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util: skip RDMA detection for non-PCI network devices

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Only PCI devices have '/sys/class/net/<ifname>/device/resource' so we
need to skip this check for all other network devices.

Without this patch and RDMA enabled libvirt will not detect any network
device that doesn't have the path above which includes 'lo', 'virbr',
'tun', etc.

Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1639258

Reviewed-by: Andrea Bolognani <abologna@redhat.com>
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
This commit is contained in:
Pavel Hrdina 2019-03-07 17:52:55 +01:00
parent e387afeb9a
commit f38ef0fac0
1 changed files with 7 additions and 1 deletions
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8
src/util/virnetdev.c
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@ -2914,8 +2914,14 @@ virNetDevRDMAFeature(const char *ifname,
if (virAsprintf(&eth_devpath, SYSFS_NET_DIR "%s/device/resource", ifname) < 0)
goto cleanup;
if (!virFileExists(eth_devpath))
/* If /sys/class/net/<ifname>/device/resource doesn't exist it is not a PCI
* device and therefore it will not have RDMA. */
if (!virFileExists(eth_devpath)) {
ret = 0;
goto cleanup;
}
if (virFileReadAll(eth_devpath, RESOURCE_FILE_LEN, &eth_res_buf) < 0)
goto cleanup;