[libvirt] [PATCHv2] nodedev: add RDMA and tx-udp_tnl-segmentation NIC capabilities
John Ferlan
jferlan at redhat.com
Mon Jul 20 22:06:08 UTC 2015
On 07/19/2015 06:11 AM, Moshe Levi wrote:
> Adding functionality to libvirt that will allow
> it query the interface for the availability of RDMA and
> tx-udp_tnl-segmentation Offloading NIC capabilities
>
> Here is an example of the feature XML definition:
>
> <device>
> <name>net_eth4_90_e2_ba_5e_a5_45</name>
> <path>/sys/devices/pci0000:00/0000:00:03.0/0000:08:00.1/net/eth4</path>
> <parent>pci_0000_08_00_1</parent>
> <capability type='net'>
> <interface>eth4</interface>
> <address>90:e2:ba:5e:a5:45</address>
> <link speed='10000' state='up'/>
> <feature name='rx'/>
> <feature name='tx'/>
> <feature name='sg'/>
> <feature name='tso'/>
> <feature name='gso'/>
> <feature name='gro'/>
> <feature name='rxvlan'/>
> <feature name='txvlan'/>
> <feature name='rxhash'/>
> <feature name='rdma'/>
> <feature name='txudptnl'/>
> <capability type='80203'/>
> </capability>
> </device>
> ---
> configure.ac | 2 +-
> docs/formatnode.html.in | 2 +
> src/conf/device_conf.c | 4 +-
> src/conf/device_conf.h | 2 +
> src/util/virnetdev.c | 141 +++++++++++++++++++--
> src/util/virnetdev.h | 1 +
> tests/nodedevschemadata/net_00_13_02_b9_f9_d3.xml | 2 +
> tests/nodedevschemadata/net_00_15_58_2f_e9_55.xml | 2 +
> 8 files changed, 144 insertions(+), 12 deletions(-)
>
> diff --git a/configure.ac b/configure.ac
> index a7f38e8..70b3ef3 100644
> --- a/configure.ac
> +++ b/configure.ac
> @@ -390,7 +390,7 @@ AC_CHECK_TYPE([struct ifreq],
> ]])
>
> AC_CHECK_DECLS([ETH_FLAG_TXVLAN, ETH_FLAG_NTUPLE, ETH_FLAG_RXHASH, ETH_FLAG_LRO,
> - ETHTOOL_GGSO, ETHTOOL_GGRO, ETHTOOL_GFLAGS],
> + ETHTOOL_GGSO, ETHTOOL_GGRO, ETHTOOL_GFLAGS, ETHTOOL_GFEATURES],
> [], [], [[#include <linux/ethtool.h>
> ]])
>
> diff --git a/docs/formatnode.html.in b/docs/formatnode.html.in
> index 3ff1bef..ed00af5 100644
> --- a/docs/formatnode.html.in
> +++ b/docs/formatnode.html.in
> @@ -199,6 +199,8 @@
> <dt><code>txvlan</code></dt><dd>tx-vlan-offload</dd>
> <dt><code>ntuple</code></dt><dd>ntuple-filters</dd>
> <dt><code>rxhash</code></dt><dd>receive-hashing</dd>
> + <dt><code>rdma</code></dt><dd>remote-direct-memory-access</dd>
> + <dt><code>txudptnl</code></dt><dd>tx-udp-tunnel-segmentation</dd>
> </dl>
> </dd>
> <dt><code>capability</code></dt>
> diff --git a/src/conf/device_conf.c b/src/conf/device_conf.c
> index 98808e2..e7b7957 100644
> --- a/src/conf/device_conf.c
> +++ b/src/conf/device_conf.c
> @@ -51,7 +51,9 @@ VIR_ENUM_IMPL(virNetDevFeature,
> "rxvlan",
> "txvlan",
> "ntuple",
> - "rxhash")
