The patch titled
genhd: send uevents for disk write_protect changes
has been removed from the -mm tree. Its filename was
genhd-send-uevents-for-disk-write_protect-changes.patch
This patch was dropped because it was merged into mainline or a subsystem tree
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: genhd: send uevents for disk write_protect changes
From: Hannes Reinecke <hare@xxxxxxx>
Whenever a block device changes it's read-only attribute notify the
userspace about it.
This patch is needed for the dm-multipath, so that the daemon can capture
the event and reload the dm table when the read-only setting of the disk
changes.
Signed-off-by: Hannes Reinecke <hare@xxxxxxx>
Signed-off-by: Nikanth Karthikesan <knikanth@xxxxxxx>
Cc: Jens Axboe <jens.axboe@xxxxxxxxxx>
Cc: Tejun Heo <tj@xxxxxxxxxx>
Cc: Alasdair G Kergon <agk@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
block/genhd.c | 18 ++++++++++++++++--
1 file changed, 16 insertions(+), 2 deletions(-)
diff -puN block/genhd.c~genhd-send-uevents-for-disk-write_protect-changes block/genhd.c
--- a/block/genhd.c~genhd-send-uevents-for-disk-write_protect-changes
+++ a/block/genhd.c
@@ -1215,6 +1215,16 @@ void put_disk(struct gendisk *disk)
EXPORT_SYMBOL(put_disk);
+static void set_disk_ro_uevent(struct gendisk *gd, int ro)
+{
+ char event[] = "DISK_RO=1";
+ char *envp[] = { event, NULL };
+
+ if (!ro)
+ event[8] = '0';
+ kobject_uevent_env(&disk_to_dev(gd)->kobj, KOBJ_CHANGE, envp);
+}
+
void set_device_ro(struct block_device *bdev, int flag)
{
bdev->bd_part->policy = flag;
@@ -1227,8 +1237,12 @@ void set_disk_ro(struct gendisk *disk, i
struct disk_part_iter piter;
struct hd_struct *part;
- disk_part_iter_init(&piter, disk,
- DISK_PITER_INCL_EMPTY | DISK_PITER_INCL_PART0);
+ if (disk->part0.policy != flag) {
+ set_disk_ro_uevent(disk, flag);
+ disk->part0.policy = flag;
+ }
+
+ disk_part_iter_init(&piter, disk, DISK_PITER_INCL_EMPTY);
while ((part = disk_part_iter_next(&piter)))
part->policy = flag;
disk_part_iter_exit(&piter);
_
Patches currently in -mm which might be from hare@xxxxxxx are
linux-next.patch
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