sgutils2: add scsi_inquiry command
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@ -6,8 +6,11 @@
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use std::os::unix::io::AsRawFd;
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use anyhow::{bail, Error};
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use anyhow::{bail, format_err, Error};
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use libc::{c_char, c_int};
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use endian_trait::Endian;
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use proxmox::tools::io::ReadExt;
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// Opaque wrapper for sg_pt_base
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#[repr(C)]
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@ -19,6 +22,76 @@ impl Drop for SgPtBase {
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}
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}
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/// Peripheral device type text (see `inquiry` command)
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///
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/// see [https://en.wikipedia.org/wiki/SCSI_Peripheral_Device_Type]
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pub const PERIPHERAL_DEVICE_TYPE_TEXT: [&'static str; 32] = [
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"Disk Drive",
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"Tape Drive",
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"Printer",
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"Processor",
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"Write-once",
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"CD-ROM", // 05h
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"Scanner",
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"Optical",
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"Medium Changer", // 08h
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"Communications",
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"ASC IT8",
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"ASC IT8",
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"RAID Array",
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"Enclosure Services",
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"Simplified direct-access",
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"Optical card reader/writer",
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"Bridging Expander",
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"Object-based Storage",
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"Automation/Drive Interface",
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"Security manager",
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"Reserved",
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"Reserved",
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"Reserved",
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"Reserved",
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"Reserved",
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"Reserved",
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"Reserved",
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"Reserved",
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"Reserved",
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"Reserved",
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"Reserved",
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"Unknown",
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];
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#[repr(C, packed)]
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#[derive(Endian)]
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struct InquiryPage {
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peripheral_type: u8,
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rmb: u8,
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version: u8,
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flags3: u8,
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additional_length: u8,
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flags5: u8,
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flags6: u8,
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flags7: u8,
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vendor: [u8; 8],
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product: [u8; 16],
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revision: [u8; 4],
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// additional data follows, but we do not need that
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}
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/// Inquiry result
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#[derive(Debug)]
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pub struct InquiryInfo {
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/// Peripheral device type (0-31)
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pub peripheral_type: u8,
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/// Peripheral device type as string
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pub peripheral_type_text: String,
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/// Vendor
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pub vendor: String,
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/// Product
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pub product: String,
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/// Revision
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pub revision: String,
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}
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pub const SCSI_PT_RESULT_GOOD:c_int = 0;
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pub const SCSI_PT_RESULT_STATUS:c_int = 1;
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pub const SCSI_PT_RESULT_SENSE:c_int = 2;
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@ -27,7 +100,7 @@ pub const SCSI_PT_RESULT_OS_ERR:c_int = 4;
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#[link(name = "sgutils2")]
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extern {
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#[allow(dead_code)]
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fn scsi_pt_open_device(
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device_name: * const c_char,
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@ -276,3 +349,49 @@ impl <'a, F: AsRawFd> SgRaw<'a, F> {
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Ok(())
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}
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}
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// Useful helpers
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/// Converts SCSI ASCII text into String, trim zero and spaces
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pub fn scsi_ascii_to_string(data: &[u8]) -> String {
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String::from_utf8_lossy(data)
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.trim_matches(char::from(0))
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.trim()
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.to_string()
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}
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/// Read SCSI Inquiry page
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///
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/// Returns Product/Vendor/Revision and device type.
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pub fn scsi_inquiry<F: AsRawFd>(
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file: &mut F,
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) -> Result<InquiryInfo, Error> {
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let allocation_len: u8 = u8::MAX;
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let mut sg_raw = SgRaw::new(file, allocation_len as usize)?;
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sg_raw.set_timeout(30); // use short timeout
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let mut cmd = Vec::new();
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cmd.extend(&[0x12, 0, 0, 0, allocation_len, 0]); // INQUIRY
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let data = sg_raw.do_command(&cmd)
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.map_err(|err| format_err!("SCSI inquiry failed - {}", err))?;
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proxmox::try_block!({
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let mut reader = &data[..];
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let page: InquiryPage = unsafe { reader.read_be_value()? };
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let peripheral_type = page.peripheral_type & 31;
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let info = InquiryInfo {
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peripheral_type,
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peripheral_type_text: PERIPHERAL_DEVICE_TYPE_TEXT[peripheral_type as usize].to_string(),
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vendor: scsi_ascii_to_string(&page.vendor),
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product: scsi_ascii_to_string(&page.product),
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revision: scsi_ascii_to_string(&page.revision),
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};
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Ok(info)
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}).map_err(|err: Error| format_err!("decode inquiry page failed - {}", err))
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}
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