src/patches/suse-2.6.27.31/patches.suse/genhd-disk-ro-uevents

   1 From: Hannes Reinecke <hare@suse.de>
   2 Subject: Send uevents for write_protect changes
   3 References: bnc#440959
   4
   5 Whenever a block device changes it's read-only attribute
   6 we should notify the userspace about it.
   7
   8 Signed-off-by: Hannes Reinecke <hare@suse.de>
   9
  10 ---
  11  block/genhd.c |   13 +++++++++++++
  12  1 file changed, 13 insertions(+)
  13
  14 --- a/block/genhd.c
  15 +++ b/block/genhd.c
  16 @@ -813,6 +813,16 @@ void put_disk(struct gendisk *disk)
  17
  18  EXPORT_SYMBOL(put_disk);
  19
  20 +static void set_disk_ro_uevent(struct gendisk *gd, int ro)
  21 +{
  22 +       char event[] = "DISK_RO=1";
  23 +       char *envp[] = { event, NULL };
  24 +
  25 +       if (!ro)
  26 +               event[8] = '0';
  27 +       kobject_uevent_env(&gd->dev.kobj, KOBJ_CHANGE, envp);
  28 +}
  29 +
  30  void set_device_ro(struct block_device *bdev, int flag)
  31  {
  32         if (bdev->bd_contains != bdev)
  33 @@ -826,6 +836,9 @@ EXPORT_SYMBOL(set_device_ro);
  34  void set_disk_ro(struct gendisk *disk, int flag)
  35  {
  36         int i;
  37 +       if (disk->policy != flag)
  38 +               set_disk_ro_uevent(disk, flag);
  39 +
  40         disk->policy = flag;
  41         for (i = 0; i < disk->minors - 1; i++)
  42                 if (disk->part[i]) disk->part[i]->policy = flag;