diff options
| author | Christoph Hellwig <hch@lst.de> | 2015-12-24 15:27:02 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2016-01-12 13:30:16 -0700 |
| commit | 4490733250b8b272a6d3e66352dd7b8025409549 (patch) | |
| tree | 6bd4bc5df240bc645aeb5adad549660853837dd6 /drivers/nvme | |
| parent | bfd8947194b2e2a53db82bbc7eb7c15d028c46db (diff) | |
| download | lwn-4490733250b8b272a6d3e66352dd7b8025409549.tar.gz lwn-4490733250b8b272a6d3e66352dd7b8025409549.zip | |
nvme: make SG_IO support optional
Translation SCSI commands to NVMe commands is rather pointless in general
as applications must not expext to be able to use SCSI commands on a
generic block device.
Make the huge translation layer optional and hope no one will ever enable
it in the future.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'drivers/nvme')
| -rw-r--r-- | drivers/nvme/host/Kconfig | 11 | ||||
| -rw-r--r-- | drivers/nvme/host/Makefile | 3 | ||||
| -rw-r--r-- | drivers/nvme/host/core.c | 2 |
3 files changed, 15 insertions, 1 deletions
diff --git a/drivers/nvme/host/Kconfig b/drivers/nvme/host/Kconfig index 002a94abdbc4..5d6237391dcd 100644 --- a/drivers/nvme/host/Kconfig +++ b/drivers/nvme/host/Kconfig @@ -8,3 +8,14 @@ config BLK_DEV_NVME To compile this driver as a module, choose M here: the module will be called nvme. + +config BLK_DEV_NVME_SCSI + bool "SCSI emulation for NVMe device nodes" + depends on BLK_DEV_NVME + ---help--- + This adds support for the SG_IO ioctl on the NVMe character + and block devices nodes, as well a a translation for a small + number of selected SCSI commands to NVMe commands to the NVMe + driver. If you don't know what this means you probably want + to say N here, and if you know what it means you probably + want to say N as well. diff --git a/drivers/nvme/host/Makefile b/drivers/nvme/host/Makefile index 3e26dc921c38..baf9f52bbfa5 100644 --- a/drivers/nvme/host/Makefile +++ b/drivers/nvme/host/Makefile @@ -1,4 +1,5 @@ obj-$(CONFIG_BLK_DEV_NVME) += nvme.o -nvme-y += core.o pci.o scsi.o lightnvm.o +nvme-y += core.o pci.o lightnvm.o +nvme-$(CONFIG_BLK_DEV_NVME_SCSI) += scsi.o diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c index 51f6fc83b051..8da4a8a55c49 100644 --- a/drivers/nvme/host/core.c +++ b/drivers/nvme/host/core.c @@ -467,10 +467,12 @@ static int nvme_ioctl(struct block_device *bdev, fmode_t mode, return nvme_user_cmd(ns->ctrl, ns, (void __user *)arg); case NVME_IOCTL_SUBMIT_IO: return nvme_submit_io(ns, (void __user *)arg); +#ifdef CONFIG_BLK_DEV_NVME_SCSI case SG_GET_VERSION_NUM: return nvme_sg_get_version_num((void __user *)arg); case SG_IO: return nvme_sg_io(ns, (void __user *)arg); +#endif default: return -ENOTTY; } |