("Number of domain stats records is %d, "
> + "which exceeds max limit: %d"),
> + nrecords, REMOTE_DOMAIN_LIST_MAX);
> + goto cleanup;
> + }
> +
> + if (retStats && nrecords) {
> + ret->retStats.retStats_len = nrecords;
> +
> + if (VIR_ALLOC_N(ret->retStats.retStats_val, nrecords) < 0)
> + goto cleanup;
> +
> + for (i = 0; i < nrecords; i++) {
> + virDomainStatsRecordPtr src = retStats[i];
> + remote_domain_stats_record *dst = ret->retStats.retStats_val + i;
> +
> + make_nonnull_domain(&dst->dom, src->dom);
> +
> + if (remoteSerializeTypedParameters(src->params, src->nparams,
> + &dst->params.params_val,
> + &dst->params.params_len,
> + VIR_TYPED_PARAM_STRING_OKAY) < 0)
> + goto cleanup;
> + }
> + } else {
> + ret->retStats.retStats_len = 0;
> + ret->retStats.retStats_val = NULL;
> + }
> +
> + ret->ret = nrecords;
> + rv = 0;
> +
> + cleanup:
> + if (rv < 0)
> + virNetMessageSaveError(rerr);
> + if (retStats)
> + virDomainStatsRecordListFree(retStats);
> + if (args->doms.doms_len) {
> + for (i = 0; i < args->doms.doms_len; i++)
> + virDomainFree(doms[i]);
> +
> + VIR_FREE(doms);
> + }
> + return rv;
> +}
> +
> +
> /*----- Helpers. -----*/
>
> /* get_nonnull_domain and get_nonnull_network turn an on-wire
> diff --git a/src/remote/remote_driver.c b/src/remote/remote_driver.c
> index 9a1d78f..41c807a 100644
> --- a/src/remote/remote_driver.c
> +++ b/src/remote/remote_driver.c
> @@ -7670,6 +7670,93 @@ remoteNetworkGetDHCPLeases(virNetworkPtr net,
> }
>
>
> +static int
> +remoteDomainListGetStats(virConnectPtr conn,
> + virDomainPtr *doms,
> + unsigned int ndoms,
> + unsigned int stats,
> + virDomainStatsRecordPtr **retStats,
> + unsigned int flags)
> +{
> + struct private_data *priv = conn->networkPrivateData;
> + int rv = -1;
> + size_t i;
> + remote_domain_list_get_stats_args args;
> + remote_domain_list_get_stats_ret ret;
> +
> + virDomainStatsRecordPtr *tmpret = NULL;
> +
> + if (ndoms) {
> + if (VIR_ALLOC_N(args.doms.doms_val, ndoms) < 0)
> + goto cleanup;
> +
> + for (i = 0; i < ndoms; i++)
> + make_nonnull_domain(args.doms.doms_val + i, doms[i]);
> + }
> + args.doms.doms_len = ndoms;
> +
> + args.stats = stats;
> + args.flags = flags;
> +
> + memset(&ret, 0, sizeof(ret));
> +
> + remoteDriverLock(priv);
> + if (call(conn, priv, 0, REMOTE_PROC_DOMAIN_LIST_GET_STATS,
> + (xdrproc_t)xdr_remote_domain_list_get_stats_args, (char *)&args,
> + (xdrproc_t)xdr_remote_domain_list_get_stats_ret, (char *)&ret) == -1) {
> + remoteDriverUnlock(priv);
> + goto cleanup;
> + }
> + remoteDriverUnlock(priv);
> +
> + if (ret.retStats.retStats_len > REMOTE_DOMAIN_LIST_MAX) {
> + virReportError(VIR_ERR_INTERNAL_ERROR,
> + _("Number of stats entries is %d, which exceeds max limit: %d"),
> + ret.retStats.retStats_len, REMOTE_DOMAIN_LIST_MAX);
> + goto cleanup;
> + }
> +
> + *retStats = NULL;
> +
> + if (ret.retStats.retStats_len) {
> + if (VIR_ALLOC_N(tmpret, ret.retStats.retStats_len) < 0)
Shouldn't we need to allocate one plus pointer here to act as a NULL sentinel
for virDomainStatsRecordListFree()?
Thanks,
Li Wei
> + goto cleanup;
> +
> + for (i = 0; i < ret.retStats.retStats_len; i++) {
> + virDomainStatsRecordPtr elem;
> + remote_domain_stats_record *rec = ret.retStats.retStats_val + i;
> +
> + if (VIR_ALLOC(elem) < 0)
> + goto cleanup;
> +
> + if (!(elem->dom = get_nonnull_domain(conn, rec->dom)))
> + goto cleanup;
> +
> + if (remoteDeserializeTypedParameters(rec->params.params_val,
> + rec->params.params_len,
> + REMOTE_PROC_DOMAIN_LIST_GET_STATS,
> + &elem->params,
> + &elem->nparams))
> + goto cleanup;
> +
> + tmpret[i] = elem;
> + }
> +
> + *retStats = tmpret;
> + tmpret = NULL;
> + }
> +
> + rv = ret.ret;
> +
> + cleanup:
> + if (tmpret)
> + virDomainStatsRecordListFree(tmpret);
> + xdr_free((xdrproc_t)xdr_remote_domain_list_get_stats_ret,
> + (char *) &ret);
> +
> + return rv;
> +}
> +
> /* get_nonnull_domain and get_nonnull_network turn an on-wire
> * (name, uuid) pair into virDomainPtr or virNetworkPtr object.
