879 lines
21 KiB
C
879 lines
21 KiB
C
/*
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* vhost-user-scsi sample application
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*
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* Copyright (c) 2016 Nutanix Inc. All rights reserved.
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*
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* Author:
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* Felipe Franciosi <felipe@nutanix.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 only.
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* See the COPYING file in the top-level directory.
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*/
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#include "qemu/osdep.h"
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#include "contrib/libvhost-user/libvhost-user.h"
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#include "hw/virtio/virtio-scsi.h"
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#include "iscsi/iscsi.h"
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#include <glib.h>
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/* #define VUS_DEBUG 1 */
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/** Log helpers **/
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#define PPRE \
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struct timespec ts; \
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char timebuf[64]; \
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struct tm tm; \
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(void)clock_gettime(CLOCK_REALTIME, &ts); \
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(void)strftime(timebuf, 64, "%Y%m%d %T", gmtime_r(&ts.tv_sec, &tm))
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#define PEXT(lvl, msg, ...) do { \
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PPRE; \
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fprintf(stderr, "%s.%06ld " lvl ": %s:%s():%d: " msg "\n", \
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timebuf, ts.tv_nsec / 1000, \
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__FILE__, __func__, __LINE__, ## __VA_ARGS__); \
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} while (0)
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#define PNOR(lvl, msg, ...) do { \
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PPRE; \
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fprintf(stderr, "%s.%06ld " lvl ": " msg "\n", \
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timebuf, ts.tv_nsec / 1000, ## __VA_ARGS__); \
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} while (0)
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#ifdef VUS_DEBUG
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#define PDBG(msg, ...) PEXT("DBG", msg, ## __VA_ARGS__)
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#define PERR(msg, ...) PEXT("ERR", msg, ## __VA_ARGS__)
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#define PLOG(msg, ...) PEXT("LOG", msg, ## __VA_ARGS__)
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#else
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#define PDBG(msg, ...) { }
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#define PERR(msg, ...) PNOR("ERR", msg, ## __VA_ARGS__)
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#define PLOG(msg, ...) PNOR("LOG", msg, ## __VA_ARGS__)
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#endif
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/** vhost-user-scsi specific definitions **/
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/* Only 1 LUN and device supported today */
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#define VUS_MAX_LUNS 1
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#define VUS_MAX_DEVS 1
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#define VUS_ISCSI_INITIATOR "iqn.2016-11.com.nutanix:vhost-user-scsi"
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typedef struct iscsi_lun {
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struct iscsi_context *iscsi_ctx;
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int iscsi_lun;
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} iscsi_lun_t;
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typedef struct vhost_scsi_dev {
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VuDev vu_dev;
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int server_sock;
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GMainLoop *loop;
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GTree *fdmap; /* fd -> gsource context id */
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iscsi_lun_t luns[VUS_MAX_LUNS];
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} vhost_scsi_dev_t;
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static vhost_scsi_dev_t *vhost_scsi_devs[VUS_MAX_DEVS];
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/** glib event loop integration for libvhost-user and misc callbacks **/
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QEMU_BUILD_BUG_ON((int)G_IO_IN != (int)VU_WATCH_IN);
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QEMU_BUILD_BUG_ON((int)G_IO_OUT != (int)VU_WATCH_OUT);
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QEMU_BUILD_BUG_ON((int)G_IO_PRI != (int)VU_WATCH_PRI);
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QEMU_BUILD_BUG_ON((int)G_IO_ERR != (int)VU_WATCH_ERR);
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QEMU_BUILD_BUG_ON((int)G_IO_HUP != (int)VU_WATCH_HUP);
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typedef struct vus_gsrc {
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GSource parent;
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vhost_scsi_dev_t *vdev_scsi;
