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| author | Nick Bowler <nbowler@draconx.ca> | 2022-07-20 23:57:35 -0400 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2022-08-02 17:22:48 -0600 |
| commit | a25d4261582cf00dad884c194d21084836663d3d (patch) | |
| tree | 0d2cbf8a50c6bd3a0ccf35d74a4b08bac6b71ed9 /drivers/nvme/host/multipath.c | |
| parent | eb7e2d92588cc6351286de13e3b5d70ecc768888 (diff) | |
| download | linux-a25d4261582cf00dad884c194d21084836663d3d.tar.bz2 | |
nvme: define compat_ioctl again to unbreak 32-bit userspace.
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>
Diffstat (limited to 'drivers/nvme/host/multipath.c')
| -rw-r--r-- | drivers/nvme/host/multipath.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/nvme/host/multipath.c b/drivers/nvme/host/multipath.c index a22383844159..64f44d98daaf 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, |