Merge branch 'mpi-master' into wip-k-fmlpwip-k-fmlp

Conflicts:
	litmus/sched_cedf.c

1 files changed, 185 insertions, 2 deletions

diff --git a/drivers/s390/block/dasd_devmap.c b/drivers/s390/block/dasd_devmap.c
index 8d41f3ed38d7..d71511c7850a 100644
--- a/drivers/s390/block/dasd_devmap.c
+++ b/drivers/s390/block/dasd_devmap.c
@@ -208,6 +208,8 @@ dasd_feature_list(char *str, char **endp)
                         features |= DASD_FEATURE_READONLY;
                 else if (len == 4 && !strncmp(str, "diag", 4))
                         features |= DASD_FEATURE_USEDIAG;
+                else if (len == 3 && !strncmp(str, "raw", 3))
+                        features |= DASD_FEATURE_USERAW;
                 else if (len == 6 && !strncmp(str, "erplog", 6))
                         features |= DASD_FEATURE_ERPLOG;
                 else if (len == 8 && !strncmp(str, "failfast", 8))
@@ -300,7 +302,7 @@ dasd_parse_keyword( char *parsestring ) {
 /*
  * Try to interprete the first element on the comma separated parse string
  * as a device number or a range of devices. If the interpretation is
- * successfull, create the matching dasd_devmap entries and return a pointer
+ * successful, create the matching dasd_devmap entries and return a pointer
  * to the residual string.
  * If interpretation fails or in case of an error, return an error code.
  */
@@ -639,6 +641,7 @@ dasd_put_device_wake(struct dasd_device *device)
 {
         wake_up(&dasd_delete_wq);
 }
+EXPORT_SYMBOL_GPL(dasd_put_device_wake);
 
 /*
  * Return dasd_device structure associated with cdev.
@@ -671,6 +674,36 @@ dasd_device_from_cdev(struct ccw_device *cdev)
         return device;
 }
 
+void dasd_add_link_to_gendisk(struct gendisk *gdp, struct dasd_device *device)
+{
+        struct dasd_devmap *devmap;
+
+        devmap = dasd_find_busid(dev_name(&device->cdev->dev));
+        if (IS_ERR(devmap))
+                return;
+        spin_lock(&dasd_devmap_lock);
+        gdp->private_data = devmap;
+        spin_unlock(&dasd_devmap_lock);
+}
+
+struct dasd_device *dasd_device_from_gendisk(struct gendisk *gdp)
+{
+        struct dasd_device *device;
+        struct dasd_devmap *devmap;
+
+        if (!gdp->private_data)
+                return NULL;
+        device = NULL;
+        spin_lock(&dasd_devmap_lock);
+        devmap = gdp->private_data;
+        if (devmap && devmap->device) {
+                device = devmap->device;
+                dasd_get_device(device);
+        }
+        spin_unlock(&dasd_devmap_lock);
+        return device;
+}
+
 /*
  * SECTION: files in sysfs
  */
@@ -856,7 +889,7 @@ dasd_use_diag_store(struct device *dev, struct device_attribute *attr,
         spin_lock(&dasd_devmap_lock);
         /* Changing diag discipline flag is only allowed in offline state. */
         rc = count;
-        if (!devmap->device) {
+        if (!devmap->device && !(devmap->features & DASD_FEATURE_USERAW)) {
                 if (val)
                         devmap->features |= DASD_FEATURE_USEDIAG;
                 else
@@ -869,6 +902,56 @@ dasd_use_diag_store(struct device *dev, struct device_attribute *attr,
 
 static DEVICE_ATTR(use_diag, 0644, dasd_use_diag_show, dasd_use_diag_store);
 
+/*
+ * use_raw controls whether the driver should give access to raw eckd data or
+ * operate in standard mode
+ */
+static ssize_t
+dasd_use_raw_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+        struct dasd_devmap *devmap;
+        int use_raw;
+
+        devmap = dasd_find_busid(dev_name(dev));
+        if (!IS_ERR(devmap))
+                use_raw = (devmap->features & DASD_FEATURE_USERAW) != 0;
+        else
+                use_raw = (DASD_FEATURE_DEFAULT & DASD_FEATURE_USERAW) != 0;
+        return sprintf(buf, use_raw ? "1\n" : "0\n");
+}
+
+static ssize_t
+dasd_use_raw_store(struct device *dev, struct device_attribute *attr,
+                    const char *buf, size_t count)
+{
+        struct dasd_devmap *devmap;
+        ssize_t rc;
+        unsigned long val;
+
+        devmap = dasd_devmap_from_cdev(to_ccwdev(dev));
+        if (IS_ERR(devmap))
+                return PTR_ERR(devmap);
+
+        if ((strict_strtoul(buf, 10, &val) != 0) || val > 1)
+                return -EINVAL;
+
+        spin_lock(&dasd_devmap_lock);
+        /* Changing diag discipline flag is only allowed in offline state. */
+        rc = count;
+        if (!devmap->device && !(devmap->features & DASD_FEATURE_USEDIAG)) {
+                if (val)
+                        devmap->features |= DASD_FEATURE_USERAW;
+                else
+                        devmap->features &= ~DASD_FEATURE_USERAW;
+        } else
+                rc = -EPERM;
+        spin_unlock(&dasd_devmap_lock);
+        return rc;
+}
+
+static DEVICE_ATTR(raw_track_access, 0644, dasd_use_raw_show,
+                   dasd_use_raw_store);
+
 static ssize_t
 dasd_discipline_show(struct device *dev, struct device_attribute *attr,
                      char *buf)
@@ -1126,6 +1209,103 @@ dasd_expires_store(struct device *dev, struct device_attribute *attr,
 
