From: Hannes Reinecke <h...@suse.de>
Switch to scsi_execute_req_flags() and scsi_get_vpd_page() instead of
open-coding it. Using scsi_execute_req_flags() will set REQ_QUIET and
REQ_PREEMPT, but this is okay as we're evaluating the errors anyway and
should be able to send the command even if the device is quiesced.
Signed-off-by: Hannes Reinecke <h...@suse.com>
Signed-off-by: Christoph Hellwig <h...@lst.de>
---
drivers/scsi/device_handler/scsi_dh_emc.c | 247 +++++++-----------------------
1 file changed, 56 insertions(+), 191 deletions(-)
diff --git a/drivers/scsi/device_handler/scsi_dh_emc.c
b/drivers/scsi/device_handler/scsi_dh_emc.c
index 5b80746..4a7679f 100644
--- a/drivers/scsi/device_handler/scsi_dh_emc.c
+++ b/drivers/scsi/device_handler/scsi_dh_emc.c
@@ -88,12 +88,6 @@ struct clariion_dh_data {
*/
unsigned char buffer[CLARIION_BUFFER_SIZE];
/*
- * SCSI sense buffer for commands -- assumes serial issuance
- * and completion sequence of all commands for same multipath.
- */
- unsigned char sense[SCSI_SENSE_BUFFERSIZE];
- unsigned int senselen;
- /*
* LUN state
*/
int lun_state;
@@ -116,44 +110,38 @@ struct clariion_dh_data {
/*
* Parse MODE_SELECT cmd reply.
*/
-static int trespass_endio(struct scsi_device *sdev, char *sense)
+static int trespass_endio(struct scsi_device *sdev,
+ struct scsi_sense_hdr *sshdr)
{
int err = SCSI_DH_IO;
- struct scsi_sense_hdr sshdr;
-
- if (!scsi_normalize_sense(sense, SCSI_SENSE_BUFFERSIZE, &sshdr)) {
- sdev_printk(KERN_ERR, sdev, "%s: Found valid sense data 0x%2x, "
- "0x%2x, 0x%2x while sending CLARiiON trespass "
- "command.\n", CLARIION_NAME, sshdr.sense_key,
- sshdr.asc, sshdr.ascq);
- if ((sshdr.sense_key == 0x05) && (sshdr.asc == 0x04) &&
- (sshdr.ascq == 0x00)) {
- /*
- * Array based copy in progress -- do not send
- * mode_select or copy will be aborted mid-stream.
- */
- sdev_printk(KERN_INFO, sdev, "%s: Array Based Copy in "
- "progress while sending CLARiiON trespass "
- "command.\n", CLARIION_NAME);
- err = SCSI_DH_DEV_TEMP_BUSY;
- } else if ((sshdr.sense_key == 0x02) && (sshdr.asc == 0x04) &&
- (sshdr.ascq == 0x03)) {
- /*
- * LUN Not Ready - Manual Intervention Required
- * indicates in-progress ucode upgrade (NDU).
- */
- sdev_printk(KERN_INFO, sdev, "%s: Detected in-progress "
- "ucode upgrade NDU operation while sending "
- "CLARiiON trespass command.\n",
CLARIION_NAME);
- err = SCSI_DH_DEV_TEMP_BUSY;
- } else
- err = SCSI_DH_DEV_FAILED;
- } else {
- sdev_printk(KERN_INFO, sdev,
- "%s: failed to send MODE SELECT, no sense
available\n",
- CLARIION_NAME);
- }
+ sdev_printk(KERN_ERR, sdev, "%s: Found valid sense data 0x%2x, "
+ "0x%2x, 0x%2x while sending CLARiiON trespass "
+ "command.\n", CLARIION_NAME, sshdr->sense_key,
+ sshdr->asc, sshdr->ascq);
+
+ if (sshdr->sense_key == 0x05 && sshdr->asc == 0x04 &&
+ sshdr->ascq == 0x00) {
+ /*
+ * Array based copy in progress -- do not send
+ * mode_select or copy will be aborted mid-stream.
+ */
+ sdev_printk(KERN_INFO, sdev, "%s: Array Based Copy in "
+ "progress while sending CLARiiON trespass "
+ "command.\n", CLARIION_NAME);
+ err = SCSI_DH_DEV_TEMP_BUSY;
+ } else if (sshdr->sense_key == 0x02 && sshdr->asc == 0x04 &&
+ sshdr->ascq == 0x03) {
+ /*
+ * LUN Not Ready - Manual Intervention Required
+ * indicates in-progress ucode upgrade (NDU).
