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nfsd: Check queue type before submitting a SCSI request

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Since using scsi_req() is only allowed against request queues for
which struct scsi_request is the first member of their private
request data, refuse to submit SCSI commands against a queue for
which this is not the case.

References: commit 82ed4db499 ("block: split scsi_request out of struct request")
Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Acked-by: J. Bruce Fields <bfields@redhat.com>
Cc: Jeff Layton <jlayton@poochiereds.net>
Cc: Omar Sandoval <osandov@fb.com>
Cc: linux-nfs@vger.kernel.org
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Bart Van Assche 2017-05-31 14:43:50 -07:00 committed by Jens Axboe
parent 73d17701db
commit 30181faae3
1 changed files with 3 additions and 0 deletions
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3
fs/nfsd/blocklayout.c
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@ -219,6 +219,9 @@ static int nfsd4_scsi_identify_device(struct block_device *bdev,
u8 *buf, *d, type, assoc; u8 *buf, *d, type, assoc;
int error; int error;
if (WARN_ON_ONCE(!blk_queue_scsi_passthrough(q)))
return -EINVAL;
buf = kzalloc(bufflen, GFP_KERNEL); buf = kzalloc(bufflen, GFP_KERNEL);
if (!buf) if (!buf)
return -ENOMEM; return -ENOMEM;