xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

hpsa: add masked physical devices into h->dev[] array

Browse Source 
Cache the ioaccel handle so that when we need to abort commands sent
down the ioaccel2 path, we can look up the LUN ID in h->dev[] instead of
having to do I/O to the controller.

Add a field to elements in h->dev[] to keep track of how the device is exposed
to the SCSI mid layer: Not at all, without an upper level driver
(no_uld_attach) or normally exposed.

Since masked physical devices are now present in h->dev[] array
it would be perfectly possible to do

	echo scsi add-single-device 2 2 0 0 > /proc/scsi/scsi

and bring them online.  This was previously not allowed for masked
physical devices.

Ensure that the mapping of physical disks to logical drives gets updated in a
consistent way when a RAID migration occurs and is not touched until updates
to it are complete.

now instead of doing CISS_REPORT_PHYSICAL to get the LUNID for
the physical disk in hpsa_get_pdisk_of_ioaccel2(), just get
it out of h->dev[] where we already have it cached.

do not touch phys_disk[] for ioaccel enabled logical drives during rescan

Reviewed-by: Scott Teel <scott.teel@pmcs.com>
Reviewed-by: Kevin Barnett <kevin.barnett@pmcs.com>
Reviewed-by: Tomas Henzl <thenzl@redhat.com>
Reviewed-by: Hannes Reinecke <hare@Suse.de>
Signed-off-by: Don Brace <don.brace@pmcs.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: James Bottomley <JBottomley@Odin.com>
This commit is contained in:
Stephen Cameron
2015-04-23 09:31:47 -05:00
committed by James Bottomley
parent 6b6c1cd7da
commit 41ce4c3557
3 changed files with 141 additions and 121 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/scsi/hpsa.h
View File

@@ -54,6 +54,7 @@ struct hpsa_scsi_dev_t {
u32 ioaccel_handle;
int offload_config; /* I/O accel RAID offload configured */
int offload_enabled; /* I/O accel RAID offload enabled */
int offload_to_be_enabled;
int offload_to_mirror; /* Send next I/O accelerator RAID
* offload request to mirror drive
*/
@@ -68,6 +69,11 @@ struct hpsa_scsi_dev_t {
* devices in order to honor physical device queue depth limits.
*/
struct hpsa_scsi_dev_t *phys_disk[RAID_MAP_MAX_ENTRIES];
#define HPSA_DO_NOT_EXPOSE 0x0
#define HPSA_SG_ATTACH 0x1
#define HPSA_ULD_ATTACH 0x2
#define HPSA_SCSI_ADD (HPSA_SG_ATTACH | HPSA_ULD_ATTACH)
u8 expose_state;
};
struct reply_queue_buffer {