diff options
Diffstat (limited to 'drivers/s390/block/dasd_devmap.c')
| -rw-r--r-- | drivers/s390/block/dasd_devmap.c | 155 |
1 files changed, 154 insertions, 1 deletions
diff --git a/drivers/s390/block/dasd_devmap.c b/drivers/s390/block/dasd_devmap.c index 8d41f3ed38d7..cb6a67bc89ff 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)) @@ -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. @@ -856,7 +859,7 @@ 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 +872,56 @@ 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 +1179,103 @@ 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 +1284,13 @@ 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, }; |