summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
Diffstat
-rw-r--r--drivers/scsi/scsi_lib.c51
-rw-r--r--drivers/scsi/scsi_scan.c112
-rw-r--r--include/scsi/scsi_request.h3
3 files changed, 102 insertions, 64 deletions
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index 60f07b6a5ffc..b8212c563fed 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -246,7 +246,7 @@ void scsi_wait_req(struct scsi_request *sreq, const void *cmnd, void *buffer,
unsigned bufflen, int timeout, int retries)
{
DECLARE_COMPLETION(wait);
- int write = sreq->sr_data_direction == DMA_TO_DEVICE;
+ int write = (sreq->sr_data_direction == DMA_TO_DEVICE);
struct request *req;
req = blk_get_request(sreq->sr_device->request_queue, write,
@@ -281,6 +281,55 @@ void scsi_wait_req(struct scsi_request *sreq, const void *cmnd, void *buffer,
EXPORT_SYMBOL(scsi_wait_req);
+/**
+ * scsi_execute_req - insert request and wait for the result
+ * @sdev: scsi device
+ * @cmd: scsi command
+ * @data_direction: data direction
+ * @buffer: data buffer
+ * @bufflen: len of buffer
+ * @sense: optional sense buffer
+ * @timeout: request timeout in seconds
+ * @retries: number of times to retry request
+ *
+ * scsi_execute_req returns the req->errors value which is the
+ * the scsi_cmnd result field.
+ **/
+int scsi_execute_req(struct scsi_device *sdev, unsigned char *cmd,
+ int data_direction, void *buffer, unsigned bufflen,
+ unsigned char *sense, int timeout, int retries)
+{
+ struct request *req;
+ int write = (data_direction == DMA_TO_DEVICE);
+ int ret = DRIVER_ERROR << 24;
+
+ req = blk_get_request(sdev->request_queue, write, __GFP_WAIT);
+
+ if (bufflen && blk_rq_map_kern(sdev->request_queue, req,
+ buffer, bufflen, __GFP_WAIT))
+ goto out;
+
+ req->cmd_len = COMMAND_SIZE(cmd[0]);
+ memcpy(req->cmd, cmd, req->cmd_len);
+ req->sense = sense;
+ req->sense_len = 0;
+ req->timeout = timeout;
+ req->flags |= REQ_BLOCK_PC | REQ_SPECIAL;
+
+ /*
+ * head injection *required* here otherwise quiesce won't work
+ */
+ blk_execute_rq(req->q, NULL, req, 1);
+
+ ret = req->errors;
+ out:
+ blk_put_request(req);
+
+ return ret;
+}
+
+EXPORT_SYMBOL(scsi_execute_req);
+
/*
* Function: scsi_init_cmd_errh()
*
diff --git a/drivers/scsi/scsi_scan.c b/drivers/scsi/scsi_scan.c
index 48edd67982a5..d2ca4b8fbc13 100644
--- a/drivers/scsi/scsi_scan.c
+++ b/drivers/scsi/scsi_scan.c
@@ -111,15 +111,14 @@ MODULE_PARM_DESC(inq_timeout,
/**
* scsi_unlock_floptical - unlock device via a special MODE SENSE command
- * @sreq: used to send the command
+ * @sdev: scsi device to send command to
* @result: area to store the result of the MODE SENSE
*
* Description:
- * Send a vendor specific MODE SENSE (not a MODE SELECT) command using
- * @sreq to unlock a device, storing the (unused) results into result.
+ * Send a vendor specific MODE SENSE (not a MODE SELECT) command.
* Called for BLIST_KEY devices.