 static DEVICE_ATTR(expires, 0644, dasd_expires_show, dasd_expires_store);
 
+static ssize_t dasd_reservation_policy_show(struct device *dev,
+                                            struct device_attribute *attr,
+                                            char *buf)
+{
+        struct dasd_devmap *devmap;
+        int rc = 0;
+
+        devmap = dasd_find_busid(dev_name(dev));
+        if (IS_ERR(devmap)) {
+                rc = snprintf(buf, PAGE_SIZE, "ignore\n");
+        } else {
+                spin_lock(&dasd_devmap_lock);
+                if (devmap->features & DASD_FEATURE_FAILONSLCK)
+                        rc = snprintf(buf, PAGE_SIZE, "fail\n");
+                else
+                        rc = snprintf(buf, PAGE_SIZE, "ignore\n");
+                spin_unlock(&dasd_devmap_lock);
+        }
+        return rc;
+}
+
+static ssize_t dasd_reservation_policy_store(struct device *dev,
+                                             struct device_attribute *attr,
+                                             const char *buf, size_t count)
+{
+        struct dasd_devmap *devmap;
+        int rc;
+
+        devmap = dasd_devmap_from_cdev(to_ccwdev(dev));
+        if (IS_ERR(devmap))
+                return PTR_ERR(devmap);
+        rc = 0;
+        spin_lock(&dasd_devmap_lock);
+        if (sysfs_streq("ignore", buf))
+                devmap->features &= ~DASD_FEATURE_FAILONSLCK;
+        else if (sysfs_streq("fail", buf))
+                devmap->features |= DASD_FEATURE_FAILONSLCK;
+        else
+                rc = -EINVAL;
+        if (devmap->device)
+                devmap->device->features = devmap->features;
+        spin_unlock(&dasd_devmap_lock);
+        if (rc)
+                return rc;
+        else
+                return count;
+}
+
+static DEVICE_ATTR(reservation_policy, 0644,
+                   dasd_reservation_policy_show, dasd_reservation_policy_store);
+
+static ssize_t dasd_reservation_state_show(struct device *dev,
+                                           struct device_attribute *attr,
+                                           char *buf)
+{
+        struct dasd_device *device;
+        int rc = 0;
+
+        device = dasd_device_from_cdev(to_ccwdev(dev));
+        if (IS_ERR(device))
+                return snprintf(buf, PAGE_SIZE, "none\n");
+
+        if (test_bit(DASD_FLAG_IS_RESERVED, &device->flags))
+                rc = snprintf(buf, PAGE_SIZE, "reserved\n");
+        else if (test_bit(DASD_FLAG_LOCK_STOLEN, &device->flags))
+                rc = snprintf(buf, PAGE_SIZE, "lost\n");
+        else
+                rc = snprintf(buf, PAGE_SIZE, "none\n");
+        dasd_put_device(device);
+        return rc;
+}
+
+static ssize_t dasd_reservation_state_store(struct device *dev,
+                                            struct device_attribute *attr,
+                                            const char *buf, size_t count)
+{
+        struct dasd_device *device;
+        int rc = 0;
+
+        device = dasd_device_from_cdev(to_ccwdev(dev));
+        if (IS_ERR(device))
+                return -ENODEV;
+        if (sysfs_streq("reset", buf))
+                clear_bit(DASD_FLAG_LOCK_STOLEN, &device->flags);
+        else
+                rc = -EINVAL;
+        dasd_put_device(device);
+
+        if (rc)
+                return rc;
+        else
+                return count;
+}
+
+static DEVICE_ATTR(last_known_reservation_state, 0644,
+                   dasd_reservation_state_show, dasd_reservation_state_store);
+
 static struct attribute * dasd_attrs[] = {
         &dev_attr_readonly.attr,
         &dev_attr_discipline.attr,
@@ -1134,10 +1314,13 @@ static struct attribute * dasd_attrs[] = {
         &dev_attr_vendor.attr,
         &dev_attr_uid.attr,
         &dev_attr_use_diag.attr,
+        &dev_attr_raw_track_access.attr,
         &dev_attr_eer_enabled.attr,
         &dev_attr_erplog.attr,
         &dev_attr_failfast.attr,
         &dev_attr_expires.attr,
+        &dev_attr_reservation_policy.attr,
+        &dev_attr_last_known_reservation_state.attr,
         NULL,
 };