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https://github.com/torvalds/linux
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e467cde238
The block driver uses scatter-gather lists with sg[0] being the request information (struct virtio_blk_outhdr) with the type, sector and inbuf id. The next N sg entries are the bio itself, then the last sg is the status byte. Whether the N entries are in or out depends on whether it's a read or a write. We accept the normal (SCSI) ioctls: they get handed through to the other side which can then handle it or reply that it's unsupported. It's not clear that this actually works in general, since I don't know if blk_pc_request() requests have an accurate rq_data_dir(). Although we try to reply -ENOTTY on unsupported commands, ioctl(fd, CDROMEJECT) returns success to userspace. This needs a separate patch. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Cc: Jens Axboe <jens.axboe@oracle.com>
36 lines
1.1 KiB
Makefile
36 lines
1.1 KiB
Makefile
#
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# Makefile for the kernel block device drivers.
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#
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# 12 June 2000, Christoph Hellwig <hch@infradead.org>
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# Rewritten to use lists instead of if-statements.
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#
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obj-$(CONFIG_MAC_FLOPPY) += swim3.o
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obj-$(CONFIG_BLK_DEV_FD) += floppy.o
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obj-$(CONFIG_AMIGA_FLOPPY) += amiflop.o
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obj-$(CONFIG_PS3_DISK) += ps3disk.o
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obj-$(CONFIG_ATARI_FLOPPY) += ataflop.o
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obj-$(CONFIG_AMIGA_Z2RAM) += z2ram.o
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obj-$(CONFIG_BLK_DEV_RAM) += rd.o
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obj-$(CONFIG_BLK_DEV_LOOP) += loop.o
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obj-$(CONFIG_BLK_DEV_PS2) += ps2esdi.o
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obj-$(CONFIG_BLK_DEV_XD) += xd.o
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obj-$(CONFIG_BLK_CPQ_DA) += cpqarray.o
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obj-$(CONFIG_BLK_CPQ_CISS_DA) += cciss.o
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obj-$(CONFIG_BLK_DEV_DAC960) += DAC960.o
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obj-$(CONFIG_XILINX_SYSACE) += xsysace.o
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obj-$(CONFIG_CDROM_PKTCDVD) += pktcdvd.o
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obj-$(CONFIG_SUNVDC) += sunvdc.o
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obj-$(CONFIG_BLK_DEV_UMEM) += umem.o
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obj-$(CONFIG_BLK_DEV_NBD) += nbd.o
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obj-$(CONFIG_BLK_DEV_CRYPTOLOOP) += cryptoloop.o
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obj-$(CONFIG_VIRTIO_BLK) += virtio_blk.o
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obj-$(CONFIG_VIODASD) += viodasd.o
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obj-$(CONFIG_BLK_DEV_SX8) += sx8.o
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obj-$(CONFIG_BLK_DEV_UB) += ub.o
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obj-$(CONFIG_XEN_BLKDEV_FRONTEND) += xen-blkfront.o
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obj-$(CONFIG_LGUEST_BLOCK) += lguest_blk.o
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