From: Luben Tuikov <luben@splentec.com>
To: linux-scsi <linux-scsi@vger.kernel.org>,
linux-kernel <linux-kernel@vger.kernel.org>
Subject: [PATCH] scsi: extracting the sense key, ASC and ASCQ
Date: Wed, 13 Nov 2002 16:32:08 -0500 [thread overview]
Message-ID: <3DD2C4D8.4E8B7A7D@splentec.com> (raw)
... testing the descriptor format sense data...
long story short:
This patch teaches SCSI core to use get_sense_key(),
get_asc() and get_ascq() to obtain the sense key,
ASC and ASCQ respectively, from the sense buffer.
(similarly to host_byte, driver_byte(), etc also
found in scsi.h)
A check is also made to make sure that the additional
length in the sense data spans ASC and ASCQ bytes;
Also descriptor format sense data is now supported
transparently (DESC bit in REQUEST SENSE...).
This is a cosmetic patch.
--
Luben
diff -Nru -X /usr/src/dontdiff linux-2.5.47/drivers/scsi/scsi.c linux/drivers/scsi/scsi.c
--- linux-2.5.47/drivers/scsi/scsi.c Sun Nov 10 22:28:16 2002
+++ linux/drivers/scsi/scsi.c Wed Nov 13 14:00:51 2002
@@ -2257,7 +2257,7 @@
SCpnt->internal_timeout,
SCpnt->cmnd[0],
- SCpnt->sense_buffer[2],
+ get_sense_key(SCpnt->sense_buffer),
SCpnt->result);
}
}
diff -Nru -X /usr/src/dontdiff linux-2.5.47/drivers/scsi/scsi.h linux/drivers/scsi/scsi.h
--- linux-2.5.47/drivers/scsi/scsi.h Sun Nov 10 22:28:06 2002
+++ linux/drivers/scsi/scsi.h Wed Nov 13 13:55:52 2002
@@ -133,6 +133,33 @@
#define sense_error(sense) ((sense) & 0xf)
#define sense_valid(sense) ((sense) & 0x80);
+/* Support for descriptor format sense data.
+ */
+static inline u8 get_sense_key(unsigned char *sense_buf)
+{
+ return (sense_buf[0]&2) ? sense_buf[1]&0xf : sense_buf[2]&0xf;
+}
+
+static inline u8 get_asc(unsigned char *sense_buf)
+{
+ if (sense_buf[0]&2)
+ return sense_buf[2];
+ else if (sense_buf[7]>4)
+ return sense_buf[12];
+ else
+ return 0;
+}
+
+static inline u8 get_ascq(unsigned char *sense_buf)
+{
+ if (sense_buf[0]&2)
+ return sense_buf[3];
+ else if (sense_buf[7]>5)
+ return sense_buf[13];
+ else
+ return 0;
+}
+
#define NEEDS_RETRY 0x2001
#define SUCCESS 0x2002
#define FAILED 0x2003
diff -Nru -X /usr/src/dontdiff linux-2.5.47/drivers/scsi/scsi_error.c linux/drivers/scsi/scsi_error.c
--- linux-2.5.47/drivers/scsi/scsi_error.c Sun Nov 10 22:28:02 2002
+++ linux/drivers/scsi/scsi_error.c Wed Nov 13 14:04:24 2002
@@ -299,13 +299,15 @@
**/
static int scsi_check_sense(Scsi_Cmnd *scmd)
{
+ u8 sense_key = get_sense_key(scmd->sense_buffer);
+ u8 asc = get_asc(scmd->sense_buffer);
+ u8 ascq = get_ascq(scmd->sense_buffer);
+
if (!SCSI_SENSE_VALID(scmd)) {
return FAILED;
}
- if (scmd->sense_buffer[2] & 0xe0)
- return SUCCESS;
- switch (scmd->sense_buffer[2] & 0xf) {
+ switch (sense_key) {
case NO_SENSE:
return SUCCESS;
case RECOVERED_ERROR:
@@ -329,8 +331,7 @@
* if the device is in the process of becoming ready, we
* should retry.
*/
- if ((scmd->sense_buffer[12] == 0x04) &&
- (scmd->sense_buffer[13] == 0x01)) {
+ if (asc == 0x04 && ascq == 0x01) {
return NEEDS_RETRY;
}
return SUCCESS;
diff -Nru -X /usr/src/dontdiff linux-2.5.47/drivers/scsi/scsi_ioctl.c linux/drivers/scsi/scsi_ioctl.c
--- linux-2.5.47/drivers/scsi/scsi_ioctl.c Sun Nov 10 22:28:31 2002
+++ linux/drivers/scsi/scsi_ioctl.c Wed Nov 13 14:06:04 2002
@@ -108,7 +108,7 @@
SCSI_LOG_IOCTL(2, printk("Ioctl returned 0x%x\n", SRpnt->sr_result));
if (driver_byte(SRpnt->sr_result) != 0)
- switch (SRpnt->sr_sense_buffer[2] & 0xf) {
+ switch (get_sense_key(SRpnt->sr_sense_buffer)) {
case ILLEGAL_REQUEST:
if (cmd[0] == ALLOW_MEDIUM_REMOVAL)
dev->lockable = 0;
@@ -134,10 +134,10 @@
dev->id,
dev->lun,
SRpnt->sr_result);
- printk("\tSense class %x, sense error %x, extended sense %x\n",
+ printk("\tSense class %x, sense error %x, sense key %x\n",
sense_class(SRpnt->sr_sense_buffer[0]),
sense_error(SRpnt->sr_sense_buffer[0]),
- SRpnt->sr_sense_buffer[2] & 0xf);
+ get_sense_key(SRpnt->sr_sense_buffer));
}
diff -Nru -X /usr/src/dontdiff linux-2.5.47/drivers/scsi/scsi_lib.c linux/drivers/scsi/scsi_lib.c
--- linux-2.5.47/drivers/scsi/scsi_lib.c Sun Nov 10 22:28:14 2002
+++ linux/drivers/scsi/scsi_lib.c Wed Nov 13 14:14:52 2002
@@ -581,17 +581,17 @@
}
#endif
}
- if ((SCpnt->sense_buffer[0] & 0x7f) == 0x70) {
+ if (SCSI_SENSE_VALID(SCpnt)) {
/*
* If the device is in the process of becoming ready,
* retry.