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GPollFD gfd;
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vu_watch_cb vu_cb;
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} vus_gsrc_t;
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static gint vus_fdmap_compare(gconstpointer a, gconstpointer b)
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{
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return (b > a) - (b < a);
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}
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static gboolean vus_gsrc_prepare(GSource *src, gint *timeout)
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{
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assert(timeout);
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*timeout = -1;
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return FALSE;
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}
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static gboolean vus_gsrc_check(GSource *src)
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{
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vus_gsrc_t *vus_src = (vus_gsrc_t *)src;
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assert(vus_src);
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return vus_src->gfd.revents & vus_src->gfd.events;
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}
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static gboolean vus_gsrc_dispatch(GSource *src, GSourceFunc cb, gpointer data)
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{
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vhost_scsi_dev_t *vdev_scsi;
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vus_gsrc_t *vus_src = (vus_gsrc_t *)src;
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assert(vus_src);
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assert(!(vus_src->vu_cb && cb));
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vdev_scsi = vus_src->vdev_scsi;
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assert(vdev_scsi);
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if (cb) {
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return cb(data);
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}
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if (vus_src->vu_cb) {
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vus_src->vu_cb(&vdev_scsi->vu_dev, vus_src->gfd.revents, data);
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}
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return G_SOURCE_CONTINUE;
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}
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static GSourceFuncs vus_gsrc_funcs = {
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vus_gsrc_prepare,
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vus_gsrc_check,
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vus_gsrc_dispatch,
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NULL
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};
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static int vus_gsrc_new(vhost_scsi_dev_t *vdev_scsi, int fd, GIOCondition cond,
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vu_watch_cb vu_cb, GSourceFunc gsrc_cb, gpointer data)
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{
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GSource *vus_gsrc;
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vus_gsrc_t *vus_src;
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guint id;
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assert(vdev_scsi);
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assert(fd >= 0);
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assert(vu_cb || gsrc_cb);
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assert(!(vu_cb && gsrc_cb));
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vus_gsrc = g_source_new(&vus_gsrc_funcs, sizeof(vus_gsrc_t));
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if (!vus_gsrc) {
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PERR("Error creating GSource for new watch");
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return -1;
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}
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vus_src = (vus_gsrc_t *)vus_gsrc;
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vus_src->vdev_scsi = vdev_scsi;
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vus_src->gfd.fd = fd;
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vus_src->gfd.events = cond;
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vus_src->vu_cb = vu_cb;
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g_source_add_poll(vus_gsrc, &vus_src->gfd);
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g_source_set_callback(vus_gsrc, gsrc_cb, data, NULL);
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id = g_source_attach(vus_gsrc, NULL);
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assert(id);
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g_source_unref(vus_gsrc);
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g_tree_insert(vdev_scsi->fdmap, (gpointer)(uintptr_t)fd,
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(gpointer)(uintptr_t)id);
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return 0;
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}
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/* from libiscsi's scsi-lowlevel.h **
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*
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* nb. We can't directly include scsi-lowlevel.h due to a namespace conflict:
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* QEMU's scsi.h also defines "SCSI_XFER_NONE".
