linux/fs/block_dev.c, branch v5.5

block: don't send uevent for empty disk when not invalidating

2019-12-03T01:49:30Z

Commit 6917d0689993 ("block: merge invalidate_partitions into rescan_partitions") caused a regression where systemd-udevd spins forever using max CPU starting at boot time. It's caused by a behavior change where a KOBJ_CHANGE uevent is now sent in a case where previously it wasn't. Restore the old behavior. Fixes: 6917d0689993 ("block: merge invalidate_partitions into rescan_partitions") Reviewed-by: Christoph Hellwig Signed-off-by: Eric Biggers Signed-off-by: Jens Axboe

block: move clearing bd_invalidated into check_disk_size_change

2019-11-14T14:44:01Z

Both callers of check_disk_size_change clear bd_invalidate directly after the call, so move the clearing into check_disk_size_change itself. Signed-off-by: Christoph Hellwig Signed-off-by: Jens Axboe

block: remove (__)blkdev_reread_part as an exported API

2019-11-14T14:43:59Z

In general drivers should never mess with partition tables directly. Unfortunately s390 and loop do for somewhat historic reasons, but they can use bdev_disk_changed directly instead when we export it as they satisfy the sanity checks we have in __blkdev_reread_part. Signed-off-by: Christoph Hellwig Reviewed-by: Stefan Haberland [dasd] Reviewed-by: Jan Kara Signed-off-by: Jens Axboe

block: fix bdev_disk_changed for non-partitioned devices

2019-11-14T14:43:53Z

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 Reviewed-by: Jan Kara Signed-off-by: Jens Axboe

block: move rescan_partitions to fs/block_dev.c

2019-11-14T14:43:21Z

Large parts of rescan_partitions aren't about partitions, and moving it to block_dev.c will allow for some further cleanups by merging it into its only caller. Signed-off-by: Christoph Hellwig Reviewed-by: Jan Kara Signed-off-by: Jens Axboe

block: merge invalidate_partitions into rescan_partitions

2019-11-14T14:42:41Z

A lot of the logic in invalidate_partitions and rescan_partitions is shared. Merge the two functions to simplify things. There is a small behavior change in that we now send the kevent change notice also if we were not invalidating but no partitions were found, which seems like the right thing to do. Signed-off-by: Christoph Hellwig Reviewed-by: Jan Kara Signed-off-by: Jens Axboe

bdev: Refresh bdev size for disks without partitioning

2019-11-03T14:53:50Z

Currently, block device size in not updated on second and further open for block devices where partition scan is disabled. This is particularly annoying for example for DVD drives as that means block device size does not get updated once the media is inserted into a drive if the device is already open when inserting the media. This is actually always the case for example when pktcdvd is in use. Fix the problem by revalidating block device size on every open even for devices with partition scan disabled. Signed-off-by: Jan Kara Signed-off-by: Jens Axboe

bdev: Factor out bdev revalidation into a common helper

2019-11-03T14:53:49Z

Factor out code handling revalidation of bdev on disk change into a common helper. Signed-off-by: Jan Kara Signed-off-by: Jens Axboe

Merge tag 'vfs-5.4-merge-1' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux

2019-09-19T00:35:20Z

Pull swap access updates from Darrick Wong: "Prohibit writing to active swap files and swap partitions. There's no non-malicious use case for allowing userspace to scribble on storage that the kernel thinks it owns" * tag 'vfs-5.4-merge-1' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux: vfs: don't allow writes to swap files mm: set S_SWAPFILE on blockdev swap devices

vfs: don't allow writes to swap files

2019-08-20T14:55:16Z

Don't let userspace write to an active swap file because the kernel effectively has a long term lease on the storage and things could get seriously corrupted if we let this happen. Signed-off-by: Darrick J. Wong Reviewed-by: Christoph Hellwig