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4 Commits

Author SHA1 Message Date
samuelliao bc99a5f248 block: fix zero ioutil if io stall or disk enter blocked state 
Since commit 5b18b5a737
    block: delete part_round_stats and switch to less precise counting,
io_ticks don't advance if io stall, iostat will show 0% io util.
This patch add back the logical, advance io_ticks if inflight > 0.
show 100% ioutil if io stall. This patch also show 100% ioutil if
queue quiesced, eg: scsi device blocked.

Signed-off-by: samuelliao <samuelliao@tencent.com>
 2022-04-01 10:13:10 +08:00
Daniel Wagner 8f5d867208 block: Suppress uevent for hidden device when removed 
[ 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 <dwagner@suse.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Martin Wilck <mwilck@suse.com>
Link: https://lore.kernel.org/r/20210311151917.136091-1-dwagner@suse.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
 2021-04-12 12:53:25 +08:00
Ming Lei 754f51a371 block: fix use-after-free in disk_part_iter_next 
commit aebf5db917055b38f4945ed6d621d9f07a44ff30 upstream.

Make sure that bdgrab() is done on the 'block_device' instance before
referring to it for avoiding use-after-free.

Cc: <stable@vger.kernel.org>
Reported-by: syzbot+825f0f9657d4e528046e@syzkaller.appspotmail.com
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 2021-04-12 12:51:20 +08:00
Kaixu Xia 590eaf1fec Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 
Signed-off-by: Kaixu Xia <kaixuxia@tencent.com>
 2021-03-16 11:01:34 +08:00