Patch "block: Revert "block: Do not reread partition table on exclusively open device"" has been added to the 6.2-stable tree

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This is a note to let you know that I've just added the patch titled

    block: Revert "block: Do not reread partition table on exclusively open device"

to the 6.2-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     block-revert-block-do-not-reread-partition-table-on-.patch
and it can be found in the queue-6.2 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit d7df9d8a2acd441297f53f66a67967ebbb70fb69
Author: Yu Kuai <yukuai3@xxxxxxxxxx>
Date:   Fri Feb 17 10:21:59 2023 +0800

    block: Revert "block: Do not reread partition table on exclusively open device"
    
    [ Upstream commit 0f77b29ad14e34a89961f32edc87b92db623bb37 ]
    
    This reverts commit 36369f46e91785688a5f39d7a5590e3f07981316.
    
    This patch can't fix the problem in a corner case that device can be
    opened exclusively after the checking and before blkdev_get_by_dev().
    We'll use a new solution to fix the problem in the next patch, and
    the new solution doesn't need to change apis.
    
    Signed-off-by: Yu Kuai <yukuai3@xxxxxxxxxx>
    Acked-by: Jan Kara <jack@xxxxxxx>
    Link: https://lore.kernel.org/r/20230217022200.3092987-2-yukuai1@xxxxxxxxxxxxxxx
    Signed-off-by: Jens Axboe <axboe@xxxxxxxxx>
    Stable-dep-of: e5cfefa97bcc ("block: fix scan partition for exclusively open device again")
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/block/blk.h b/block/blk.h
index 4c3b3325219a5..e835f21d48af0 100644
--- a/block/blk.h
+++ b/block/blk.h
@@ -427,7 +427,7 @@ int bio_add_hw_page(struct request_queue *q, struct bio *bio,
 
 struct request_queue *blk_alloc_queue(int node_id);
 
-int disk_scan_partitions(struct gendisk *disk, fmode_t mode, void *owner);
+int disk_scan_partitions(struct gendisk *disk, fmode_t mode);
 
 int disk_alloc_events(struct gendisk *disk);
 void disk_add_events(struct gendisk *disk);
diff --git a/block/genhd.c b/block/genhd.c
index 23cf83b3331cd..fe47071f79e88 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -356,7 +356,7 @@ void disk_uevent(struct gendisk *disk, enum kobject_action action)
 }
 EXPORT_SYMBOL_GPL(disk_uevent);
 
-int disk_scan_partitions(struct gendisk *disk, fmode_t mode, void *owner)
+int disk_scan_partitions(struct gendisk *disk, fmode_t mode)
 {
 	struct block_device *bdev;
 
@@ -366,9 +366,6 @@ int disk_scan_partitions(struct gendisk *disk, fmode_t mode, void *owner)
 		return -EINVAL;
 	if (disk->open_partitions)
 		return -EBUSY;
-	/* Someone else has bdev exclusively open? */
-	if (disk->part0->bd_holder && disk->part0->bd_holder != owner)
-		return -EBUSY;
 
 	set_bit(GD_NEED_PART_SCAN, &disk->state);
 	bdev = blkdev_get_by_dev(disk_devt(disk), mode, NULL);
@@ -499,7 +496,7 @@ int __must_check device_add_disk(struct device *parent, struct gendisk *disk,
 
 		bdev_add(disk->part0, ddev->devt);
 		if (get_capacity(disk))
-			disk_scan_partitions(disk, FMODE_READ, NULL);
+			disk_scan_partitions(disk, FMODE_READ);
 
 		/*
 		 * Announce the disk and partitions after all partitions are
diff --git a/block/ioctl.c b/block/ioctl.c
index 96617512982e5..6dd49d877584a 100644
--- a/block/ioctl.c
+++ b/block/ioctl.c
@@ -467,10 +467,10 @@ static int blkdev_bszset(struct block_device *bdev, fmode_t mode,
  * user space. Note the separate arg/argp parameters that are needed
  * to deal with the compat_ptr() conversion.
  */
-static int blkdev_common_ioctl(struct file *file, fmode_t mode, unsigned cmd,
-			       unsigned long arg, void __user *argp)
+static int blkdev_common_ioctl(struct block_device *bdev, fmode_t mode,
+			       unsigned int cmd, unsigned long arg,
+			       void __user *argp)
 {
-	struct block_device *bdev = I_BDEV(file->f_mapping->host);
 	unsigned int max_sectors;
 
 	switch (cmd) {
@@ -528,8 +528,7 @@ static int blkdev_common_ioctl(struct file *file, fmode_t mode, unsigned cmd,
 			return -EACCES;
 		if (bdev_is_partition(bdev))
 			return -EINVAL;
-		return disk_scan_partitions(bdev->bd_disk, mode & ~FMODE_EXCL,
-					    file);
+		return disk_scan_partitions(bdev->bd_disk, mode & ~FMODE_EXCL);
 	case BLKTRACESTART:
 	case BLKTRACESTOP:
 	case BLKTRACETEARDOWN:
@@ -607,7 +606,7 @@ long blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg)
 		break;
 	}
 
-	ret = blkdev_common_ioctl(file, mode, cmd, arg, argp);
+	ret = blkdev_common_ioctl(bdev, mode, cmd, arg, argp);
 	if (ret != -ENOIOCTLCMD)
 		return ret;
 
@@ -676,7 +675,7 @@ long compat_blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg)
 		break;
 	}
 
-	ret = blkdev_common_ioctl(file, mode, cmd, arg, argp);
+	ret = blkdev_common_ioctl(bdev, mode, cmd, arg, argp);
 	if (ret == -ENOIOCTLCMD && disk->fops->compat_ioctl)
 		ret = disk->fops->compat_ioctl(bdev, mode, cmd, arg);
 



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