From f635140407bf6d024045ad18e7a1f8f802690b36 Mon Sep 17 00:00:00 2001 From: Paolo Bonzini Date: Sat, 2 Dec 2017 12:19:42 +0100 Subject: [PATCH 16/36] scsi: Introduce scsi_sense_buf_to_errno RH-Author: Paolo Bonzini Message-id: <20171202121953.13317-7-pbonzini@redhat.com> Patchwork-id: 78082 O-Subject: [RHEL7.4 qemu-kvm-rhev PATCH 06/17] scsi: Introduce scsi_sense_buf_to_errno Bugzilla: 1464908 RH-Acked-by: Stefan Hajnoczi RH-Acked-by: Dr. David Alan Gilbert RH-Acked-by: John Snow From: Fam Zheng This recognizes the "fixed" and "descriptor" format sense data, extracts the sense key/asc/ascq fields then converts them to an errno. Signed-off-by: Fam Zheng Message-Id: <20170821141008.19383-4-famz@redhat.com> Signed-off-by: Paolo Bonzini (cherry picked from commit a485b23425c755867d6caa6ab590be4e0473e35a) Signed-off-by: Miroslav Rezanina --- include/scsi/scsi.h | 1 + util/scsi.c | 30 ++++++++++++++++++++++++++++++ 2 files changed, 31 insertions(+) diff --git a/include/scsi/scsi.h b/include/scsi/scsi.h index f894ace..fe33038 100644 --- a/include/scsi/scsi.h +++ b/include/scsi/scsi.h @@ -15,5 +15,6 @@ #define QEMU_SCSI_H int scsi_sense_to_errno(int key, int asc, int ascq); +int scsi_sense_buf_to_errno(const uint8_t *sense, size_t sense_size); #endif diff --git a/util/scsi.c b/util/scsi.c index 472eb5b..472293d 100644 --- a/util/scsi.c +++ b/util/scsi.c @@ -58,3 +58,33 @@ int scsi_sense_to_errno(int key, int asc, int ascq) return EIO; } } + +int scsi_sense_buf_to_errno(const uint8_t *sense, size_t sense_size) +{ + int key, asc, ascq; + if (sense_size < 1) { + return EIO; + } + switch (sense[0]) { + case 0x70: /* Fixed format sense data. */ + if (sense_size < 14) { + return EIO; + } + key = sense[2] & 0xF; + asc = sense[12]; + ascq = sense[13]; + break; + case 0x72: /* Descriptor format sense data. */ + if (sense_size < 4) { + return EIO; + } + key = sense[1] & 0xF; + asc = sense[2]; + ascq = sense[3]; + break; + default: + return EIO; + break; + } + return scsi_sense_to_errno(key, asc, ascq); +} -- 1.8.3.1