[release-5.0] OCPBUGS-112719: cherry-pick 24c6dce279c418bcb911824e8c8be1c81a1e832b - Fix fibrechannel_linux for ppc64le (#3769) - #185
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Seen on a master node: ``` panic: runtime error: invalid memory address or nil pointer dereference [signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0x106cefa4] goroutine 81 [running]: github.com/prometheus/node_exporter/collector.(*fibrechannelCollector).Update(0x7e28c1ae20f0, 0x7e28c1826770) /go/src/github.com/prometheus/node_exporter/collector/fibrechannel_linux.go:133 +0x604 sh-5.1# ls -l /host/sys/class/fc_host/ total 0 lrwxrwxrwx. 1 root root 0 Jul 30 20:42 host1 -> ../../devices/vio/30000003/host1/fc_host/host1 lrwxrwxrwx. 1 root root 0 Jul 30 20:42 host2 -> ../../devices/vio/30000005/host2/fc_host/host2 sh-5.1# ls -l /host/sys/class/fc_host/host1/ total 0 -rw-r--r--. 1 root root 65536 Jul 30 20:09 dev_loss_tmo lrwxrwxrwx. 1 root root 0 Jul 30 20:42 device -> ../../../host1 -r--r--r--. 1 root root 65536 Jul 30 20:09 fabric_name --w-------. 1 root root 65536 Jul 30 20:42 issue_lip -r--r--r--. 1 root root 65536 Jul 30 20:42 maxframe_size -r--r--r--. 1 root root 65536 Jul 30 20:09 node_name -r--r--r--. 1 root root 65536 Jul 30 20:09 port_id -r--r--r--. 1 root root 65536 Jul 30 20:42 port_name -r--r--r--. 1 root root 65536 Jul 30 20:09 port_state -r--r--r--. 1 root root 65536 Jul 30 20:09 port_type drwxr-xr-x. 2 root root 0 Jul 30 20:42 power -r--r--r--. 1 root root 65536 Jul 30 20:09 speed lrwxrwxrwx. 1 root root 0 Jul 30 20:42 subsystem -> ../../../../../../class/fc_host -r--r--r--. 1 root root 65536 Jul 30 20:09 supported_classes -rw-r--r--. 1 root root 65536 Jul 30 20:42 tgtid_bind_type -rw-r--r--. 1 root root 65536 Jul 30 20:42 uevent ``` Since many filenames for counters are not guaranteed to exist in VMs, allocate if not present. Signed-off-by: Mark Hamzy <hamzy@us.ibm.com>
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@openshift-cherrypick-robot: Jira Issue OCPBUGS-100376 has been cloned as Jira Issue OCPBUGS-112719. Will retitle bug to link to clone. DetailsIn response to this:
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@openshift-cherrypick-robot: This pull request references Jira Issue OCPBUGS-112719, which is invalid:
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This is an automated cherry-pick of #184
/assign prb112