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authorChristoph Hellwig <hch@lst.de>2019-11-14 15:34:35 +0100
committerJens Axboe <axboe@kernel.dk>2019-11-14 07:43:53 -0700
commit142fe8f4bb169e8632024d51c64653a8bf140561 (patch)
tree8869801776302654d3442fd763bcde51afc74a32
parenta1548b674403c0de70cc29a1575689917ba60157 (diff)
block: fix bdev_disk_changed for non-partitioned devices
We still have to set the capacity to 0 if invalidating or call revalidate_disk if not even if the disk has no partitions. Fix that by merging rescan_partitions into bdev_disk_changed and just stubbing out blk_add_partitions and blk_drop_partitions for non-partitioned devices. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Jan Kara <jack@suse.cz> Signed-off-by: Jens Axboe <axboe@kernel.dk>
-rw-r--r--block/ioctl.c6
-rw-r--r--block/partition-generic.c5
-rw-r--r--fs/block_dev.c25
-rw-r--r--include/linux/genhd.h1
4 files changed, 15 insertions, 22 deletions
diff --git a/block/ioctl.c b/block/ioctl.c
index f6576a6d5778..5ccd9f016594 100644
--- a/block/ioctl.c
+++ b/block/ioctl.c
@@ -162,16 +162,14 @@ static int blkpg_ioctl(struct block_device *bdev, struct blkpg_ioctl_arg __user
*/
int __blkdev_reread_part(struct block_device *bdev)
{
- struct gendisk *disk = bdev->bd_disk;
-
- if (!disk_part_scan_enabled(disk) || bdev != bdev->bd_contains)
+ if (!disk_part_scan_enabled(bdev->bd_disk) || bdev != bdev->bd_contains)
return -EINVAL;
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
lockdep_assert_held(&bdev->bd_mutex);
- return rescan_partitions(disk, bdev, false);
+ return bdev_disk_changed(bdev, false);
}
EXPORT_SYMBOL(__blkdev_reread_part);
diff --git a/block/partition-generic.c b/block/partition-generic.c
index 2cbc23f6032c..61487421a319 100644
--- a/block/partition-generic.c
+++ b/block/partition-generic.c
@@ -445,6 +445,8 @@ int blk_drop_partitions(struct gendisk *disk, struct block_device *bdev)
struct hd_struct *part;
int res;
+ if (!disk_part_scan_enabled(disk))
+ return 0;
if (bdev->bd_part_count || bdev->bd_super)
return -EBUSY;
res = invalidate_partition(disk, 0);
@@ -514,6 +516,9 @@ int blk_add_partitions(struct gendisk *disk, struct block_device *bdev)
struct parsed_partitions *state;
int ret = -EAGAIN, p, highest;
+ if (!disk_part_scan_enabled(disk))
+ return 0;
+
state = check_partition(disk, bdev);
if (!state)
return 0;
diff --git a/fs/block_dev.c b/fs/block_dev.c
index ec10dacd18d0..ae16466a67f7 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -1508,9 +1508,9 @@ EXPORT_SYMBOL(bd_set_size);
static void __blkdev_put(struct block_device *bdev, fmode_t mode, int for_part);
-static int rescan_partitions(struct gendisk *disk, struct block_device *bdev,
- bool invalidate)
+int bdev_disk_changed(struct block_device *bdev, bool invalidate)
{
+ struct gendisk *disk = bdev->bd_disk;
int ret;
rescan:
@@ -1526,32 +1526,21 @@ rescan:
check_disk_size_change(disk, bdev, !invalidate);
bdev->bd_invalidated = 0;
- if (!get_capacity(disk)) {
+ if (get_capacity(disk)) {
+ ret = blk_add_partitions(disk, bdev);
+ if (ret == -EAGAIN)
+ goto rescan;
+ } else {
/*
* Tell userspace that the media / partition table may have
* changed.
*/
kobject_uevent(&disk_to_dev(disk)->kobj, KOBJ_CHANGE);
- return 0;
}
- ret = blk_add_partitions(disk, bdev);
- if (ret == -EAGAIN)
- goto rescan;
return ret;
}
-
-static void bdev_disk_changed(struct block_device *bdev, bool invalidate)
-{
- if (disk_part_scan_enabled(bdev->bd_disk)) {
- rescan_partitions(bdev->bd_disk, bdev, invalidate);
- } else {
- check_disk_size_change(bdev->bd_disk, bdev, !invalidate);
- bdev->bd_invalidated = 0;
- }
-}
-
/*
* bd_mutex locking:
*
diff --git a/include/linux/genhd.h b/include/linux/genhd.h
index f5cffbf63abf..8bb63027e4d6 100644
--- a/include/linux/genhd.h
+++ b/include/linux/genhd.h
@@ -621,6 +621,7 @@ extern void blk_invalidate_devt(dev_t devt);
extern dev_t blk_lookup_devt(const char *name, int partno);
extern char *disk_name (struct gendisk *hd, int partno, char *buf);
+int bdev_disk_changed(struct block_device *bdev, bool invalidate);
int blk_add_partitions(struct gendisk *disk, struct block_device *bdev);
int blk_drop_partitions(struct gendisk *disk, struct block_device *bdev);
extern int disk_expand_part_tbl(struct gendisk *disk, int target);