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chore: class_fibrechannel: support optional attributes #607

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Mar 5, 2024
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5 changes: 5 additions & 0 deletions sysfs/class_fibrechannel.go
Original file line number Diff line number Diff line change
Expand Up @@ -93,6 +93,11 @@ func (fs FS) parseFibreChannelHost(name string) (*FibreChannelHost, error) {
name := filepath.Join(path, f)
value, err := util.SysReadFile(name)
if err != nil {
// drivers can choose not to expose some attributes to sysfs.
// See: https://github.com/prometheus/node_exporter/issues/2919.
if os.IsNotExist(err) {
continue
}
return nil, fmt.Errorf("failed to read file %q: %w", name, err)
}

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20 changes: 20 additions & 0 deletions sysfs/class_fibrechannel_test.go
Original file line number Diff line number Diff line change
Expand Up @@ -64,6 +64,26 @@ func TestFibreChannelClass(t *testing.T) {
FCPPacketAborts: 0x13,
},
},
"host1": FibreChannelHost{
Name: "host1",
PortState: "Online",
Counters: FibreChannelCounters{
DumpedFrames: 0,
ErrorFrames: ^uint64(0),
InvalidCRCCount: 0x20,
RXFrames: 0x30,
RXWords: 0x40,
TXFrames: 0x50,
TXWords: 0x60,
SecondsSinceLastReset: 0x70,
InvalidTXWordCount: 0x80,
LinkFailureCount: 0x90,
LossOfSyncCount: 0x100,
LossOfSignalCount: 0x110,
NosCount: 0x120,
FCPPacketAborts: 0x130,
},
},
}

if diff := cmp.Diff(want, got); diff != "" {
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81 changes: 81 additions & 0 deletions testdata/fixtures.ttar
Original file line number Diff line number Diff line change
Expand Up @@ -5068,6 +5068,87 @@ Lines: 1
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