diff options
| -rw-r--r-- | drivers/scsi/sd.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c index f899ff0cf005..2e96c3d8f7e2 100644 --- a/drivers/scsi/sd.c +++ b/drivers/scsi/sd.c @@ -208,6 +208,23 @@ static ssize_t sd_store_cache_type(struct class_device *cdev, const char *buf, return count; } +static ssize_t sd_store_allow_restart(struct class_device *cdev, const char *buf, + size_t count) +{ + struct scsi_disk *sdkp = to_scsi_disk(cdev); + struct scsi_device *sdp = sdkp->device; + + if (!capable(CAP_SYS_ADMIN)) + return -EACCES; + + if (sdp->type != TYPE_DISK) + return -EINVAL; + + sdp->allow_restart = simple_strtoul(buf, NULL, 10); + + return count; +} + static ssize_t sd_show_cache_type(struct class_device *cdev, char *buf) { struct scsi_disk *sdkp = to_scsi_disk(cdev); @@ -223,10 +240,19 @@ static ssize_t sd_show_fua(struct class_device *cdev, char *buf) return snprintf(buf, 20, "%u\n", sdkp->DPOFUA); } +static ssize_t sd_show_allow_restart(struct class_device *cdev, char *buf) +{ + struct scsi_disk *sdkp = to_scsi_disk(cdev); + + return snprintf(buf, 40, "%d\n", sdkp->device->allow_restart); +} + static struct class_device_attribute sd_disk_attrs[] = { __ATTR(cache_type, S_IRUGO|S_IWUSR, sd_show_cache_type, sd_store_cache_type), __ATTR(FUA, S_IRUGO, sd_show_fua, NULL), + __ATTR(allow_restart, S_IRUGO|S_IWUSR, sd_show_allow_restart, + sd_store_allow_restart), __ATTR_NULL, }; |