diff options
| author | Stefan Haberland <stefan.haberland@de.ibm.com> | 2014-10-01 16:39:47 +0400 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2014-10-09 11:13:54 +0400 |
| commit | 5db8440c36a3308649b99f65b68195394dd7fed4 (patch) | |
| tree | d45026f110bcd99a6893556ade5dcafc740730d2 /drivers/s390/block/dasd_devmap.c | |
| parent | 362ce84f43aac61589a8b60e5bb3fcfae9801b13 (diff) | |
| download | linux-5db8440c36a3308649b99f65b68195394dd7fed4.tar.xz | |
s390/dasd: add support for control unit initiated reconfiguration
Add support for Control Unit Initiated Reconfiguration (CUIR) to
Linux, a storage server interface to reconcile concurrent hardware
changes between storage and host.
Reviewed-by: Stefan Weinhuber <wein@de.ibm.com>
Signed-off-by: Stefan Haberland <stefan.haberland@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390/block/dasd_devmap.c')
| -rw-r--r-- | drivers/s390/block/dasd_devmap.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/drivers/s390/block/dasd_devmap.c b/drivers/s390/block/dasd_devmap.c index 14ba80bfa571..8286f742436b 100644 --- a/drivers/s390/block/dasd_devmap.c +++ b/drivers/s390/block/dasd_devmap.c @@ -1432,6 +1432,29 @@ static ssize_t dasd_reservation_state_store(struct device *dev, static DEVICE_ATTR(last_known_reservation_state, 0644, dasd_reservation_state_show, dasd_reservation_state_store); +static ssize_t dasd_pm_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct dasd_device *device; + u8 opm, nppm, cablepm, cuirpm, hpfpm; + + device = dasd_device_from_cdev(to_ccwdev(dev)); + if (IS_ERR(device)) + return sprintf(buf, "0\n"); + + opm = device->path_data.opm; + nppm = device->path_data.npm; + cablepm = device->path_data.cablepm; + cuirpm = device->path_data.cuirpm; + hpfpm = device->path_data.hpfpm; + dasd_put_device(device); + + return sprintf(buf, "%02x %02x %02x %02x %02x\n", opm, nppm, + cablepm, cuirpm, hpfpm); +} + +static DEVICE_ATTR(path_masks, 0444, dasd_pm_show, NULL); + static struct attribute * dasd_attrs[] = { &dev_attr_readonly.attr, &dev_attr_discipline.attr, @@ -1450,6 +1473,7 @@ static struct attribute * dasd_attrs[] = { &dev_attr_reservation_policy.attr, &dev_attr_last_known_reservation_state.attr, &dev_attr_safe_offline.attr, + &dev_attr_path_masks.attr, NULL, }; |