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sgutils2: support RequestSense Descriptor format

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This commit is contained in:
Dietmar Maurer 2021-01-26 13:38:16 +01:00
parent e1740f3f01
commit a223458753
1 changed files with 40 additions and 15 deletions
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49
src/tools/sgutils2.rs
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@ -3,6 +3,8 @@
//! Incomplete, but we currently do not need more.
//!
//! See: `/usr/include/scsi/sg_pt.h`
//!
//! The SCSI Commands Reference Manual also contains some usefull information.
use std::os::unix::io::AsRawFd;
use std::ptr::NonNull;
@ -268,7 +270,7 @@ struct InquiryPage {
#[repr(C, packed)]
#[derive(Endian, Debug)]
struct RequestSensePage {
struct RequestSenseFixed {
response_code: u8,
obsolete: u8,
flags2: u8,
@ -281,6 +283,17 @@ struct RequestSensePage {
sense_key_specific: [u8; 3],
}
#[repr(C, packed)]
#[derive(Endian, Debug)]
struct RequestSenseDescriptor{
response_code: u8,
sense_key: u8,
additional_sense_code: u8,
additional_sense_code_qualifier: u8,
reserved: [u8;4],
additional_sense_len: u8,
}
/// Inquiry result
#[derive(Serialize, Deserialize, Debug)]
pub struct InquiryInfo {
@ -477,22 +490,34 @@ impl <'a, F: AsRawFd> SgRaw<'a, F> {
if sense_len == 0 {
return Err(format_err!("scsi command failed: no Sense").into());
}
let code = self.sense_buffer[0] & 0x7f;
let mut reader = &self.sense_buffer[..(sense_len as usize)];
let sense: RequestSensePage = unsafe { reader.read_be_value()? };
let code = sense.response_code & 0x7f;
if code == 0x71 {
return Err(format_err!("scsi command failed: received deferred Sense").into());
}
if code != 0x70 {
return Err(format_err!("scsi command failed: invalid Sense response code {:x}", code).into());
}
let sense = SenseInfo {
let sense = match code {
0x70 => {
let sense: RequestSenseFixed = unsafe { reader.read_be_value()? };
SenseInfo {
sense_key: sense.flags2 & 0xf,
asc: sense.additional_sense_code,
ascq: sense.additional_sense_code_qualifier,
}
}
0x72 => {
let sense: RequestSenseDescriptor = unsafe { reader.read_be_value()? };
SenseInfo {
sense_key: sense.sense_key & 0xf,
asc: sense.additional_sense_code,
ascq: sense.additional_sense_code_qualifier,
}
}
0x71 | 0x73 => {
return Err(format_err!("scsi command failed: received deferred Sense").into());
}
unknown => {
return Err(format_err!("scsi command failed: invalid Sense response code {:x}", unknown).into());
}
};
return Err(ScsiError {