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*/
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#define SCSI_CDB_MAX_SIZE 16
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struct scsi_iovector {
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struct scsi_iovec *iov;
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int niov;
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int nalloc;
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size_t offset;
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int consumed;
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};
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struct scsi_allocated_memory {
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struct scsi_allocated_memory *next;
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char buf[0];
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};
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struct scsi_data {
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int size;
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unsigned char *data;
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};
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enum scsi_sense_key {
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SCSI_SENSE_NO_SENSE = 0x00,
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SCSI_SENSE_RECOVERED_ERROR = 0x01,
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SCSI_SENSE_NOT_READY = 0x02,
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SCSI_SENSE_MEDIUM_ERROR = 0x03,
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SCSI_SENSE_HARDWARE_ERROR = 0x04,
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SCSI_SENSE_ILLEGAL_REQUEST = 0x05,
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SCSI_SENSE_UNIT_ATTENTION = 0x06,
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SCSI_SENSE_DATA_PROTECTION = 0x07,
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SCSI_SENSE_BLANK_CHECK = 0x08,
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SCSI_SENSE_VENDOR_SPECIFIC = 0x09,
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SCSI_SENSE_COPY_ABORTED = 0x0a,
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SCSI_SENSE_COMMAND_ABORTED = 0x0b,
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SCSI_SENSE_OBSOLETE_ERROR_CODE = 0x0c,
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SCSI_SENSE_OVERFLOW_COMMAND = 0x0d,
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SCSI_SENSE_MISCOMPARE = 0x0e
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};
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struct scsi_sense {
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unsigned char error_type;
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enum scsi_sense_key key;
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int ascq;
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unsigned sense_specific:1;
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unsigned ill_param_in_cdb:1;
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unsigned bit_pointer_valid:1;
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unsigned char bit_pointer;
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uint16_t field_pointer;
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};
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enum scsi_residual {
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SCSI_RESIDUAL_NO_RESIDUAL = 0,
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SCSI_RESIDUAL_UNDERFLOW,
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SCSI_RESIDUAL_OVERFLOW
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};
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struct scsi_task {
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int status;
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int cdb_size;
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int xfer_dir;
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int expxferlen;
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unsigned char cdb[SCSI_CDB_MAX_SIZE];
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enum scsi_residual residual_status;
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size_t residual;
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struct scsi_sense sense;
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struct scsi_data datain;
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struct scsi_allocated_memory *mem;
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void *ptr;
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uint32_t itt;
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uint32_t cmdsn;