> + "rxhash",
> + "rdma",
> + "txudptnl")
>
> int virDevicePCIAddressIsValid(virDevicePCIAddressPtr addr)
> {
> diff --git a/src/conf/device_conf.h b/src/conf/device_conf.h
> index 7ea90f6..40a2b3d 100644
> --- a/src/conf/device_conf.h
> +++ b/src/conf/device_conf.h
> @@ -74,6 +74,8 @@ typedef enum {
> VIR_NET_DEV_FEAT_TXVLAN,
> VIR_NET_DEV_FEAT_NTUPLE,
> VIR_NET_DEV_FEAT_RXHASH,
> + VIR_NET_DEV_FEAT_RDMA,
> + VIR_NET_DEV_FEAT_TXUDPTNL,
> VIR_NET_DEV_FEAT_LAST
> } virNetDevFeature;
>
> diff --git a/src/util/virnetdev.c b/src/util/virnetdev.c
> index e4fcd81..0dcb42d 100644
> --- a/src/util/virnetdev.c
> +++ b/src/util/virnetdev.c
> @@ -87,6 +87,14 @@ VIR_LOG_INIT("util.netdev");
> # define VIR_IFF_ALLMULTI 0
> #endif
>
> +#define RESOURCE_FILE_LEN 4096
> +#define TX_UDP_TNL 25
> +#define GFEATURES_SIZE 2
> +#define FEATURE_WORD(blocks, index, field) ((blocks)[(index) / 32U].field)
> +#define FEATURE_FIELD_FLAG(index) (1U << (index) % 32U)
> +#define FEATURE_BIT_IS_SET(blocks, index, field) \
> + (FEATURE_WORD(blocks, index, field) & FEATURE_FIELD_FLAG(index))
> +
> typedef enum {
> VIR_MCAST_TYPE_INDEX_TOKEN,
> VIR_MCAST_TYPE_NAME_TOKEN,
> @@ -1868,7 +1876,6 @@ virNetDevReplaceMacAddress(const char *linkdev,
> goto cleanup;
>
> ret = 0;
> -
> cleanup:
> VIR_FREE(path);
> return ret;
> @@ -2858,9 +2865,9 @@ static int virNetDevGetMulticastTable(const char *ifname,
> }
>
> ret = 0;
> +
> cleanup:
> virNetDevMcastListClear(&mcast);
> -
> return ret;
> }
>
> @@ -2943,11 +2950,76 @@ int virNetDevGetRxFilter(const char *ifname,
> return ret;
> }
>
> +
> +/**
> + * virNetDevRDMAFeature
> + * This function checks for the availability of RDMA feature
> + * and add it to bitmap
> + *
> + * @ifname: name of the interface
> + * @out: add RDMA feature if exist to bitmap
> + *
> + * Returns 0 on success, -1 on failure.
> + */
> +static int
> +virNetDevRDMAFeature(const char *ifname,
> + virBitmapPtr *out)
> +{
> + char *eth_devpath = NULL;
> + char *ib_devpath = NULL;
> + char *eth_res_buf = NULL;
> + char *ib_res_buf = NULL;
> + DIR *dirp = NULL;
> + struct dirent *dp;
> + int ret = -1;
> +
> + if (!(dirp = opendir(SYSFS_INFINIBAND_DIR))) {
> + virReportSystemError(errno,
> + _("Failed to opendir path '%s'"),
> + SYSFS_INFINIBAND_DIR);
> + goto cleanup;
> + }
> +
> + if (virAsprintf(ð_devpath, SYSFS_NET_DIR "%s/device/resource", ifname) < 0)
> + goto cleanup;
> + if (!virFileExists(eth_devpath))
> + goto cleanup;
> + if (virFileReadAll(eth_devpath, RESOURCE_FILE_LEN, ð_res_buf) < 0)
> + goto cleanup;
> +
> + while (virDirRead(dirp, &dp, SYSFS_INFINIBAND_DIR) > 0) {
> + if (dp->d_name[0] == '.')