**/
-static void scsi_unlock_floptical(struct scsi_request *sreq,
+static void scsi_unlock_floptical(struct scsi_device *sdev,
unsigned char *result)
{
unsigned char scsi_cmd[MAX_COMMAND_SIZE];
@@ -129,11 +128,10 @@ static void scsi_unlock_floptical(struct scsi_request *sreq,
scsi_cmd[1] = 0;
scsi_cmd[2] = 0x2e;
scsi_cmd[3] = 0;
- scsi_cmd[4] = 0x2a; /* size */
+ scsi_cmd[4] = 0x2a; /* size */
scsi_cmd[5] = 0;
- sreq->sr_cmd_len = 0;
- sreq->sr_data_direction = DMA_FROM_DEVICE;
- scsi_wait_req(sreq, scsi_cmd, result, 0x2a /* size */, SCSI_TIMEOUT, 3);
+ scsi_execute_req(sdev, scsi_cmd, DMA_FROM_DEVICE, result, 0x2a, NULL,
+ SCSI_TIMEOUT, 3);
}
/**
@@ -433,26 +431,26 @@ void scsi_target_reap(struct scsi_target *starget)
/**
* scsi_probe_lun - probe a single LUN using a SCSI INQUIRY
- * @sreq: used to send the INQUIRY
+ * @sdev: scsi_device to probe
* @inq_result: area to store the INQUIRY result
+ * @result_len: len of inq_result
* @bflags: store any bflags found here
*
* Description:
- * Probe the lun associated with @sreq using a standard SCSI INQUIRY;
+ * Probe the lun associated with @req using a standard SCSI INQUIRY;
*
- * If the INQUIRY is successful, sreq->sr_result is zero and: the
+ * If the INQUIRY is successful, zero is returned and the
* INQUIRY data is in @inq_result; the scsi_level and INQUIRY length
- * are copied to the Scsi_Device at @sreq->sr_device (sdev);
- * any flags value is stored in *@bflags.
+ * are copied to the Scsi_Device any flags value is stored in *@bflags.
**/
-static void scsi_probe_lun(struct scsi_request *sreq, char *inq_result,
- int *bflags)
+static int scsi_probe_lun(struct scsi_device *sdev, char *inq_result,
+ int result_len, int *bflags)
{
- struct scsi_device *sdev = sreq->sr_device; /* a bit ugly */
+ char sense[SCSI_SENSE_BUFFERSIZE];
unsigned char scsi_cmd[MAX_COMMAND_SIZE];
int first_inquiry_len, try_inquiry_len, next_inquiry_len;
int response_len = 0;
- int pass, count;
+ int pass, count, result;
struct scsi_sense_hdr sshdr;
*bflags = 0;
@@ -475,28 +473,28 @@ static void scsi_probe_lun(struct scsi_request *sreq, char *inq_result,
memset(scsi_cmd, 0, 6);
scsi_cmd[0] = INQUIRY;
scsi_cmd[4] = (unsigned char) try_inquiry_len;
- sreq->sr_cmd_len = 0;
- sreq->sr_data_direction = DMA_FROM_DEVICE;
+ memset(sense, 0, sizeof(sense));
memset(inq_result, 0, try_inquiry_len);
- scsi_wait_req(sreq, (void *) scsi_cmd, (void *) inq_result,
- try_inquiry_len,
- HZ/2 + HZ*scsi_inq_timeout, 3);
+
+ result = scsi_execute_req(sdev, scsi_cmd, DMA_FROM_DEVICE,
+ inq_result, try_inquiry_len, sense,
+ HZ / 2 + HZ * scsi_inq_timeout, 3);
SCSI_LOG_SCAN_BUS(3, printk(KERN_INFO "scsi scan: INQUIRY %s "
"with code 0x%x\n",
- sreq->sr_result ? "failed" : "successful",
- sreq->sr_result));
+ result ? "failed" : "successful", result));
- if (sreq->sr_result) {
+ if (result) {
/*
* not-ready to ready transition [asc/ascq=0x28/0x0]
* or power-on, reset [asc/ascq=0x29/0x0], continue.
* INQUIRY should not yield UNIT_ATTENTION
* but many buggy devices do so anyway.