+ */
+ sdev_printk(KERN_INFO, sdev, "%s: Detected in-progress "
+ "ucode upgrade NDU operation while sending "
+ "CLARiiON trespass command.\n", CLARIION_NAME);
+ err = SCSI_DH_DEV_TEMP_BUSY;
+ } else
+ err = SCSI_DH_DEV_FAILED;
return err;
}
@@ -257,103 +245,15 @@ static char * parse_sp_model(struct scsi_device *sdev,
unsigned char *buffer)
return sp_model;
}
-/*
- * Get block request for REQ_BLOCK_PC command issued to path. Currently
- * limited to MODE_SELECT (trespass) and INQUIRY (VPD page 0xC0) commands.
- *
- * Uses data and sense buffers in hardware handler context structure and
- * assumes serial servicing of commands, both issuance and completion.
- */
-static struct request *get_req(struct scsi_device *sdev, int cmd,
- unsigned char *buffer)
-{
- struct request *rq;
- int len = 0;
-
- rq = blk_get_request(sdev->request_queue,
- (cmd != INQUIRY) ? WRITE : READ, GFP_NOIO);
- if (IS_ERR(rq)) {
- sdev_printk(KERN_INFO, sdev, "get_req: blk_get_request failed");
- return NULL;
- }
-
- blk_rq_set_block_pc(rq);
- rq->cmd_len = COMMAND_SIZE(cmd);
- rq->cmd[0] = cmd;
-
- switch (cmd) {
- case MODE_SELECT:
- len = sizeof(short_trespass);
- rq->cmd[1] = 0x10;
- rq->cmd[4] = len;
- break;
- case MODE_SELECT_10:
- len = sizeof(long_trespass);
- rq->cmd[1] = 0x10;
- rq->cmd[8] = len;
- break;
- case INQUIRY:
- len = CLARIION_BUFFER_SIZE;
- rq->cmd[4] = len;
- memset(buffer, 0, len);
- break;
- default:
- BUG_ON(1);
- break;
- }
-
- rq->cmd_flags |= REQ_FAILFAST_DEV | REQ_FAILFAST_TRANSPORT |
- REQ_FAILFAST_DRIVER;
- rq->timeout = CLARIION_TIMEOUT;
- rq->retries = CLARIION_RETRIES;
-
- if (blk_rq_map_kern(rq->q, rq, buffer, len, GFP_NOIO)) {
- blk_put_request(rq);
- return NULL;
- }
-
- return rq;
-}
-
-static int send_inquiry_cmd(struct scsi_device *sdev, int page,
- struct clariion_dh_data *csdev)
-{
- struct request *rq = get_req(sdev, INQUIRY, csdev->buffer);
- int err;
-
- if (!rq)
- return SCSI_DH_RES_TEMP_UNAVAIL;
-
- rq->sense = csdev->sense;
- memset(rq->sense, 0, SCSI_SENSE_BUFFERSIZE);
- rq->sense_len = csdev->senselen = 0;
-
- rq->cmd[0] = INQUIRY;
- if (page != 0) {
- rq->cmd[1] = 1;
- rq->cmd[2] = page;
- }
- err = blk_execute_rq(sdev->request_queue, NULL, rq, 1);
- if (err == -EIO) {
- sdev_printk(KERN_INFO, sdev,
- "%s: failed to send %s INQUIRY: %x\n",
- CLARIION_NAME, page?"EVPD":"standard",
- rq->errors);
- csdev->senselen = rq->sense_len;
- err = SCSI_DH_IO;
- }
-
- blk_put_request(rq);
-
- return err;
-}
-
static int send_trespass_cmd(struct scsi_device *sdev,
struct clariion_dh_data *csdev)
{
- struct request *rq;
unsigned char *page22;
- int err, len, cmd;
+ unsigned char cdb[COMMAND_SIZE(MODE_SELECT)];
+ int err, res = SCSI_DH_OK, len;
+ struct scsi_sense_hdr sshdr;
+ u64 req_flags = REQ_FAILFAST_DEV | REQ_FAILFAST_TRANSPORT |
+ REQ_FAILFAST_DRIVER;
if (csdev->flags & CLARIION_SHORT_TRESPASS) {
page22 = short_trespass;
@@ -361,40 +261,37 @@ static int send_trespass_cmd(struct scsi_device *sdev,
