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https://github.com/clearlinux/kvmtool.git
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Asias He
a67da3beff
This patch brings virito-scsi support to kvm tool.
With the introduce of tcm_vhost (vhost-scsi)
tcm_vhost: Initial merge for vhost level target fabric driver
we can implement virito-scsi by simply having vhost-scsi to handle the
SCSI command.
Howto use:
1) Setup the tcm_vhost target through /sys/kernel/config
[Stefan Hajnoczi, Thanks for the script to setup tcm_vhost]
** Setup wwpn and tpgt
$ wwpn="naa.0"
$ tpgt=/sys/kernel/config/target/vhost/$wwpn/tpgt_0
$ nexus=$tpgt/nexus
$ mkdir -p $tpgt
$ echo -n $wwpn > $nexus
** Setup lun using /dev/ram
$ n=0
$ lun=$tpgt/lun/lun_${n}
$ data=/sys/kernel/config/target/core/iblock_0/data_${n}
$ ram=/dev/ram${n}
$ mkdir -p $lun
$ mkdir -p $data
$ echo -n udev_path=${ram} > $data/control
$ echo -n 1 > $data/enable
$ ln -s $data $lun
2) Run kvm tool with the new disk option '-d scsi:$wwpn:$tpgt', e.g
$ lkvm run -k /boot/bzImage -d ~/img/sid.img -d scsi:naa.0:0
Signed-off-by: Asias He <asias.hejun@gmail.com>
Cc: Nicholas A. Bellinger <nab@linux-iscsi.org>
Cc: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
96 lines
2.9 KiB
C
96 lines
2.9 KiB
C
#ifndef KVM__DISK_IMAGE_H
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#define KVM__DISK_IMAGE_H
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#include "kvm/read-write.h"
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#include "kvm/util.h"
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#include <linux/types.h>
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#include <linux/fs.h> /* for BLKGETSIZE64 */
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#include <sys/ioctl.h>
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#include <sys/types.h>
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#include <sys/mman.h>
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#include <sys/stat.h>
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#include <stdbool.h>
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#include <sys/uio.h>
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#include <stdbool.h>
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#include <stddef.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <fcntl.h>
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#define SECTOR_SHIFT 9
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#define SECTOR_SIZE (1UL << SECTOR_SHIFT)
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enum {
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DISK_IMAGE_REGULAR,
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DISK_IMAGE_MMAP,
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};
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#define MAX_DISK_IMAGES 4
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struct disk_image;
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struct disk_image_operations {
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ssize_t (*read)(struct disk_image *disk, u64 sector, const struct iovec *iov,
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int iovcount, void *param);
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ssize_t (*write)(struct disk_image *disk, u64 sector, const struct iovec *iov,
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int iovcount, void *param);
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int (*flush)(struct disk_image *disk);
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int (*close)(struct disk_image *disk);
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};
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struct disk_image_params {
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const char *filename;
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/*
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* wwpn == World Wide Port Number
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* tpgt == Target Portal Group Tag
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*/
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const char *wwpn;
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const char *tpgt;
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bool readonly;
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bool direct;
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};
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struct disk_image {
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int fd;
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u64 size;
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struct disk_image_operations *ops;
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void *priv;
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void *disk_req_cb_param;
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void (*disk_req_cb)(void *param, long len);
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bool async;
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int evt;
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#ifdef CONFIG_HAS_AIO
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io_context_t ctx;
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#endif
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const char *wwpn;
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const char *tpgt;
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};
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struct disk_image *disk_image__open(const char *filename, bool readonly, bool direct);
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struct disk_image **disk_image__open_all(struct disk_image_params *params, int count);
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struct disk_image *disk_image__new(int fd, u64 size, struct disk_image_operations *ops, int mmap);
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int disk_image__close(struct disk_image *disk);
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int disk_image__close_all(struct disk_image **disks, int count);
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int disk_image__flush(struct disk_image *disk);
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ssize_t disk_image__read(struct disk_image *disk, u64 sector, const struct iovec *iov,
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int iovcount, void *param);
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ssize_t disk_image__write(struct disk_image *disk, u64 sector, const struct iovec *iov,
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int iovcount, void *param);
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ssize_t disk_image__get_serial(struct disk_image *disk, void *buffer, ssize_t *len);
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struct disk_image *raw_image__probe(int fd, struct stat *st, bool readonly);
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struct disk_image *blkdev__probe(const char *filename, int flags, struct stat *st);
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ssize_t raw_image__read(struct disk_image *disk, u64 sector,
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const struct iovec *iov, int iovcount, void *param);
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ssize_t raw_image__write(struct disk_image *disk, u64 sector,
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const struct iovec *iov, int iovcount, void *param);
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ssize_t raw_image__read_mmap(struct disk_image *disk, u64 sector,
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const struct iovec *iov, int iovcount, void *param);
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ssize_t raw_image__write_mmap(struct disk_image *disk, u64 sector,
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const struct iovec *iov, int iovcount, void *param);
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int raw_image__close(struct disk_image *disk);
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void disk_image__set_callback(struct disk_image *disk, void (*disk_req_cb)(void *param, long len));
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#endif /* KVM__DISK_IMAGE_H */
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