The patch titled
revert "md: improve partition detection in md array"
has been added to the -mm tree. Its filename is
revert-md-improve-partition-detection-in-md-array.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
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------------------------------------------------------
Subject: revert "md: improve partition detection in md array"
From: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Fix http://bugzilla.kernel.org/show_bug.cgi?id=8461
Cc: Neil Brown <neilb@xxxxxxx>
Cc: Nicolas Mailhot <Nicolas.Mailhot@xxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/md/md.c | 26 ++++++++++++++++++--------
drivers/md/raid1.c | 1 +
drivers/md/raid5.c | 2 ++
include/linux/raid/md_k.h | 1 +
4 files changed, 22 insertions(+), 8 deletions(-)
diff -puN drivers/md/md.c~revert-md-improve-partition-detection-in-md-array drivers/md/md.c
--- a/drivers/md/md.c~revert-md-improve-partition-detection-in-md-array
+++ a/drivers/md/md.c
@@ -3104,7 +3104,6 @@ static int do_md_run(mddev_t * mddev)
struct gendisk *disk;
struct mdk_personality *pers;
char b[BDEVNAME_SIZE];
- struct block_device *bdev;
if (list_empty(&mddev->disks))
/* cannot run an array with no devices.. */
@@ -3332,13 +3331,7 @@ static int do_md_run(mddev_t * mddev)
md_wakeup_thread(mddev->thread);
md_wakeup_thread(mddev->sync_thread); /* possibly kick off a reshape */
- bdev = bdget_disk(mddev->gendisk, 0);
- if (bdev) {
- bd_set_size(bdev, mddev->array_size << 1);
- blkdev_ioctl(bdev->bd_inode, NULL, BLKRRPART, 0);
- bdput(bdev);
- }
-
+ mddev->changed = 1;
md_new_event(mddev);
kobject_uevent(&mddev->gendisk->kobj, KOBJ_CHANGE);
return 0;
@@ -3460,6 +3453,7 @@ static int do_md_stop(mddev_t * mddev, i
mddev->pers = NULL;
set_capacity(disk, 0);
+ mddev->changed = 1;
if (mddev->ro)
mddev->ro = 0;
@@ -4599,6 +4593,20 @@ static int md_release(struct inode *inod
return 0;
}
+static int md_media_changed(struct gendisk *disk)
+{
+ mddev_t *mddev = disk->private_data;
+
+ return mddev->changed;
+}
+
+static int md_revalidate(struct gendisk *disk)
+{
+ mddev_t *mddev = disk->private_data;
+
+ mddev->changed = 0;
+ return 0;
+}
static struct block_device_operations md_fops =
{
.owner = THIS_MODULE,
@@ -4606,6 +4614,8 @@ static struct block_device_operations md
.release = md_release,
.ioctl = md_ioctl,
.getgeo = md_getgeo,
+ .media_changed = md_media_changed,
+ .revalidate_disk= md_revalidate,
};
static int md_thread(void * arg)
diff -puN drivers/md/raid1.c~revert-md-improve-partition-detection-in-md-array drivers/md/raid1.c
--- a/drivers/md/raid1.c~revert-md-improve-partition-detection-in-md-array
+++ a/drivers/md/raid1.c
@@ -2063,6 +2063,7 @@ static int raid1_resize(mddev_t *mddev,
*/
mddev->array_size = sectors>>1;
set_capacity(mddev->gendisk, mddev->array_size << 1);
+ mddev->changed = 1;
if (mddev->array_size > mddev->size && mddev->recovery_cp == MaxSector) {
mddev->recovery_cp = mddev->size << 1;
set_bit(MD_RECOVERY_NEEDED, &mddev->recovery);
diff -puN drivers/md/raid5.c~revert-md-improve-partition-detection-in-md-array drivers/md/raid5.c
--- a/drivers/md/raid5.c~revert-md-improve-partition-detection-in-md-array
+++ a/drivers/md/raid5.c
@@ -4514,6 +4514,7 @@ static int raid5_resize(mddev_t *mddev,
sectors &= ~((sector_t)mddev->chunk_size/512 - 1);
mddev->array_size = (sectors * (mddev->raid_disks-conf->max_degraded))>>1;
set_capacity(mddev->gendisk, mddev->array_size << 1);
+ mddev->changed = 1;
if (sectors/2 > mddev->size && mddev->recovery_cp == MaxSector) {
mddev->recovery_cp = mddev->size << 1;
set_bit(MD_RECOVERY_NEEDED, &mddev->recovery);
@@ -4648,6 +4649,7 @@ static void end_reshape(raid5_conf_t *co
conf->mddev->array_size = conf->mddev->size *
(conf->raid_disks - conf->max_degraded);
set_capacity(conf->mddev->gendisk, conf->mddev->array_size << 1);
+ conf->mddev->changed = 1;
bdev = bdget_disk(conf->mddev->gendisk, 0);
if (bdev) {
diff -puN include/linux/raid/md_k.h~revert-md-improve-partition-detection-in-md-array include/linux/raid/md_k.h
--- a/include/linux/raid/md_k.h~revert-md-improve-partition-detection-in-md-array
+++ a/include/linux/raid/md_k.h
@@ -201,6 +201,7 @@ struct mddev_s
struct mutex reconfig_mutex;
atomic_t active;
+ int changed; /* true if we might need to reread partition info */
int degraded; /* whether md should consider
* adding a spare
*/
_
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