> + continue;
> + if (virAsprintf(&ib_devpath, SYSFS_INFINIBAND_DIR "%s/device/resource", dp->d_name) < 0) {
> + VIR_FREE(ib_devpath);
If virAsprintf fails, then no need to VIR_FREE here
> + continue;
> + }
> + if (virFileReadAll(ib_devpath, RESOURCE_FILE_LEN, &ib_res_buf) < 0) {
> + VIR_FREE(ib_res_buf);
if virFileReadAll fails, ib_devpath should be VIR_FREE()'d
> + continue;
> + }
> + if (STREQ(eth_res_buf, ib_res_buf)) {
> + ignore_value(virBitmapSetBit(*out, VIR_NET_DEV_FEAT_RDMA));
> + break;
> + }
> + VIR_FREE(ib_res_buf);
> + }
How about if I change the while loop to:
while (virDirRead(dirp, &dp, SYSFS_INFINIBAND_DIR) > 0) {
if (dp->d_name[0] == '.')
continue;
if (virAsprintf(&ib_devpath, SYSFS_INFINIBAND_DIR "%s/device/resource",
dp->d_name) < 0)
continue;
if (virFileReadAll(ib_devpath, RESOURCE_FILE_LEN, &ib_res_buf) > 0 &&
STREQ(eth_res_buf, ib_res_buf)) {
ignore_value(virBitmapSetBit(*out, VIR_NET_DEV_FEAT_RDMA));
break;
}
VIR_FREE(ib_devpath);
VIR_FREE(ib_res_buf);
}
NOTE: I considered >= 0 to do the STREQ, but that'd be pointless I think
> + ret = 0;
> +
> + cleanup:
> + closedir(dirp);
> + VIR_FREE(eth_devpath);
> + VIR_FREE(ib_devpath);
> + VIR_FREE(eth_res_buf);
> + VIR_FREE(ib_res_buf);
> + return ret;
> +}
> +
> #if defined(SIOCETHTOOL) && defined(HAVE_STRUCT_IFREQ)
>
> /**
> - * virNetDevFeatureAvailable
> - * This function checks for the availability of a network device feature
> + * virNetDevSendEthtoolIoctl
> + * This function sends ethtool ioctl request
> *
> * @ifname: name of the interface
> * @cmd: reference to an ethtool command structure
> @@ -2955,7 +3027,7 @@ int virNetDevGetRxFilter(const char *ifname,
> * Returns 0 on success, -1 on failure.
> */
> static int
> -virNetDevFeatureAvailable(const char *ifname, struct ethtool_value *cmd)
> +virNetDevSendEthtoolIoctl(const char *ifname, void *cmd)
> {
> int ret = -1;
> int sock = -1;
> @@ -2969,9 +3041,9 @@ virNetDevFeatureAvailable(const char *ifname, struct ethtool_value *cmd)
>
> memset(&ifr, 0, sizeof(ifr));
> strcpy(ifr.ifr_name, ifname);
> - ifr.ifr_data = (void*) cmd;
> -
> - if (ioctl(sock, SIOCETHTOOL, &ifr) != 0) {
> + ifr.ifr_data = cmd;
> + ret = ioctl(sock, SIOCETHTOOL, &ifr);
> + if (ret != 0) {
> switch (errno) {
> case EPERM:
> VIR_DEBUG("ethtool ioctl: permission denied");
> @@ -2988,11 +3060,51 @@ virNetDevFeatureAvailable(const char *ifname, struct ethtool_value *cmd)
> }
> }
>
> - ret = cmd->data > 0 ? 1: 0;
> cleanup:
> if (sock)
> VIR_FORCE_CLOSE(sock);
> + return ret;
> +}
>
> +
> +/**
> +* virNetDevFeatureAvailable
> +* This function checks for the availability of a network device feature
> +*
> +* @ifname: name of the interface
> +* @cmd: reference to an ethtool command structure
> +*
> +* Returns 0 if not found, 1 on success, and -1 on failure.
