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WSL2-Linux-Kernel
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lguest: Convert block device to virtio 1.0 PCI. 

We remove SCSI support (which was removed for 1.0) and VIRTIO_BLK_F_FLUSH
feature flag (removed too, since it's compulsory for 1.0).

The rest is mainly mechanical.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell 2015-02-11 15:15:12 +10:30
Родитель 8e70946943
Коммит 5051654764
1 изменённых файлов: 9 добавлений и 21 удалений
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30
tools/lguest/lguest.c
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@ -64,11 +64,12 @@ typedef uint8_t u8;
/*:*/
#define VIRTIO_PCI_NO_LEGACY
#define VIRTIO_BLK_NO_LEGACY
/* Use in-kernel ones, which defines VIRTIO_F_VERSION_1 */
#include "../../include/uapi/linux/virtio_config.h"
#include <linux/virtio_net.h>
#include <linux/virtio_blk.h>
#include "../../include/uapi/linux/virtio_blk.h"
#include <linux/virtio_console.h>
#include <linux/virtio_rng.h>
#include <linux/virtio_ring.h>
@ -2224,7 +2225,6 @@ static void init_pci_config(struct pci_config *pci, u16 type,
* eg :
* VIRTIO_ID_CONSOLE: class = 0x07, subclass = 0x00
* VIRTIO_ID_NET: class = 0x02, subclass = 0x00
* VIRTIO_ID_BLOCK: class = 0x01, subclass = 0x80
* VIRTIO_ID_RNG: class = 0xff, subclass = 0
*/
pci->class = class;
@ -2663,15 +2663,7 @@ static void blk_request(struct virtqueue *vq)
*/
off = out.sector * 512;
/*
* In general the virtio block driver is allowed to try SCSI commands.
* It'd be nice if we supported eject, for example, but we don't.
*/
if (out.type & VIRTIO_BLK_T_SCSI_CMD) {
fprintf(stderr, "Scsi commands unsupported\n");
*in = VIRTIO_BLK_S_UNSUPP;
wlen = sizeof(*in);
} else if (out.type & VIRTIO_BLK_T_OUT) {
if (out.type & VIRTIO_BLK_T_OUT) {
/*
* Write
*
@ -2735,11 +2727,11 @@ static void setup_block_file(const char *filename)
struct vblk_info *vblk;
struct virtio_blk_config conf;
/* Creat the device. */
dev = new_device("block", VIRTIO_ID_BLOCK);
/* Create the device. */
dev = new_pci_device("block", VIRTIO_ID_BLOCK, 0x01, 0x80);
/* The device has one virtqueue, where the Guest places requests. */
add_virtqueue(dev, VIRTQUEUE_NUM, blk_request);
add_pci_virtqueue(dev, blk_request);
/* Allocate the room for our own bookkeeping */
vblk = dev->priv = malloc(sizeof(*vblk));
@ -2748,9 +2740,6 @@ static void setup_block_file(const char *filename)
vblk->fd = open_or_die(filename, O_RDWR|O_LARGEFILE);
vblk->len = lseek64(vblk->fd, 0, SEEK_END);
/* We support FLUSH. */
add_feature(dev, VIRTIO_BLK_F_FLUSH);
/* Tell Guest how many sectors this device has. */
conf.capacity = cpu_to_le64(vblk->len / 512);
@ -2758,14 +2747,13 @@ static void setup_block_file(const char *filename)
* Tell Guest not to put in too many descriptors at once: two are used
* for the in and out elements.
*/
add_feature(dev, VIRTIO_BLK_F_SEG_MAX);
add_pci_feature(dev, VIRTIO_BLK_F_SEG_MAX);
conf.seg_max = cpu_to_le32(VIRTQUEUE_NUM - 2);
/* Don't try to put whole struct: we have 8 bit limit. */
set_config(dev, offsetof(struct virtio_blk_config, geometry), &conf);
set_device_config(dev, &conf, sizeof(struct virtio_blk_config));
verbose("device %u: virtblock %llu sectors\n",
++devices.device_num, le64_to_cpu(conf.capacity));
devices.device_num, le64_to_cpu(conf.capacity));
}
/*L:211