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Feature/nvme list #7

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merged 4 commits into from
Feb 14, 2022
Merged

Feature/nvme list #7

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NVMe list
harshitap26 Feb 11, 2022
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NVME list Changes
harshitap26 Feb 14, 2022
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NVME list Changes
harshitap26 Feb 14, 2022
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NVMe list changes
harshitap26 Feb 14, 2022
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64 changes: 64 additions & 0 deletions gonvme_tcp.go
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Original file line number Diff line number Diff line change
Expand Up @@ -307,6 +307,70 @@ func (nvme *NVMeTCP) nvmeDisonnect(target NVMeTarget) error {
return err
}

// ListNamespaceDevices returns the NVMe namespace Device Paths and each output content
func (nvme *NVMeTCP) ListNamespaceDevices() map[string][]string {
exe := nvme.buildNVMeCommand([]string{"nvme", "list", "-o", "json"})
cmd := exec.Command(exe[0], exe[1:]...)

output, _ := cmd.Output()
str := string(output)
lines := strings.Split(str, "\n")

var devicePaths []string
for _, line := range lines {
line = strings.ReplaceAll(strings.TrimSpace(line), ",", "")

if strings.HasPrefix(line, "\"DevicePath\"") {
devicePath := strings.ReplaceAll(strings.TrimSpace(strings.Split(line, ":")[1]), "\"", "")
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devicePaths = append(devicePaths, devicePath)
}
}

namespaceDevices := make(map[string][]string)

for _, devicePath := range devicePaths {

exe := nvme.buildNVMeCommand([]string{"nvme", "list-ns", devicePath})
cmd := exec.Command(exe[0], exe[1:]...)
output, _ := cmd.Output()

str := string(output)
lines := strings.Split(str, "\n")

var namespaceDevice []string
for _, line := range lines {
line = strings.TrimSpace(line)
if line != "" {
nsDevice := strings.Split(line, ":")[1]
namespaceDevice = append(namespaceDevice, nsDevice)
}
}
namespaceDevices[devicePath] = namespaceDevice
}
return namespaceDevices
}

// GetNamespaceData returns the information of namespace specific to the namespace Id
func (nvme *NVMeTCP) GetNamespaceData(path string, namespaceID string) (string, error) {

var nguid string

exe := nvme.buildNVMeCommand([]string{"nvme", "id-ns", path, "--namespace", namespaceID})
cmd := exec.Command(exe[0], exe[1:]...)

output, error := cmd.Output()
str := string(output)
lines := strings.Split(str, "\n")

for _, line := range lines {
if strings.HasPrefix(line, "nguid") {
nguid = strings.TrimSpace(strings.Split(line, ":")[1])
return nguid, nil
}
}
return nguid, error
}

// GetSessions queries information about NVMe sessions
func (nvme *NVMeTCP) GetSessions() ([]NVMESession, error) {
exe := nvme.buildNVMeCommand([]string{"nvme", "list-subsys", "-o", "json"})
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