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Subject[PATCH 14/20] cciss: Preserve all 8 bytes of LUN ID for logical drives.
Date
Preserve all 8 bytes of the LunID field returned
by CCISS_REPORT_LOGICAL instead of only saving 4 bytes.
This fixes a bug with logical volume addressing encountered on
an MSA2012.

Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
---
drivers/block/cciss.c | 48 ++++++++++++++++++++++++------------------------
drivers/block/cciss.h | 2 +-
2 files changed, 25 insertions(+), 25 deletions(-)
diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
index 239c4f5..56eeb68 100644
--- a/drivers/block/cciss.c
+++ b/drivers/block/cciss.c
@@ -845,7 +845,8 @@ static int cciss_open(struct block_device *bdev, fmode_t mode)
if (MINOR(bdev->bd_dev) & 0x0f) {
return -ENXIO;
/* if it is, make sure we have a LUN ID */
- } else if (drv->LunID == 0) {
+ } else if (memcmp(drv->LunID, CTLR_LUNID,
+ sizeof(drv->LunID))) {
return -ENXIO;
}
}
@@ -1215,7 +1216,8 @@ static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
case CCISS_GETLUNINFO:{
LogvolInfo_struct luninfo;

- luninfo.LunID = drv->LunID;
+ memcpy(&luninfo.LunID, drv->LunID,
+ sizeof(luninfo.LunID));
luninfo.num_opens = drv->usage_count;
luninfo.num_parts = 0;
if (copy_to_user(argp, &luninfo,
@@ -1610,13 +1612,11 @@ static void cciss_softirq_done(struct request *rq)
spin_unlock_irqrestore(&h->lock, flags);
}

-static void log_unit_to_scsi3addr(ctlr_info_t *h, unsigned char scsi3addr[],
- uint32_t log_unit)
+static inline void log_unit_to_scsi3addr(ctlr_info_t *h,
+ unsigned char scsi3addr[], uint32_t log_unit)
{
- log_unit = h->drv[log_unit].LunID & 0x03fff;
- memset(&scsi3addr[4], 0, 4);
- memcpy(&scsi3addr[0], &log_unit, 4);
- scsi3addr[3] |= 0x40;
+ memcpy(scsi3addr, h->drv[log_unit].LunID,
+ sizeof(h->drv[log_unit].LunID));
}

/* This function gets the SCSI vendor, model, and revision of a logical drive
@@ -1923,7 +1923,8 @@ static void cciss_free_gendisk(ctlr_info_t *h, int drv_index)
* a means to talk to the controller in case no logical
* drives have yet been configured.
*/
-static int cciss_add_gendisk(ctlr_info_t *h, __u32 lunid, int controller_node)
+static int cciss_add_gendisk(ctlr_info_t *h, unsigned char lunid[],
+ int controller_node)
{
int drv_index;

@@ -1942,7 +1943,8 @@ static int cciss_add_gendisk(ctlr_info_t *h, __u32 lunid, int controller_node)
return -1;
}
}
- h->drv[drv_index].LunID = lunid;
+ memcpy(h->drv[drv_index].LunID, lunid,
+ sizeof(h->drv[drv_index].LunID));
if (h->drv[drv_index].dev == NULL) {
if (cciss_create_ld_sysfs_entry(h, drv_index))
goto err_free_disk;
@@ -1972,7 +1974,7 @@ static void cciss_add_controller_node(ctlr_info_t *h)
if (h->gendisk[0] != NULL) /* already did this? Then bail. */
return;

- drv_index = cciss_add_gendisk(h, 0, 1);
+ drv_index = cciss_add_gendisk(h, CTLR_LUNID, 1);
if (drv_index == -1)
goto error;
h->drv[drv_index].block_size = 512;
@@ -2011,7 +2013,7 @@ static int rebuild_lun_table(ctlr_info_t *h, int first_time,
int i;
int drv_found;
int drv_index = 0;
- __u32 lunid = 0;
+ unsigned char lunid[8] = CTLR_LUNID;
unsigned long flags;

if (!capable(CAP_SYS_RAWIO))
@@ -2068,9 +2070,9 @@ static int rebuild_lun_table(ctlr_info_t *h, int first_time,
continue;

for (j = 0; j < num_luns; j++) {
- memcpy(&lunid, &ld_buff->LUN[j][0], 4);
- lunid = le32_to_cpu(lunid);
- if (h->drv[i].LunID == lunid) {
+ memcpy(lunid, &ld_buff->LUN[j][0], sizeof(lunid));
+ if (memcmp(h->drv[i].LunID, lunid,
+ sizeof(lunid)) == 0) {
drv_found = 1;
break;
}
@@ -2095,9 +2097,7 @@ static int rebuild_lun_table(ctlr_info_t *h, int first_time,

drv_found = 0;

- memcpy(&lunid, &ld_buff->LUN[i][0], 4);
- lunid = le32_to_cpu(lunid);
-
+ memcpy(lunid, &ld_buff->LUN[i][0], sizeof(lunid));
/* Find if the LUN is already in the drive array
* of the driver. If so then update its info
* if not in use. If it does not exist then find
@@ -2105,7 +2105,8 @@ static int rebuild_lun_table(ctlr_info_t *h, int first_time,
*/
for (j = 0; j <= h->highest_lun; j++) {
if (h->drv[j].raid_level != -1 &&
- h->drv[j].LunID == lunid) {
+ memcmp(h->drv[j].LunID, lunid,
+ sizeof(h->drv[j].LunID)) == 0) {
drv_index = j;
drv_found = 1;
break;
@@ -2253,8 +2254,7 @@ static int deregister_disk(ctlr_info_t *h, int drv_index,
}
h->highest_lun = newhighest;
}
-
- drv->LunID = 0;
+ memset(drv->LunID, 0, sizeof(drv->LunID));
}
return 0;
}
@@ -2685,7 +2685,8 @@ static int cciss_revalidate(struct gendisk *disk)
InquiryData_struct *inq_buff = NULL;

for (logvol = 0; logvol < CISS_MAX_LUN; logvol++) {
- if (h->drv[logvol].LunID == drv->LunID) {
+ if (memcmp(h->drv[logvol].LunID, drv->LunID,
+ sizeof(drv->LunID)) == 0) {
FOUND = 1;
break;
}
@@ -3170,8 +3171,7 @@ static void do_cciss_request(struct request_queue *q)
/* The first 2 bits are reserved for controller error reporting. */
c->Header.Tag.lower = (c->cmdindex << 3);
c->Header.Tag.lower |= 0x04; /* flag for direct lookup. */
- c->Header.LUN.LogDev.VolId = drv->LunID;
- c->Header.LUN.LogDev.Mode = 1;
+ memcpy(&c->Header.LUN, drv->LunID, sizeof(drv->LunID));
c->Request.CDBLen = 10; // 12 byte commands not in FW yet;
c->Request.Type.Type = TYPE_CMD; // It is a command.
c->Request.Type.Attribute = ATTR_SIMPLE;
diff --git a/drivers/block/cciss.h b/drivers/block/cciss.h
index 9679342..5188f71 100644
--- a/drivers/block/cciss.h
+++ b/drivers/block/cciss.h
@@ -30,7 +30,7 @@ struct access_method {
};
typedef struct _drive_info_struct
{
- __u32 LunID;
+ unsigned char LunID[8];
int usage_count;
struct request_queue *queue;
sector_t nr_blocks;


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