*/
- if (SCpnt->sense_buffer[12] == 0x04 &&
- SCpnt->sense_buffer[13] == 0x01) {
+ if (get_asc(SCpnt->sense_buffer) == 0x04 &&
+ get_ascq(SCpnt->sense_buffer) == 0x01) {
scsi_queue_next_request(q, SCpnt);
return;
}
- if ((SCpnt->sense_buffer[2] & 0xf) == UNIT_ATTENTION) {
+ if (get_sense_key(SCpnt->sense_buffer) == UNIT_ATTENTION) {
if (SCpnt->device->removable) {
/* detected disc change. set a bit
* and quietly refuse further access.
@@ -618,7 +618,7 @@
* past the end of the disk.
*/
- switch (SCpnt->sense_buffer[2]) {
+ switch (get_sense_key(SCpnt->sense_buffer)) {
case ILLEGAL_REQUEST:
if (SCpnt->device->ten) {
SCpnt->device->ten = 0;
diff -Nru -X /usr/src/dontdiff linux-2.5.47/drivers/scsi/scsi_scan.c linux/drivers/scsi/scsi_scan.c
--- linux-2.5.47/drivers/scsi/scsi_scan.c Sun Nov 10 22:28:29 2002
+++ linux/drivers/scsi/scsi_scan.c Wed Nov 13 14:10:20 2002
@@ -1205,9 +1205,9 @@
if (sreq->sr_result) {
if ((driver_byte(sreq->sr_result) & DRIVER_SENSE) != 0 &&
- (sreq->sr_sense_buffer[2] & 0xf) == UNIT_ATTENTION &&
- sreq->sr_sense_buffer[12] == 0x28 &&
- sreq->sr_sense_buffer[13] == 0) {
+ get_sense_key(sreq->sr_sense_buffer) == UNIT_ATTENTION &&
+ get_asc(sreq->sr_sense_buffer) == 0x28 &&
+ get_ascq(sreq->sr_sense_buffer) == 0) {
/* not-ready to ready transition - good */
/* dpg: bogus? INQUIRY never returns UNIT_ATTENTION */
} else
@@ -1830,7 +1830,7 @@
? "failed" : "successful", retries,
sreq->sr_result));
if (sreq->sr_result == 0
- || sreq->sr_sense_buffer[2] != UNIT_ATTENTION)
+ || get_sense_key(sreq->sr_sense_buffer) != UNIT_ATTENTION)
break;
}
scsi_release_commandblocks(sdevscan);
diff -Nru -X /usr/src/dontdiff linux-2.5.47/drivers/scsi/scsiiom.c linux/drivers/scsi/scsiiom.c
--- linux-2.5.47/drivers/scsi/scsiiom.c Sun Nov 10 22:28:03 2002
+++ linux/drivers/scsi/scsiiom.c Wed Nov 13 14:12:01 2002
@@ -1380,7 +1380,7 @@
pSRB->AdaptStatus = 0;
pSRB->TargetStatus = CHECK_CONDITION << 1;
#ifdef DC390_REMOVABLEDEBUG
- switch (pcmd->sense_buffer[2] & 0x0f)
+ switch (get_sense_key(pcmd->sense_buffer))
{
case NOT_READY: printk (KERN_INFO "DC390: ReqSense: NOT_READY (Cmnd = 0x%02x, Dev = %i-%i, Stat = %i, Scan =
%i)\n",
pcmd->cmnd[0], pDCB->TargetID, pDCB->TargetLUN,
@@ -1584,8 +1584,8 @@
else printk ("\n");
#endif
if( (host_byte(pcmd->result) != DID_OK && !(status_byte(pcmd->result) & CHECK_CONDITION) &&
!(status_byte(pcmd->result) & BUSY)) ||
- ((driver_byte(pcmd->result) & DRIVER_SENSE) && (pcmd->sense_buffer[0] & 0x70) == 0x70 &&
- (pcmd->sense_buffer[2] & 0xf) == ILLEGAL_REQUEST) || host_byte(pcmd->result) & DID_ERROR )
+ ((driver_byte(pcmd->result) & DRIVER_SENSE) && SCSI_SENSE_VALID(pcmd->sense_buffer) &&
+ get_sense_key(pcmd->sense_buffer) == ILLEGAL_REQUEST) || host_byte(pcmd->result) & DID_ERROR )
{
/* device not present: remove */
//dc390_Going_remove (pDCB, pSRB);
next reply other threads:[~2002-11-13 21:25 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-11-13 21:32 Luben Tuikov [this message]
2002-11-13 21:49 ` [PATCH] scsi: extracting the sense key, ASC and ASCQ Luben Tuikov
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