*/
- if ((driver_byte(sreq->sr_result) & DRIVER_SENSE) &&
- scsi_request_normalize_sense(sreq, &sshdr)) {
+ if ((driver_byte(result) & DRIVER_SENSE) &&
+ scsi_normalize_sense(sense, sizeof(sense),
+ &sshdr)) {
if ((sshdr.sense_key == UNIT_ATTENTION) &&
((sshdr.asc == 0x28) ||
(sshdr.asc == 0x29)) &&
@@ -507,7 +505,7 @@ static void scsi_probe_lun(struct scsi_request *sreq, char *inq_result,
break;
}
- if (sreq->sr_result == 0) {
+ if (result == 0) {
response_len = (unsigned char) inq_result[4] + 5;
if (response_len > 255)
response_len = first_inquiry_len; /* sanity */
@@ -556,8 +554,8 @@ static void scsi_probe_lun(struct scsi_request *sreq, char *inq_result,
/* If the last transfer attempt got an error, assume the
* peripheral doesn't exist or is dead. */
- if (sreq->sr_result)
- return;
+ if (result)
+ return -EIO;
/* Don't report any more data than the device says is valid */
sdev->inquiry_len = min(try_inquiry_len, response_len);
@@ -593,7 +591,7 @@ static void scsi_probe_lun(struct scsi_request *sreq, char *inq_result,
(sdev->scsi_level == 1 && (inq_result[3] & 0x0f) == 1))
sdev->scsi_level++;
- return;
+ return 0;
}
/**
@@ -800,9 +798,8 @@ static int scsi_probe_and_add_lun(struct scsi_target *starget,
void *hostdata)
{
struct scsi_device *sdev;
- struct scsi_request *sreq;
unsigned char *result;
- int bflags, res = SCSI_SCAN_NO_RESPONSE;
+ int bflags, res = SCSI_SCAN_NO_RESPONSE, result_len = 256;
struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
/*
@@ -831,16 +828,13 @@ static int scsi_probe_and_add_lun(struct scsi_target *starget,
sdev = scsi_alloc_sdev(starget, lun, hostdata);
if (!sdev)
goto out;
- sreq = scsi_allocate_request(sdev, GFP_ATOMIC);
- if (!sreq)
- goto out_free_sdev;
- result = kmalloc(256, GFP_ATOMIC |
+
+ result = kmalloc(result_len, GFP_ATOMIC |
((shost->unchecked_isa_dma) ? __GFP_DMA : 0));
if (!result)
- goto out_free_sreq;
+ goto out_free_sdev;
- scsi_probe_lun(sreq, result, &bflags);
- if (sreq->sr_result)
+ if (scsi_probe_lun(sdev, result, result_len, &bflags))
goto out_free_result;
/*
@@ -868,7 +862,7 @@ static int scsi_probe_and_add_lun(struct scsi_target *starget,
if (res == SCSI_SCAN_LUN_PRESENT) {
if (bflags & BLIST_KEY) {
sdev->lockable = 0;
- scsi_unlock_floptical(sreq, result);
+ scsi_unlock_floptical(sdev, result);
}
if (bflagsp)
*bflagsp = bflags;
@@ -876,8 +870,6 @@ static int scsi_probe_and_add_lun(struct scsi_target *starget,
out_free_result:
kfree(result);
- out_free_sreq:
- scsi_release_request(sreq);
out_free_sdev:
if (res == SCSI_SCAN_LUN_PRESENT) {
if (sdevp) {
@@ -1065,13 +1057,14 @@ static int scsi_report_lun_scan(struct scsi_device *sdev, int bflags,
int rescan)
{
char devname[64];
+ char sense[SCSI_SENSE_BUFFERSIZE];
unsigned char scsi_cmd[MAX_COMMAND_SIZE];
unsigned int length;
unsigned int lun;
unsigned int num_luns;
unsigned int retries;
+ int result;
struct scsi_lun *lunp, *lun_data;
- struct scsi_request *sreq;
u8 *data;
struct scsi_sense_hdr sshdr;