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uint32_t lun;
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struct scsi_iovector iovector_in;
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struct scsi_iovector iovector_out;
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};
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/** libiscsi integration **/
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static int iscsi_add_lun(iscsi_lun_t *lun, char *iscsi_uri)
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{
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struct iscsi_url *iscsi_url;
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struct iscsi_context *iscsi_ctx;
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int ret = 0;
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assert(lun);
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assert(iscsi_uri);
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iscsi_ctx = iscsi_create_context(VUS_ISCSI_INITIATOR);
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if (!iscsi_ctx) {
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PERR("Unable to create iSCSI context");
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return -1;
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}
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iscsi_url = iscsi_parse_full_url(iscsi_ctx, iscsi_uri);
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if (!iscsi_url) {
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PERR("Unable to parse iSCSI URL: %s", iscsi_get_error(iscsi_ctx));
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goto fail;
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}
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iscsi_set_session_type(iscsi_ctx, ISCSI_SESSION_NORMAL);
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iscsi_set_header_digest(iscsi_ctx, ISCSI_HEADER_DIGEST_NONE_CRC32C);
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if (iscsi_full_connect_sync(iscsi_ctx, iscsi_url->portal, iscsi_url->lun)) {
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PERR("Unable to login to iSCSI portal: %s", iscsi_get_error(iscsi_ctx));
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goto fail;
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}
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lun->iscsi_ctx = iscsi_ctx;
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lun->iscsi_lun = iscsi_url->lun;
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PDBG("Context %p created for lun 0: %s", iscsi_ctx, iscsi_uri);
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out:
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if (iscsi_url) {
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iscsi_destroy_url(iscsi_url);
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}
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return ret;
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fail:
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(void)iscsi_destroy_context(iscsi_ctx);
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ret = -1;
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goto out;
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}
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static struct scsi_task *scsi_task_new(int cdb_len, uint8_t *cdb, int dir,
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int xfer_len) {
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struct scsi_task *task;
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assert(cdb_len > 0);
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assert(cdb);
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task = calloc(1, sizeof(struct scsi_task));
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if (!task) {
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PERR("Error allocating task: %s", strerror(errno));
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return NULL;
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}
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memcpy(task->cdb, cdb, cdb_len);
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task->cdb_size = cdb_len;
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task->xfer_dir = dir;
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task->expxferlen = xfer_len;
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return task;
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}
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static int get_cdb_len(uint8_t *cdb)
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{
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assert(cdb);
