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| author | Chandra Seetharaman <sekharan@us.ibm.com> | 2011-07-27 11:22:56 -0700 |
|---|---|---|
| committer | James Bottomley <JBottomley@Parallels.com> | 2011-07-28 11:38:47 +0400 |
| commit | d6857595394f1fa5c5752eae9bb6045c067fa41e (patch) | |
| tree | c9723dd0fdf17843a431d2c79e9791682b70e109 /drivers/scsi | |
| parent | f170c684b55cb8d3bab55b1fb8fa812778d551f2 (diff) | |
| download | linux-stable-d6857595394f1fa5c5752eae9bb6045c067fa41e.tar.gz linux-stable-d6857595394f1fa5c5752eae9bb6045c067fa41e.tar.bz2 linux-stable-d6857595394f1fa5c5752eae9bb6045c067fa41e.zip | |
[SCSI] dh_rdac: Associate HBA and storage in rdac_controller to support partitions in storage
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@us.ibm.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Diffstat (limited to 'drivers/scsi')
| -rw-r--r-- | drivers/scsi/device_handler/scsi_dh_rdac.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/drivers/scsi/device_handler/scsi_dh_rdac.c b/drivers/scsi/device_handler/scsi_dh_rdac.c index f57009b348d6..27c9d65d54a9 100644 --- a/drivers/scsi/device_handler/scsi_dh_rdac.c +++ b/drivers/scsi/device_handler/scsi_dh_rdac.c @@ -158,6 +158,7 @@ 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; @@ -370,7 +371,7 @@ static void release_controller(struct kref *kref) } static struct rdac_controller *get_controller(int index, char *array_name, - u8 *array_id) + u8 *array_id, struct scsi_device *sdev) { struct rdac_controller *ctlr, *tmp; @@ -378,7 +379,8 @@ static struct rdac_controller *get_controller(int index, char *array_name, list_for_each_entry(tmp, &ctlr_list, node) { if ((memcmp(tmp->array_id, array_id, UNIQUE_ID_LEN) == 0) && - (tmp->index == index)) { + (tmp->index == index) && + (tmp->host == sdev->host)) { kref_get(&tmp->kref); spin_unlock(&list_lock); return tmp; @@ -391,6 +393,7 @@ static struct rdac_controller *get_controller(int index, char *array_name, /* initialize fields of controller */ memcpy(ctlr->array_id, array_id, UNIQUE_ID_LEN); ctlr->index = index; + ctlr->host = sdev->host; memcpy(ctlr->array_name, array_name, ARRAY_LABEL_LEN); kref_init(&ctlr->kref); @@ -513,7 +516,7 @@ static int initialize_controller(struct scsi_device *sdev, index = 0; else index = 1; - h->ctlr = get_controller(index, array_name, array_id); + h->ctlr = get_controller(index, array_name, array_id, sdev); if (!h->ctlr) err = SCSI_DH_RES_TEMP_UNAVAIL; } |