From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:54832) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1djnPU-0002um-T1 for qemu-devel@nongnu.org; Mon, 21 Aug 2017 10:10:37 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1djnPQ-0001fq-6r for qemu-devel@nongnu.org; Mon, 21 Aug 2017 10:10:32 -0400 Received: from mx1.redhat.com ([209.132.183.28]:46514) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1djnPQ-0001dR-17 for qemu-devel@nongnu.org; Mon, 21 Aug 2017 10:10:28 -0400 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 17D26C047B82 for ; Mon, 21 Aug 2017 14:10:27 +0000 (UTC) From: Fam Zheng Date: Mon, 21 Aug 2017 22:10:07 +0800 Message-Id: <20170821141008.19383-4-famz@redhat.com> In-Reply-To: <20170821141008.19383-1-famz@redhat.com> References: <20170821141008.19383-1-famz@redhat.com> Subject: [Qemu-devel] [PATCH v4 3/4] scsi: Introduce scsi_sense_buf_to_errno List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Paolo Bonzini 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 --- 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 f894ace4bf..fe330385d8 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 472eb5bea5..472293d59b 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); +} -- 2.13.5