kernel/git/stable/linux.git/block/genhd.c, branch linux-5.11.y

block: Suppress uevent for hidden device when removed

2021-03-30T12:30:12+00:00

[ Upstream commit 9ec491447b90ad6a4056a9656b13f0b3a1e83043 ] register_disk() suppress uevents for devices with the GENHD_FL_HIDDEN but enables uevents at the end again in order to announce disk after possible partitions are created. When the device is removed the uevents are still on and user land sees 'remove' messages for devices which were never 'add'ed to the system. KERNEL[95481.571887] remove /devices/virtual/nvme-fabrics/ctl/nvme5/nvme0c5n1 (block) Let's suppress the uevents for GENHD_FL_HIDDEN by not enabling the uevents at all. Signed-off-by: Daniel Wagner Reviewed-by: Christoph Hellwig Reviewed-by: Martin Wilck Link: https://lore.kernel.org/r/20210311151917.136091-1-dwagner@suse.de Signed-off-by: Jens Axboe Signed-off-by: Sasha Levin

block: fix logging on capacity change

2021-03-04T11:15:16+00:00

[ Upstream commit 452c0bf8754fbeffdf579465b82a3c2bbe373c95 ] Local variable of 'capacity' stores the previous disk capacity, and 'size' variable records the latest disk capacity, so swap them for fixing logging on capacity change. Cc: Christoph Hellwig Fixes: a782483cc1f8 ("block: remove the nr_sects field in struct hd_struct") Signed-off-by: Ming Lei Reviewed-by: Christoph Hellwig Signed-off-by: Jens Axboe Signed-off-by: Sasha Levin

block: fix bd_size_lock use

2021-01-28T14:31:50+00:00

Some block device drivers, e.g. the skd driver, call set_capacity() with IRQ disabled. This results in lockdep ito complain about inconsistent lock states ("inconsistent {HARDIRQ-ON-W} -> {IN-HARDIRQ-W} usage") because set_capacity takes a block device bd_size_lock using the functions spin_lock() and spin_unlock(). Ensure a consistent locking state by replacing these calls with spin_lock_irqsave() and spin_lock_irqrestore(). The same applies to bdev_set_nr_sectors(). With this fix, all lockdep complaints are resolved. Signed-off-by: Damien Le Moal Signed-off-by: Jens Axboe

block: fix use-after-free in disk_part_iter_next

2021-01-05T18:35:17+00:00

Make sure that bdgrab() is done on the 'block_device' instance before referring to it for avoiding use-after-free. Cc: Reported-by: syzbot+825f0f9657d4e528046e@syzkaller.appspotmail.com Signed-off-by: Ming Lei Reviewed-by: Christoph Hellwig Signed-off-by: Jens Axboe

block: update some copyrights

2020-12-22T15:43:06+00:00

Update copyrights for files that have gotten some major rewrites lately. Signed-off-by: Christoph Hellwig Reviewed-by: Johannes Thumshirn Signed-off-by: Jens Axboe

block: stop using bdget_disk for partition 0

2020-12-01T21:53:40+00:00

We can just dereference the point in struct gendisk instead. Also remove the now unused export. Signed-off-by: Christoph Hellwig Reviewed-by: Jan Kara Reviewed-by: Hannes Reinecke Signed-off-by: Jens Axboe

block: merge struct block_device and struct hd_struct

2020-12-01T21:53:40+00:00

Instead of having two structures that represent each block device with different life time rules, merge them into a single one. This also greatly simplifies the reference counting rules, as we can use the inode reference count as the main reference count for the new struct block_device, with the device model reference front ending it for device model interaction. Signed-off-by: Christoph Hellwig Reviewed-by: Jan Kara Reviewed-by: Hannes Reinecke Signed-off-by: Jens Axboe

block: switch disk_part_iter_* to use a struct block_device

2020-12-01T21:53:40+00:00

Switch the partition iter infrastructure to iterate over block_device references instead of hd_struct ones mostly used to get at the block_device. Signed-off-by: Christoph Hellwig Reviewed-by: Jan Kara Reviewed-by: Hannes Reinecke Signed-off-by: Jens Axboe

block: pass a block_device to invalidate_partition

2020-12-01T21:53:40+00:00

Pass the block_device actually needed instead of looking it up using bdget_disk. Signed-off-by: Christoph Hellwig Reviewed-by: Jan Kara Reviewed-by: Hannes Reinecke Signed-off-by: Jens Axboe

block: pass a block_device to blk_alloc_devt

2020-12-01T21:53:40+00:00

Pass the block_device actually needed instead of the hd_struct. Signed-off-by: Christoph Hellwig Reviewed-by: Jan Kara Reviewed-by: Hannes Reinecke Signed-off-by: Jens Axboe