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switch (cdb[0] >> 5) {
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case 0: return 6;
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case 1: /* fall through */
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case 2: return 10;
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case 4: return 16;
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case 5: return 12;
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}
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PERR("Unable to determine cdb len (0x%02hhX)", cdb[0] >> 5);
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return -1;
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}
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static int handle_cmd_sync(struct iscsi_context *ctx,
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VirtIOSCSICmdReq *req,
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struct iovec *out, unsigned int out_len,
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VirtIOSCSICmdResp *rsp,
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struct iovec *in, unsigned int in_len) {
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struct scsi_task *task;
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uint32_t dir;
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uint32_t len;
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int cdb_len;
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int i;
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assert(ctx);
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assert(req);
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assert(rsp);
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if (!(!req->lun[1] && req->lun[2] == 0x40 && !req->lun[3])) {
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/* Ignore anything different than target=0, lun=0 */
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PDBG("Ignoring unconnected lun (0x%hhX, 0x%hhX)",
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req->lun[1], req->lun[3]);
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rsp->status = SCSI_STATUS_CHECK_CONDITION;
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memset(rsp->sense, 0, sizeof(rsp->sense));
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rsp->sense_len = 18;
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rsp->sense[0] = 0x70;
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rsp->sense[2] = SCSI_SENSE_ILLEGAL_REQUEST;
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rsp->sense[7] = 10;
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rsp->sense[12] = 0x24;
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return 0;
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}
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cdb_len = get_cdb_len(req->cdb);
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if (cdb_len == -1) {
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return -1;
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}
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len = 0;
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if (!out_len && !in_len) {
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dir = SCSI_XFER_NONE;
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} else if (out_len) {
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dir = SCSI_XFER_TO_DEV;
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for (i = 0; i < out_len; i++) {
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len += out[i].iov_len;
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}
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} else {
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dir = SCSI_XFER_FROM_DEV;
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for (i = 0; i < in_len; i++) {
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len += in[i].iov_len;
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}
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}
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task = scsi_task_new(cdb_len, req->cdb, dir, len);
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if (!task) {
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PERR("Unable to create iscsi task");
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return -1;
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}
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if (dir == SCSI_XFER_TO_DEV) {
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task->iovector_out.iov = (struct scsi_iovec *)out;
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task->iovector_out.niov = out_len;