/* Set Honor Reservations bit */
page22[6] |= 0x80;
len = sizeof(short_trespass);
- cmd = MODE_SELECT;
+ cdb[0] = MODE_SELECT;
+ cdb[1] = 0x10;
+ cdb[4] = len;
} else {
page22 = long_trespass;
if (!(csdev->flags & CLARIION_HONOR_RESERVATIONS))
/* Set Honor Reservations bit */
page22[10] |= 0x80;
len = sizeof(long_trespass);
- cmd = MODE_SELECT_10;
+ cdb[0] = MODE_SELECT_10;
+ cdb[8] = len;
}
BUG_ON((len > CLARIION_BUFFER_SIZE));
memcpy(csdev->buffer, page22, len);
- rq = get_req(sdev, cmd, csdev->buffer);
- if (!rq)
- return SCSI_DH_RES_TEMP_UNAVAIL;
-
- rq->sense = csdev->sense;
- memset(rq->sense, 0, SCSI_SENSE_BUFFERSIZE);
- rq->sense_len = csdev->senselen = 0;
-
- err = blk_execute_rq(sdev->request_queue, NULL, rq, 1);
- if (err == -EIO) {
- if (rq->sense_len) {
- err = trespass_endio(sdev, csdev->sense);
- } else {
+ err = scsi_execute_req_flags(sdev, cdb, DMA_TO_DEVICE,
+ csdev->buffer, len, &sshdr,
+ CLARIION_TIMEOUT * HZ, CLARIION_RETRIES,
+ NULL, req_flags, 0);
+ if (err) {
+ if (scsi_sense_valid(&sshdr))
+ res = trespass_endio(sdev, &sshdr);
+ else {
sdev_printk(KERN_INFO, sdev,
"%s: failed to send MODE SELECT: %x\n",
- CLARIION_NAME, rq->errors);
+ CLARIION_NAME, err);
+ res = SCSI_DH_IO;
}
}
- blk_put_request(rq);
-
- return err;
+ return res;
}
static int clariion_check_sense(struct scsi_device *sdev,
@@ -464,21 +361,7 @@ static int clariion_std_inquiry(struct scsi_device *sdev,
int err;
char *sp_model;
- err = send_inquiry_cmd(sdev, 0, csdev);
- if (err != SCSI_DH_OK && csdev->senselen) {
- struct scsi_sense_hdr sshdr;
-
- if (scsi_normalize_sense(csdev->sense, SCSI_SENSE_BUFFERSIZE,
- &sshdr)) {
- sdev_printk(KERN_ERR, sdev, "%s: INQUIRY sense code "
- "%02x/%02x/%02x\n", CLARIION_NAME,
- sshdr.sense_key, sshdr.asc, sshdr.ascq);
- }
- err = SCSI_DH_IO;
- goto out;
- }
-
- sp_model = parse_sp_model(sdev, csdev->buffer);
+ sp_model = parse_sp_model(sdev, sdev->inquiry);
if (!sp_model) {
err = SCSI_DH_DEV_UNSUPP;
goto out;
@@ -500,30 +383,12 @@ static int clariion_std_inquiry(struct scsi_device *sdev,
static int clariion_send_inquiry(struct scsi_device *sdev,
struct clariion_dh_data *csdev)
{
- int err, retry = CLARIION_RETRIES;
-
-retry:
- err = send_inquiry_cmd(sdev, 0xC0, csdev);
- if (err != SCSI_DH_OK && csdev->senselen) {
- struct scsi_sense_hdr sshdr;
-
- err = scsi_normalize_sense(csdev->sense, SCSI_SENSE_BUFFERSIZE,
- &sshdr);
- if (!err)
- return SCSI_DH_IO;
-
- err = clariion_check_sense(sdev, &sshdr);
- if (retry > 0 && err == ADD_TO_MLQUEUE) {
- retry--;
- goto retry;
- }
- sdev_printk(KERN_ERR, sdev, "%s: INQUIRY sense code "
- "%02x/%02x/%02x\n", CLARIION_NAME,
- sshdr.sense_key, sshdr.asc, sshdr.ascq);
- err = SCSI_DH_IO;
- } else {
+ int err = SCSI_DH_IO;
+
+ if (!scsi_get_vpd_page(sdev, 0xC0, csdev->buffer,
+ CLARIION_BUFFER_SIZE))
err = parse_sp_info_reply(sdev, csdev);
- }
+
return err;
}
--
2.1.4
--
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