> +*/
> +static int
> +virNetDevFeatureAvailable(const char *ifname, struct ethtool_value *cmd)
> +{
> + int ret = -1;
> +
> + cmd = (void*)cmd;
> + if (!virNetDevSendEthtoolIoctl(ifname, cmd))
> + ret = cmd->data > 0 ? 1: 0;
> + return ret;
> +}
> +
> +
> +/**
> + * virNetDevGFeatureAvailable
> + * This function checks for the availability of a network device gfeature
> + *
> + * @ifname: name of the interface
> + * @cmd: reference to a gfeatures ethtool command structure
> + *
> + * Returns 0 if not found, 1 on success, and -1 on failure.
> + */
> +static int
> +virNetDevGFeatureAvailable(const char *ifname, struct ethtool_gfeatures *cmd)
> +{
> + int ret = -1;
> +
> + cmd = (void*)cmd;
> + if (!virNetDevSendEthtoolIoctl(ifname, cmd))
> + ret = FEATURE_BIT_IS_SET(cmd->features, TX_UDP_TNL, active);
> return ret;
> }
>
> @@ -3013,7 +3125,7 @@ virNetDevGetFeatures(const char *ifname,
> {
> size_t i = -1;
> struct ethtool_value cmd = { 0 };
> -
> + struct ethtool_gfeatures g_cmd = { 0 };
> struct elem{
> const int cmd;
> const virNetDevFeature feat;
> @@ -3069,6 +3181,15 @@ virNetDevGetFeatures(const char *ifname,
> }
> # endif
>
> +# if HAVE_DECL_ETHTOOL_GFEATURES
make syntax-check would have told you this was off by an extra space.
If you're good with those adjustments, I'll push the patch.
Tks -
John
> + g_cmd.cmd = ETHTOOL_GFEATURES;
> + g_cmd.size = GFEATURES_SIZE;
> + if (virNetDevGFeatureAvailable(ifname, &g_cmd))
> + ignore_value(virBitmapSetBit(*out, VIR_NET_DEV_FEAT_TXUDPTNL));
> +# endif
> +
> + if (virNetDevRDMAFeature(ifname, out))
> + return -1;
> return 0;
> }
> #else
> diff --git a/src/util/virnetdev.h b/src/util/virnetdev.h
> index 190b70e..fff881c 100644
> --- a/src/util/virnetdev.h
> +++ b/src/util/virnetdev.h
> @@ -210,6 +210,7 @@ int virNetDevGetRcvAllMulti(const char *ifname, bool *receive)
> ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2) ATTRIBUTE_RETURN_CHECK;
>
> # define SYSFS_NET_DIR "/sys/class/net/"
> +# define SYSFS_INFINIBAND_DIR "/sys/class/infiniband/"
> int virNetDevSysfsFile(char **pf_sysfs_device_link,
> const char *ifname,
> const char *file)
> diff --git a/tests/nodedevschemadata/net_00_13_02_b9_f9_d3.xml b/tests/nodedevschemadata/net_00_13_02_b9_f9_d3.xml
> index 2a34fed..d4c96e8 100644
> --- a/tests/nodedevschemadata/net_00_13_02_b9_f9_d3.xml
> +++ b/tests/nodedevschemadata/net_00_13_02_b9_f9_d3.xml
> @@ -13,6 +13,8 @@
> <feature name='rxvlan'/>
> <feature name='txvlan'/>
> <feature name='rxhash'/>
> + <feature name='rdma'/>
> + <feature name='txudptnl'/>
> <capability type='80211'/>
> </capability>
> </device>
> diff --git a/tests/nodedevschemadata/net_00_15_58_2f_e9_55.xml b/tests/nodedevschemadata/net_00_15_58_2f_e9_55.xml
> index 81d398c..71bf90e 100644
> --- a/tests/nodedevschemadata/net_00_15_58_2f_e9_55.xml
> +++ b/tests/nodedevschemadata/net_00_15_58_2f_e9_55.xml
> @@ -13,6 +13,8 @@
> <feature name='rxvlan'/>
> <feature name='txvlan'/>
> <feature name='rxhash'/>
> + <feature name='rdma'/>
> + <feature name='txudptnl'/>
> <capability type='80203'/>
> </capability>
> </device>
>
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