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} else if (dir == SCSI_XFER_FROM_DEV) {
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task->iovector_in.iov = (struct scsi_iovec *)in;
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task->iovector_in.niov = in_len;
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}
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PDBG("Sending iscsi cmd (cdb_len=%d, dir=%d, task=%p)",
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cdb_len, dir, task);
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if (!iscsi_scsi_command_sync(ctx, 0, task, NULL)) {
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PERR("Error serving SCSI command");
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free(task);
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return -1;
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}
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memset(rsp, 0, sizeof(*rsp));
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rsp->status = task->status;
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rsp->resid = task->residual;
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if (task->status == SCSI_STATUS_CHECK_CONDITION) {
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rsp->response = VIRTIO_SCSI_S_FAILURE;
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rsp->sense_len = task->datain.size - 2;
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memcpy(rsp->sense, &task->datain.data[2], rsp->sense_len);
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}
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free(task);
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PDBG("Filled in rsp: status=%hhX, resid=%u, response=%hhX, sense_len=%u",
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rsp->status, rsp->resid, rsp->response, rsp->sense_len);
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return 0;
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}
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/** libvhost-user callbacks **/
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static vhost_scsi_dev_t *vdev_scsi_find_by_vu(VuDev *vu_dev);
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static void vus_panic_cb(VuDev *vu_dev, const char *buf)
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{
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vhost_scsi_dev_t *vdev_scsi;
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assert(vu_dev);
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vdev_scsi = vdev_scsi_find_by_vu(vu_dev);
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if (buf) {
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PERR("vu_panic: %s", buf);
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}
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if (vdev_scsi) {
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assert(vdev_scsi->loop);
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g_main_loop_quit(vdev_scsi->loop);
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}
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}
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static void vus_add_watch_cb(VuDev *vu_dev, int fd, int vu_evt, vu_watch_cb cb,
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void *pvt) {
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vhost_scsi_dev_t *vdev_scsi;
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guint id;
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assert(vu_dev);
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assert(fd >= 0);
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assert(cb);
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vdev_scsi = vdev_scsi_find_by_vu(vu_dev);
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if (!vdev_scsi) {
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vus_panic_cb(vu_dev, NULL);
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return;
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}
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id = (guint)(uintptr_t)g_tree_lookup(vdev_scsi->fdmap,
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(gpointer)(uintptr_t)fd);
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if (id) {
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GSource *vus_src = g_main_context_find_source_by_id(NULL, id);
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assert(vus_src);
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g_source_destroy(vus_src);
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(void)g_tree_remove(vdev_scsi->fdmap, (gpointer)(uintptr_t)fd);