> * These can return NULL if underlying memory allocations fail,
> @@ -8008,6 +8095,7 @@ static virDriver remote_driver = {
> .domainSetTime = remoteDomainSetTime, /* 1.2.5 */
> .nodeGetFreePages = remoteNodeGetFreePages, /* 1.2.6 */
> .connectGetDomainCapabilities = remoteConnectGetDomainCapabilities, /* 1.2.7 */
> + .domainListGetStats = remoteDomainListGetStats, /* 1.2.8 */
> };
>
> static virNetworkDriver network_driver = {
> diff --git a/src/remote/remote_protocol.x b/src/remote/remote_protocol.x
> index 5c316fb..9729392 100644
> --- a/src/remote/remote_protocol.x
> +++ b/src/remote/remote_protocol.x
> @@ -241,6 +241,9 @@ const REMOTE_DOMAIN_FSFREEZE_MOUNTPOINTS_MAX = 256;
> /* Upper limit on the maximum number of leases in one lease file */
> const REMOTE_NETWORK_DHCP_LEASES_MAX = 65536;
>
> +/* Upper limit on count of parameters returned via bulk stats API */
> +const REMOTE_DOMAIN_STATS_PARAMS_MAX = 2048;
> +
> /* UUID. VIR_UUID_BUFLEN definition comes from libvirt.h */
> typedef opaque remote_uuid[VIR_UUID_BUFLEN];
>
> @@ -3057,6 +3060,21 @@ struct remote_network_get_dhcp_leases_ret {
> unsigned int ret;
> };
>
> +struct remote_domain_stats_record {
> + remote_nonnull_domain dom;
> + remote_typed_param params<REMOTE_DOMAIN_STATS_PARAMS_MAX>;
> +};
> +
> +struct remote_domain_list_get_stats_args {
> + remote_nonnull_domain doms<REMOTE_DOMAIN_LIST_MAX>;
> + unsigned int stats;
> + unsigned int flags;
> +};
> +
> +struct remote_domain_list_get_stats_ret {
> + remote_domain_stats_record retStats<REMOTE_DOMAIN_LIST_MAX>;
> + int ret;
> +};
> /*----- Protocol. -----*/
>
> /* Define the program number, protocol version and procedure numbers here. */
> @@ -5420,5 +5438,11 @@ enum remote_procedure {
> * @generate: both
> * @acl: connect:write
> */
> - REMOTE_PROC_CONNECT_GET_DOMAIN_CAPABILITIES = 342
> + REMOTE_PROC_CONNECT_GET_DOMAIN_CAPABILITIES = 342,
> +
> + /**
> + * @generate: none
> + * @acl: domain:read
> + */
> + REMOTE_PROC_DOMAIN_LIST_GET_STATS = 343
> };
> diff --git a/src/remote_protocol-structs b/src/remote_protocol-structs
> index 9bf09b8..3d9f5e7 100644
> --- a/src/remote_protocol-structs
> +++ b/src/remote_protocol-structs
> @@ -2519,6 +2519,28 @@ struct remote_network_get_dhcp_leases_ret {
> } leases;
> u_int ret;
> };
> +struct remote_domain_stats_record {
> + remote_nonnull_domain dom;
> + struct {
> + u_int params_len;
> + remote_typed_param * params_val;
> + } params;
> +};
> +struct remote_domain_list_get_stats_args {
> + struct {
> + u_int doms_len;
> + remote_nonnull_domain * doms_val;
> + } doms;
> + u_int stats;
> + u_int flags;
> +};
> +struct remote_domain_list_get_stats_ret {
> + struct {
> + u_int retStats_len;
> + remote_domain_stats_record * retStats_val;
> + } retStats;
> + int ret;
> +};
> enum remote_procedure {
> REMOTE_PROC_CONNECT_OPEN = 1,
> REMOTE_PROC_CONNECT_CLOSE = 2,
> @@ -2862,4 +2884,5 @@ enum remote_procedure {
> REMOTE_PROC_NODE_GET_FREE_PAGES = 340,
> REMOTE_PROC_NETWORK_GET_DHCP_LEASES = 341,
> REMOTE_PROC_CONNECT_GET_DOMAIN_CAPABILITIES = 342,
> + REMOTE_PROC_DOMAIN_LIST_GET_STATS = 343,
> };
>
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