Re: [libvirt] [PATCH v2 1/3] vz: add net dev statistiscs

From: Nikolay Shirokovskiy <nshirokovskiy(a)parallels.com&gt; Populate counters SDK currenly supports: rx_bytes rx_packets tx_bytes tx_packets Comments. 1. Use vzDomObjFromDomainRef/virDomainObjEndAPI pair to get domain object as we use prlsdkGetStatsParam that can release domain object lock and thus we need a reference in case domain is deleated meanwhile. 2. Introduce prlsdkGetAdapterIndex to convert from device name to SDK device index. We need this index as it is used in statistics data from SDK identify network device. Unfortunately we need to enumerate network devices to discover this mapping.

Signed-off-by: Nikolay Shirokovskiy <nshirokovskiy(a)virtuozzo.com&gt; --- src/vz/vz_driver.c | 44 +++++++++++++++++++++++++++++++++ src/vz/vz_sdk.c | 69 +++++++++++++++++++++++++++++++++++++++++++++++++++- src/vz/vz_sdk.h | 4 +++ 3 files changed, 116 insertions(+), 1 deletions(-) diff --git a/src/vz/vz_driver.c b/src/vz/vz_driver.c index cef3c77..deac572 100644 --- a/src/vz/vz_driver.c +++ b/src/vz/vz_driver.c @@ -1321,6 +1321,49 @@ vzDomainBlockStatsFlags(virDomainPtr domain, return ret; } +static int +vzDomainInterfaceStats(virDomainPtr domain, + const char *path, + virDomainInterfaceStatsPtr stats) +{ + virDomainObjPtr dom = NULL; + int ret = -1; + int net_index = -1; + char *name = NULL; + + if (!(dom = vzDomObjFromDomainRef(domain))) + return -1; + + net_index = prlsdkGetAdapterIndex(dom, path); + if (net_index < 0) + return -1; + +#define PARALLELS_GET_NET_COUNTER(VAL, NAME) \ + if (virAsprintf(&name, "net.nic%d.%s", net_index, NAME) < 0) \ + goto cleanup; \ + if (prlsdkGetStatsParam(dom, name, &stats->VAL) < 0) \ + goto cleanup; \ + VIR_FREE(name); + + PARALLELS_GET_NET_COUNTER(rx_bytes, "bytes_in") + PARALLELS_GET_NET_COUNTER(rx_packets, "pkts_in") + PARALLELS_GET_NET_COUNTER(tx_bytes, "bytes_out") + PARALLELS_GET_NET_COUNTER(tx_packets, "pkts_out") + stats->rx_errs = -1; + stats->rx_drop = -1; + stats->tx_errs = -1; + stats->tx_drop = -1; + +#undef PARALLELS_GET_NET_COUNTER + ret = 0; + + cleanup: + VIR_FREE(name); + if (dom) + virDomainObjEndAPI(&dom); + + return ret; +} static virHypervisorDriver vzDriver = { .name = "vz", @@ -1373,6 +1416,7 @@ static virHypervisorDriver vzDriver = { .domainGetMaxMemory = vzDomainGetMaxMemory, /* 1.2.15 */ .domainBlockStats = vzDomainBlockStats, /* 1.3.0 */ .domainBlockStatsFlags = vzDomainBlockStatsFlags, /* 1.3.0 */ + .domainInterfaceStats = vzDomainInterfaceStats, /* 1.3.0 */ }; static virConnectDriver vzConnectDriver = { diff --git a/src/vz/vz_sdk.c b/src/vz/vz_sdk.c index f9cde44..0956b58 100644 --- a/src/vz/vz_sdk.c +++ b/src/vz/vz_sdk.c @@ -3562,7 +3562,7 @@ prlsdkExtractStatsParam(PRL_HANDLE sdkstats, const char *name, long long *val) #define PARALLELS_STATISTICS_TIMEOUT (60 * 1000) -static int +int prlsdkGetStatsParam(virDomainObjPtr dom, const char *name, long long *val) { vzDomObjPtr privdom = dom->privateData; @@ -3658,3 +3658,70 @@ prlsdkGetBlockStats(virDomainObjPtr dom, virDomainDiskDefPtr disk, virDomainBloc VIR_FREE(name); return ret; } + +static PRL_HANDLE +prlsdkFindNetAdapter(virDomainObjPtr dom, const char *path) +{ + PRL_UINT32 count = 0; + vzDomObjPtr privdom = dom->privateData; + PRL_UINT32 buflen = 0; + PRL_RESULT pret; + size_t i; + char *name = NULL; + PRL_HANDLE net = PRL_INVALID_HANDLE; + + pret = PrlVmCfg_GetNetAdaptersCount(privdom->sdkdom, &count); + prlsdkCheckRetGoto(pret, error); + + for (i = 0; i < count; ++i) { + pret = PrlVmCfg_GetNetAdapter(privdom->sdkdom, i, &net); + prlsdkCheckRetGoto(pret, error); + + pret = PrlVmDevNet_GetHostInterfaceName(net, NULL, &buflen); + prlsdkCheckRetGoto(pret, error); + + if (VIR_ALLOC_N(name, buflen) < 0) + goto error; + + pret = PrlVmDevNet_GetHostInterfaceName(net, name, &buflen); + prlsdkCheckRetGoto(pret, error); + + if (STREQ(name, path)) + break; + + VIR_FREE(name); + PrlHandle_Free(net); + net = PRL_INVALID_HANDLE; + } + + if (net == PRL_INVALID_HANDLE) + virReportError(VIR_ERR_INVALID_ARG, + _("invalid path, '%s' is not a known interface"), path); + return net; + + error: + VIR_FREE(name); + PrlHandle_Free(net); + return PRL_INVALID_HANDLE; +} + +int +prlsdkGetAdapterIndex(virDomainObjPtr dom, const char *path) +{ + PRL_HANDLE net = PRL_INVALID_HANDLE; + PRL_UINT32 net_index = -1; + PRL_RESULT pret; + int ret = -1; + + net = prlsdkFindNetAdapter(dom, path); + if (net == PRL_INVALID_HANDLE) + return -1; + + pret = PrlVmDev_GetIndex(net, &net_index); + prlsdkCheckRetGoto(pret, cleanup); + + ret = net_index; + cleanup: + PrlHandle_Free(net); + return ret; +} diff --git a/src/vz/vz_sdk.h b/src/vz/vz_sdk.h index dd4fecf..8f72e24 100644 --- a/src/vz/vz_sdk.h +++ b/src/vz/vz_sdk.h @@ -66,3 +66,7 @@ int prlsdkDetachVolume(virDomainObjPtr dom, virDomainDiskDefPtr disk); int prlsdkGetBlockStats(virDomainObjPtr dom, virDomainDiskDefPtr disk, virDomainBlockStatsPtr stats); +int +prlsdkGetAdapterIndex(virDomainObjPtr dom, const char *path); +int +prlsdkGetStatsParam(virDomainObjPtr dom, const char *name, long long *val);