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}
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if (vus_gsrc_new(vdev_scsi, fd, vu_evt, cb, NULL, pvt)) {
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vus_panic_cb(vu_dev, NULL);
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}
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}
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static void vus_del_watch_cb(VuDev *vu_dev, int fd)
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{
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vhost_scsi_dev_t *vdev_scsi;
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guint id;
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assert(vu_dev);
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assert(fd >= 0);
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vdev_scsi = vdev_scsi_find_by_vu(vu_dev);
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if (!vdev_scsi) {
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vus_panic_cb(vu_dev, NULL);
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return;
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}
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|
|
id = (guint)(uintptr_t)g_tree_lookup(vdev_scsi->fdmap,
|
|
(gpointer)(uintptr_t)fd);
|
|
if (id) {
|
|
GSource *vus_src = g_main_context_find_source_by_id(NULL, id);
|
|
assert(vus_src);
|
|
g_source_destroy(vus_src);
|
|
(void)g_tree_remove(vdev_scsi->fdmap, (gpointer)(uintptr_t)fd);
|
|
}
|
|
}
|
|
|
|
static void vus_proc_ctl(VuDev *vu_dev, int idx)
|
|
{
|
|
/* Control VQ not implemented */
|
|
}
|
|
|
|
static void vus_proc_evt(VuDev *vu_dev, int idx)
|
|
{
|
|
/* Event VQ not implemented */
|
|
}
|
|
|
|
static void vus_proc_req(VuDev *vu_dev, int idx)
|
|
{
|
|
vhost_scsi_dev_t *vdev_scsi;
|
|
VuVirtq *vq;
|
|
|
|
assert(vu_dev);
|
|
|
|
vdev_scsi = vdev_scsi_find_by_vu(vu_dev);
|
|
if (!vdev_scsi) {
|
|
vus_panic_cb(vu_dev, NULL);
|
|
return;
|
|
}
|
|
|
|
if ((idx < 0) || (idx >= VHOST_MAX_NR_VIRTQUEUE)) {
|
|
PERR("VQ Index out of range: %d", idx);
|
|
vus_panic_cb(vu_dev, NULL);
|
|
return;
|
|
}
|
|
|
|
vq = vu_get_queue(vu_dev, idx);
|
|
if (!vq) {
|
|
PERR("Error fetching VQ (dev=%p, idx=%d)", vu_dev, idx);
|
|
vus_panic_cb(vu_dev, NULL);
|
|
return;
|
|
}
|
|
|
|
PDBG("Got kicked on vq[%d]@%p", idx, vq);
|
|
|
|
while (1) {
|
|
VuVirtqElement *elem;
|
|
VirtIOSCSICmdReq *req;
|
|
VirtIOSCSICmdResp *rsp;
|
|
|
|
elem = vu_queue_pop(vu_dev, vq, sizeof(VuVirtqElement));
|
|
if (!elem) {
|
|
PDBG("No more elements pending on vq[%d]@%p", idx, vq);
|
|
break;
|
|
}
|
|
PDBG("Popped elem@%p", elem);
|
|
|
|
assert(!((elem->out_num > 1) && (elem->in_num > 1)));
|
|
assert((elem->out_num > 0) && (elem->in_num > 0));
|
|
|
|
if (elem->out_sg[0].iov_len < sizeof(VirtIOSCSICmdReq)) {
|
|
PERR("Invalid virtio-scsi req header");
|
|
vus_panic_cb(vu_dev, NULL);
|
|
break;
|
|
}
|
|
req = (VirtIOSCSICmdReq *)elem->out_sg[0].iov_base;
|
|
|
|
if (elem->in_sg[0].iov_len < sizeof(VirtIOSCSICmdResp)) {
|
|
PERR("Invalid virtio-scsi rsp header");
|
|
vus_panic_cb(vu_dev, NULL);
|
|
break;
|
|
}
|
|
rsp = (VirtIOSCSICmdResp *)elem->in_sg[0].iov_base;
|
|
|
|
if (handle_cmd_sync(vdev_scsi->luns[0].iscsi_ctx,
|
|
req, &elem->out_sg[1], elem->out_num - 1,
|
|
rsp, &elem->in_sg[1], elem->in_num - 1) != 0) {
|
|
vus_panic_cb(vu_dev, NULL);
|
|
break;
|
|
}
|
|
|
|
vu_queue_push(vu_dev, vq, elem, 0);
|
|
vu_queue_notify(vu_dev, vq);
|
|
|
|
free(elem);
|
|
}
|
|
}
|
|
|
|
static void vus_queue_set_started(VuDev *vu_dev, int idx, bool started)
|
|
{
|
|
VuVirtq *vq;
|
|
|
|
assert(vu_dev);
|
|
|
|
if ((idx < 0) || (idx >= VHOST_MAX_NR_VIRTQUEUE)) {
|
|
PERR("VQ Index out of range: %d", idx);
|
|
vus_panic_cb(vu_dev, NULL);
|
|
return;
|
|
}
|
|
|
|
vq = vu_get_queue(vu_dev, idx);
|
|
|
|
switch (idx) {
|
|
case 0:
|
|
vu_set_queue_handler(vu_dev, vq, started ? vus_proc_ctl : NULL);
|
|
break;
|
|
case 1:
|
|
vu_set_queue_handler(vu_dev, vq, started ? vus_proc_evt : NULL);
|
|
break;
|
|
default:
|
|
vu_set_queue_handler(vu_dev, vq, started ? vus_proc_req : NULL);
|
|
}
|
|
}
|
|
|
|
static const VuDevIface vus_iface = {
|
|
.queue_set_started = vus_queue_set_started,
|
|
};
|
|
|
|
static gboolean vus_vhost_cb(gpointer data)
|
|
{
|
|
VuDev *vu_dev = (VuDev *)data;
|
|
|
|
assert(vu_dev);
|
|
|
|
if (!vu_dispatch(vu_dev) != 0) {
|
|
PERR("Error processing vhost message");
|
|
vus_panic_cb(vu_dev, NULL);
|
|
return G_SOURCE_REMOVE;
|
|
}
|
|
|
|
return G_SOURCE_CONTINUE;
|
|
}
|
|
|
|
/** misc helpers **/
|
|
|
|
static int unix_sock_new(char *unix_fn)
|
|
{
|
|
int sock;
|
|
struct sockaddr_un un;
|
|
size_t len;
|
|
|
|
assert(unix_fn);
|
|
|
|
