d3256f88d9
There's no need to force the user to assign a vdev. We can automatically assign one, starting at xvda and searching until we find the first disk name that's unused. This means we can now allow '-drive if=xen,file=xxx' to work without an explicit separate -driver argument, just like if=virtio. Rip out the legacy handling from the xenpv machine, which was scribbling over any disks configured by the toolstack, and didn't work with anything but raw images. Signed-off-by: David Woodhouse <dwmw@amazon.co.uk> Acked-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Paul Durrant <paul@xen.org>
102 lines
2.9 KiB
C
102 lines
2.9 KiB
C
#include "qemu/osdep.h"
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#include "hw/xen/xen-legacy-backend.h"
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#include "qemu/option.h"
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#include "sysemu/blockdev.h"
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#include "sysemu/sysemu.h"
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/* ------------------------------------------------------------- */
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static int xen_config_dev_dirs(const char *ftype, const char *btype, int vdev,
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char *fe, char *be, int len)
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{
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char *dom;
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dom = qemu_xen_xs_get_domain_path(xenstore, xen_domid);
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snprintf(fe, len, "%s/device/%s/%d", dom, ftype, vdev);
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free(dom);
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dom = qemu_xen_xs_get_domain_path(xenstore, 0);
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snprintf(be, len, "%s/backend/%s/%d/%d", dom, btype, xen_domid, vdev);
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free(dom);
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xenstore_mkdir(fe, XS_PERM_READ | XS_PERM_WRITE);
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xenstore_mkdir(be, XS_PERM_READ);
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return 0;
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}
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static int xen_config_dev_all(char *fe, char *be)
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{
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/* frontend */
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if (xen_protocol)
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xenstore_write_str(fe, "protocol", xen_protocol);
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xenstore_write_int(fe, "state", XenbusStateInitialising);
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xenstore_write_int(fe, "backend-id", 0);
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xenstore_write_str(fe, "backend", be);
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/* backend */
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xenstore_write_str(be, "domain", qemu_name ? qemu_name : "no-name");
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xenstore_write_int(be, "online", 1);
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xenstore_write_int(be, "state", XenbusStateInitialising);
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xenstore_write_int(be, "frontend-id", xen_domid);
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xenstore_write_str(be, "frontend", fe);
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return 0;
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}
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/* ------------------------------------------------------------- */
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int xen_config_dev_nic(NICInfo *nic)
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{
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char fe[256], be[256];
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char mac[20];
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int vlan_id = -1;
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net_hub_id_for_client(nic->netdev, &vlan_id);
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snprintf(mac, sizeof(mac), "%02x:%02x:%02x:%02x:%02x:%02x",
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nic->macaddr.a[0], nic->macaddr.a[1], nic->macaddr.a[2],
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nic->macaddr.a[3], nic->macaddr.a[4], nic->macaddr.a[5]);
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xen_pv_printf(NULL, 1, "config nic %d: mac=\"%s\"\n", vlan_id, mac);
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xen_config_dev_dirs("vif", "qnic", vlan_id, fe, be, sizeof(fe));
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/* frontend */
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xenstore_write_int(fe, "handle", vlan_id);
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xenstore_write_str(fe, "mac", mac);
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/* backend */
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xenstore_write_int(be, "handle", vlan_id);
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xenstore_write_str(be, "mac", mac);
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/* common stuff */
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return xen_config_dev_all(fe, be);
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}
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int xen_config_dev_vfb(int vdev, const char *type)
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{
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char fe[256], be[256];
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xen_config_dev_dirs("vfb", "vfb", vdev, fe, be, sizeof(fe));
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/* backend */
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xenstore_write_str(be, "type", type);
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/* common stuff */
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return xen_config_dev_all(fe, be);
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}
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int xen_config_dev_vkbd(int vdev)
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{
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char fe[256], be[256];
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xen_config_dev_dirs("vkbd", "vkbd", vdev, fe, be, sizeof(fe));
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return xen_config_dev_all(fe, be);
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}
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int xen_config_dev_console(int vdev)
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{
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char fe[256], be[256];
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xen_config_dev_dirs("console", "console", vdev, fe, be, sizeof(fe));
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return xen_config_dev_all(fe, be);
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}
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