rdac hardware handler assumes that there is one-to-one relation ship
between the host and the controller w.r.t lun. IOW, it does not
support "multiple storage partitions" within a storage.
Example:
HBA1 and HBA2 see lun 0 and 1 in storage A (1)
HBA3 and HBA4 see lun 0 and 1 in storage A (2)
HBA5 and HBA6 see lun 0 and 1 in storage A (3)
luns 0 and 1 in (1), (2) and (3) are totally different.
But, rdac handler treats the lun 0s (and lun 1s) as the same when
sending a mode select to the controller, which is wrong.
This patch makes the rdac hardware handler associate HBA and the
storage w.r.t lun (and not the host itself).
Signed-off-by: Chandra Seetharaman <sekharan@xxxxxxxxxx>
---
drivers/scsi/device_handler/scsi_dh_rdac.c | 10 +++++++---
1 files changed, 7 insertions(+), 3 deletions(-)
diff --git a/drivers/scsi/device_handler/scsi_dh_rdac.c b/drivers/scsi/device_handler/scsi_dh_rdac.c
index 214d7f0..67c2c99 100644
--- a/drivers/scsi/device_handler/scsi_dh_rdac.c
+++ b/drivers/scsi/device_handler/scsi_dh_rdac.c
@@ -149,6 +149,7 @@ struct rdac_controller {
} mode_select;
u8 index;
u8 array_name[ARRAY_LABEL_LEN];
+ struct Scsi_Host *host;
spinlock_t ms_lock;
int ms_queued;
struct work_struct ms_work;
@@ -380,7 +381,7 @@ static void release_controller(struct kref *kref)
}
static struct rdac_controller *get_controller(u8 *serial, int index,
- char *array_name)
+ char *array_name, struct scsi_device *sdev)
{
struct rdac_controller *ctlr, *tmp;
@@ -388,7 +389,8 @@ static struct rdac_controller *get_controller(u8 *serial, int index,
list_for_each_entry(tmp, &ctlr_list, node) {
if ((memcmp(tmp->serial, serial, SERIAL_NO_LEN) == 0) &&
- (tmp->index == index)) {
+ (tmp->index == index) &&
+ (tmp->host == sdev->host)) {
kref_get(&tmp->kref);
spin_unlock(&list_lock);
return tmp;
@@ -402,6 +404,7 @@ static struct rdac_controller *get_controller(u8 *serial, int index,
memcpy(ctlr->serial, serial, SERIAL_NO_LEN);
memcpy(ctlr->array_name, array_name, ARRAY_LABEL_LEN);
ctlr->index = index;
+ ctlr->host = sdev->host;
kref_init(&ctlr->kref);
ctlr->use_ms10 = -1;
@@ -525,7 +528,8 @@ static int initialize_controller(struct scsi_device *sdev,
if (err != SCSI_DH_OK)
return err;
inq_p80 = &h->inq.p80;
- h->ctlr = get_controller(inq_p80->serial, index, array_name);
+ h->ctlr = get_controller(inq_p80->serial, index,
+ array_name, sdev);
if (!h->ctlr)
err = SCSI_DH_RES_TEMP_UNAVAIL;
}
--
1.7.1
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