From 64ce60cab24603ac0fcd59c9fbc3be78f4c4d229 Mon Sep 17 00:00:00 2001 From: Don Brace Date: Fri, 1 Jul 2016 13:37:31 -0500 Subject: [PATCH] hpsa: correct skipping masked peripherals The SA controller spins down RAID drive spares. A REGNEWD event causes an inquiry to be sent to all physical drives. This causes the SA controller to spin up the spare. The controller suspends all I/O to a logical volume until the spare is spun up. The spin-up can take over 50 seconds. This can result in one or both of the following: - SML sends down aborts and resets to the logical volume and can cause the logical volume to be off-lined. - a negative impact on the logical volume's I/O performance each time a REGNEWD is triggered. Reviewed-by: Scott Teel Reviewed-by: Kevin Barnett Signed-off-by: Don Brace Signed-off-by: Martin K. Petersen --- drivers/scsi/hpsa.c | 79 ++++++++++++++++++++++++++++++++++++++++++--- 1 file changed, 74 insertions(+), 5 deletions(-) diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c index ff8dcd5b0631..375a39632a7a 100644 --- a/drivers/scsi/hpsa.c +++ b/drivers/scsi/hpsa.c @@ -4105,6 +4105,70 @@ static int hpsa_set_local_logical_count(struct ctlr_info *h, return rc; } +static bool hpsa_is_disk_spare(struct ctlr_info *h, u8 *lunaddrbytes) +{ + struct bmic_identify_physical_device *id_phys; + bool is_spare = false; + int rc; + + id_phys = kzalloc(sizeof(*id_phys), GFP_KERNEL); + if (!id_phys) + return false; + + rc = hpsa_bmic_id_physical_device(h, + lunaddrbytes, + GET_BMIC_DRIVE_NUMBER(lunaddrbytes), + id_phys, sizeof(*id_phys)); + if (rc == 0) + is_spare = (id_phys->more_flags >> 6) & 0x01; + + kfree(id_phys); + return is_spare; +} + +#define RPL_DEV_FLAG_NON_DISK 0x1 +#define RPL_DEV_FLAG_UNCONFIG_DISK_REPORTING_SUPPORTED 0x2 +#define RPL_DEV_FLAG_UNCONFIG_DISK 0x4 + +#define BMIC_DEVICE_TYPE_ENCLOSURE 6 + +static bool hpsa_skip_device(struct ctlr_info *h, u8 *lunaddrbytes, + struct ext_report_lun_entry *rle) +{ + u8 device_flags; + u8 device_type; + + if (!MASKED_DEVICE(lunaddrbytes)) + return false; + + device_flags = rle->device_flags; + device_type = rle->device_type; + + if (device_flags & RPL_DEV_FLAG_NON_DISK) { + if (device_type == BMIC_DEVICE_TYPE_ENCLOSURE) + return false; + return true; + } + + if (!(device_flags & RPL_DEV_FLAG_UNCONFIG_DISK_REPORTING_SUPPORTED)) + return false; + + if (device_flags & RPL_DEV_FLAG_UNCONFIG_DISK) + return false; + + /* + * Spares may be spun down, we do not want to + * do an Inquiry to a RAID set spare drive as + * that would have them spun up, that is a + * performance hit because I/O to the RAID device + * stops while the spin up occurs which can take + * over 50 seconds. + */ + if (hpsa_is_disk_spare(h, lunaddrbytes)) + return true; + + return false; +} static void hpsa_update_scsi_devices(struct ctlr_info *h) { @@ -4198,6 +4262,7 @@ static void hpsa_update_scsi_devices(struct ctlr_info *h) u8 *lunaddrbytes, is_OBDR = 0; int rc = 0; int phys_dev_index = i - (raid_ctlr_position == 0); + bool skip_device = false; physical_device = i < nphysicals + (raid_ctlr_position == 0); @@ -4205,11 +4270,15 @@ static void hpsa_update_scsi_devices(struct ctlr_info *h) lunaddrbytes = figure_lunaddrbytes(h, raid_ctlr_position, i, nphysicals, nlogicals, physdev_list, logdev_list); - /* skip masked non-disk devices */ - if (MASKED_DEVICE(lunaddrbytes) && physical_device && - (physdev_list->LUN[phys_dev_index].device_type != 0x06) && - (physdev_list->LUN[phys_dev_index].device_flags & 0x01)) - continue; + /* + * Skip over some devices such as a spare. + */ + if (!tmpdevice->external && physical_device) { + skip_device = hpsa_skip_device(h, lunaddrbytes, + &physdev_list->LUN[phys_dev_index]); + if (skip_device) + continue; + } /* Get device type, vendor, model, device id */ rc = hpsa_update_device_info(h, lunaddrbytes, tmpdevice,