sock = socket(AF_UNIX, SOCK_STREAM, 0);
|
|
if (sock <= 0) {
|
|
perror("socket");
|
|
return -1;
|
|
}
|
|
|
|
un.sun_family = AF_UNIX;
|
|
(void)snprintf(un.sun_path, sizeof(un.sun_path), "%s", unix_fn);
|
|
len = sizeof(un.sun_family) + strlen(un.sun_path);
|
|
|
|
(void)unlink(unix_fn);
|
|
if (bind(sock, (struct sockaddr *)&un, len) < 0) {
|
|
perror("bind");
|
|
goto fail;
|
|
}
|
|
|
|
if (listen(sock, 1) < 0) {
|
|
perror("listen");
|
|
goto fail;
|
|
}
|
|
|
|
return sock;
|
|
|
|
fail:
|
|
(void)close(sock);
|
|
|
|
return -1;
|
|
}
|
|
|
|
/** vhost-user-scsi **/
|
|
|
|
static vhost_scsi_dev_t *vdev_scsi_find_by_vu(VuDev *vu_dev)
|
|
{
|
|
int i;
|
|
|
|
assert(vu_dev);
|
|
|
|
for (i = 0; i < VUS_MAX_DEVS; i++) {
|
|
if (&vhost_scsi_devs[i]->vu_dev == vu_dev) {
|
|
return vhost_scsi_devs[i];
|
|
}
|
|
}
|
|
|
|
PERR("Unknown VuDev %p", vu_dev);
|
|
return NULL;
|
|
}
|
|
|
|
static void vdev_scsi_deinit(vhost_scsi_dev_t *vdev_scsi)
|
|
{
|
|
if (!vdev_scsi) {
|
|
return;
|
|
}
|
|
|
|
if (vdev_scsi->server_sock >= 0) {
|
|
struct sockaddr_storage ss;
|
|
socklen_t sslen = sizeof(ss);
|
|
|
|
if (getsockname(vdev_scsi->server_sock, (struct sockaddr *)&ss,
|
|
&sslen) == 0) {
|
|
struct sockaddr_un *su = (struct sockaddr_un *)&ss;
|
|
(void)unlink(su->sun_path);
|
|
}
|
|
|
|
(void)close(vdev_scsi->server_sock);
|
|
vdev_scsi->server_sock = -1;
|
|
}
|
|
|
|
if (vdev_scsi->loop) {
|
|
g_main_loop_unref(vdev_scsi->loop);
|
|
vdev_scsi->loop = NULL;
|
|
}
|
|
}
|
|
|
|
static vhost_scsi_dev_t *vdev_scsi_new(char *unix_fn)
|
|
{
|
|
vhost_scsi_dev_t *vdev_scsi = NULL;
|
|
|
|
assert(unix_fn);
|
|
|
|
vdev_scsi = calloc(1, sizeof(vhost_scsi_dev_t));
|
|
if (!vdev_scsi) {
|
|
PERR("calloc: %s", strerror(errno));
|
|
return NULL;
|
|
}
|
|
|
|
vdev_scsi->server_sock = unix_sock_new(unix_fn);
|
|
if (vdev_scsi->server_sock < 0) {
|
|
goto err;
|
|
}
|
|
|
|
vdev_scsi->loop = g_main_loop_new(NULL, FALSE);
|
|
if (!vdev_scsi->loop) {
|
|
PERR("Error creating glib event loop");
|
|
goto err;
|
|
}
|
|
|
|
vdev_scsi->fdmap = g_tree_new(vus_fdmap_compare);
|
|
if (!vdev_scsi->fdmap) {
|
|
PERR("Error creating glib tree for fdmap");
|
|
goto err;
|
|
}
|
|
|
|
return vdev_scsi;
|
|
|
|
err:
|
|
vdev_scsi_deinit(vdev_scsi);
|
|
free(vdev_scsi);
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static int vdev_scsi_add_iscsi_lun(vhost_scsi_dev_t *vdev_scsi,
|
|
char *iscsi_uri, uint32_t lun) {
|
|
assert(vdev_scsi);
|
|
assert(iscsi_uri);
|
|
assert(lun < VUS_MAX_LUNS);
|
|
|
|
if (vdev_scsi->luns[lun].iscsi_ctx) {
|
|
PERR("Lun %d already configured", lun);
|
|
return -1;
|
|
}
|
|
|
|
if (iscsi_add_lun(&vdev_scsi->luns[lun], iscsi_uri) != 0) {
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int vdev_scsi_run(vhost_scsi_dev_t *vdev_scsi)
|
|
{
|
|
int cli_sock;
|
|
int ret = 0;
|
|
|
|
assert(vdev_scsi);
|
|
assert(vdev_scsi->server_sock >= 0);
|
|
assert(vdev_scsi->loop);
|
|
|
|
cli_sock = accept(vdev_scsi->server_sock, (void *)0, (void *)0);
|
|
if (cli_sock < 0) {
|
|
perror("accept");
|
|
return -1;
|
|
}
|
|
|
|
vu_init(&vdev_scsi->vu_dev,
|
|
cli_sock,
|
|
vus_panic_cb,
|
|
vus_add_watch_cb,
|
|
vus_del_watch_cb,
|
|
&vus_iface);
|
|
|
|
if (vus_gsrc_new(vdev_scsi, cli_sock, G_IO_IN, NULL, vus_vhost_cb,
|
|
&vdev_scsi->vu_dev)) {
|
|
goto fail;
|
|
}
|
|
|
|
g_main_loop_run(vdev_scsi->loop);
|
|
|
|
out:
|
|
vu_deinit(&vdev_scsi->vu_dev);
|
|
|
|
return ret;
|
|
|
|
fail:
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
vhost_scsi_dev_t *vdev_scsi = NULL;
|
|
char *unix_fn = NULL;
|
|
char *iscsi_uri = NULL;
|
|
int opt, err = EXIT_SUCCESS;
|
|
|
|
while ((opt = getopt(argc, argv, "u:i:")) != -1) {
|
|
switch (opt) {
|
|
case 'h':
|
|
goto help;
|
|
case 'u':
|
|
unix_fn = strdup(optarg);
|
|
break;
|
|
case 'i':
|
|
iscsi_uri = strdup(optarg);
|
|
break;
|
|
default:
|
|
goto help;
|
|
}
|
|
}
|
|
if (!unix_fn || !iscsi_uri) {
|
|
goto help;
|
|
}
|
|
|
|
vdev_scsi = vdev_scsi_new(unix_fn);
|
|
if (!vdev_scsi) {
|
|
goto err;
|
|
}
|
|
vhost_scsi_devs[0] = vdev_scsi;
|
|
|
|
if (vdev_scsi_add_iscsi_lun(vdev_scsi, iscsi_uri, 0) != 0) {
|
|
goto err;
|
|
}
|
|
|
|
if (vdev_scsi_run(vdev_scsi) != 0) {
|
|
goto err;
|
|
}
|
|
|
|
out:
|
|
if (vdev_scsi) {
|
|
vdev_scsi_deinit(vdev_scsi);
|
|
free(vdev_scsi);
|
|
}
|
|
if (unix_fn) {
|
|
free(unix_fn);
|
|
}
|
|
if (iscsi_uri) {
|
|
free(iscsi_uri);
|
|
}
|
|
|
|
return err;
|
|
|
|
err:
|
|
err = EXIT_FAILURE;
|
|
goto out;
|
|
|
|
help:
|
|
fprintf(stderr, "Usage: %s [ -u unix_sock_path -i iscsi_uri ] | [ -h ]\n",
|
|
argv[0]);
|
|
fprintf(stderr, " -u path to unix socket\n");
|
|
fprintf(stderr, " -i iscsi uri for lun 0\n");
|
|
fprintf(stderr, " -h print help and quit\n");
|
|
|
|
goto err;
|
|
}
|