From: Nick Bowler nbowler@draconx.ca
[ Upstream commit a25d4261582cf00dad884c194d21084836663d3d ]
Commit 89b3d6e60550 ("nvme: simplify the compat ioctl handling") removed the initialization of compat_ioctl from the nvme block_device_operations structures.
Presumably the expectation was that 32-bit ioctls would be directed through the regular handler but this is not the case: failing to assign .compat_ioctl actually means that the compat case is disabled entirely, and any attempt to submit nvme ioctls from 32-bit userspace fails outright with -ENOTTY.
For example:
% smartctl -x /dev/nvme0n1 [...] Read NVMe Identify Controller failed: NVME_IOCTL_ADMIN_CMD: Inappropriate ioctl for device
The blkdev_compat_ptr_ioctl helper can be used to direct compat calls through the main ioctl handler and makes things work again.
Fixes: 89b3d6e60550 ("nvme: simplify the compat ioctl handling") Signed-off-by: Nick Bowler nbowler@draconx.ca Reviewed-by: Guixin Liu kanie@linux.alibaba.com Signed-off-by: Christoph Hellwig hch@lst.de Signed-off-by: Jens Axboe axboe@kernel.dk Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/nvme/host/core.c | 1 + drivers/nvme/host/multipath.c | 1 + 2 files changed, 2 insertions(+)
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c index c9831daafbc6..cf7be9b4f5d3 100644 --- a/drivers/nvme/host/core.c +++ b/drivers/nvme/host/core.c @@ -2093,6 +2093,7 @@ static int nvme_report_zones(struct gendisk *disk, sector_t sector, static const struct block_device_operations nvme_bdev_ops = { .owner = THIS_MODULE, .ioctl = nvme_ioctl, + .compat_ioctl = blkdev_compat_ptr_ioctl, .open = nvme_open, .release = nvme_release, .getgeo = nvme_getgeo, diff --git a/drivers/nvme/host/multipath.c b/drivers/nvme/host/multipath.c index d464fdf978fb..b0fe23439c4a 100644 --- a/drivers/nvme/host/multipath.c +++ b/drivers/nvme/host/multipath.c @@ -408,6 +408,7 @@ const struct block_device_operations nvme_ns_head_ops = { .open = nvme_ns_head_open, .release = nvme_ns_head_release, .ioctl = nvme_ns_head_ioctl, + .compat_ioctl = blkdev_compat_ptr_ioctl, .getgeo = nvme_getgeo, .report_zones = nvme_ns_head_report_zones, .pr_ops = &nvme_pr_ops,