struct scsi_target *starget = scsi_target(sdev);
@@ -1089,10 +1082,6 @@ static int scsi_report_lun_scan(struct scsi_device *sdev, int bflags,
if (bflags & BLIST_NOLUN)
return 0;
- sreq = scsi_allocate_request(sdev, GFP_ATOMIC);
- if (!sreq)
- goto out;
-
sprintf(devname, "host %d channel %d id %d",
sdev->host->host_no, sdev->channel, sdev->id);
@@ -1110,7 +1099,7 @@ static int scsi_report_lun_scan(struct scsi_device *sdev, int bflags,
lun_data = kmalloc(length, GFP_ATOMIC |
(sdev->host->unchecked_isa_dma ? __GFP_DMA : 0));
if (!lun_data)
- goto out_release_request;
+ goto out;
scsi_cmd[0] = REPORT_LUNS;
@@ -1129,8 +1118,6 @@ static int scsi_report_lun_scan(struct scsi_device *sdev, int bflags,
scsi_cmd[10] = 0; /* reserved */
scsi_cmd[11] = 0; /* control */
- sreq->sr_cmd_len = 0;
- sreq->sr_data_direction = DMA_FROM_DEVICE;
/*
* We can get a UNIT ATTENTION, for example a power on/reset, so
@@ -1146,29 +1133,30 @@ static int scsi_report_lun_scan(struct scsi_device *sdev, int bflags,
SCSI_LOG_SCAN_BUS(3, printk (KERN_INFO "scsi scan: Sending"
" REPORT LUNS to %s (try %d)\n", devname,
retries));
- scsi_wait_req(sreq, scsi_cmd, lun_data, length,
- SCSI_TIMEOUT + 4*HZ, 3);
+
+ memset(sense, 0, sizeof(sense));
+ result = scsi_execute_req(sdev, scsi_cmd, DMA_FROM_DEVICE,
+ lun_data, length, sense,
+ SCSI_TIMEOUT + 4 * HZ, 3);
+
SCSI_LOG_SCAN_BUS(3, printk (KERN_INFO "scsi scan: REPORT LUNS"
- " %s (try %d) result 0x%x\n", sreq->sr_result
- ? "failed" : "successful", retries,
- sreq->sr_result));
- if (sreq->sr_result == 0)
+ " %s (try %d) result 0x%x\n", result
+ ? "failed" : "successful", retries, result));
+ if (result == 0)
break;
- else if (scsi_request_normalize_sense(sreq, &sshdr)) {
+ else if (scsi_normalize_sense(sense, sizeof(sense), &sshdr)) {
if (sshdr.sense_key != UNIT_ATTENTION)
break;
}
}
- if (sreq->sr_result) {
+ if (result) {
/*
* The device probably does not support a REPORT LUN command
*/
kfree(lun_data);
- scsi_release_request(sreq);
return 1;
}
- scsi_release_request(sreq);
/*
* Get the length from the first four bytes of lun_data.
@@ -1242,8 +1230,6 @@ static int scsi_report_lun_scan(struct scsi_device *sdev, int bflags,
kfree(lun_data);
return 0;
- out_release_request:
- scsi_release_request(sreq);
out:
/*
* We are out of memory, don't try scanning any further.
diff --git a/include/scsi/scsi_request.h b/include/scsi/scsi_request.h
index 98719407d554..d64903a617c3 100644
--- a/include/scsi/scsi_request.h
+++ b/include/scsi/scsi_request.h
@@ -54,6 +54,9 @@ extern void scsi_do_req(struct scsi_request *, const void *cmnd,
void *buffer, unsigned bufflen,
void (*done) (struct scsi_cmnd *),
int timeout, int retries);
+extern int scsi_execute_req(struct scsi_device *sdev, unsigned char *cmd,
+ int data_direction, void *buffer, unsigned bufflen,
+ unsigned char *sense, int timeout, int retries);
struct scsi_mode_data {
__u32 length;
generated by cgit v1.2.3 (git 2.0.4) at 2024-11-08 10:41:13 +0000