| /* |
| * Copyright (C) 2014 Citrix Systems UK Ltd. |
| * |
| * This work is licensed under the terms of the GNU GPL, version 2. See |
| * the COPYING file in the top-level directory. |
| * |
| * Contributions after 2012-01-13 are licensed under the terms of the |
| * GNU GPL, version 2 or (at your option) any later version. |
| */ |
| |
| #include "qemu/osdep.h" |
| #include "qemu/error-report.h" |
| #include "qemu/module.h" |
| #include "hw/xen/xen-legacy-backend.h" |
| #include "chardev/char.h" |
| #include "sysemu/accel.h" |
| #include "migration/misc.h" |
| #include "migration/global_state.h" |
| |
| //#define DEBUG_XEN |
| |
| #ifdef DEBUG_XEN |
| #define DPRINTF(fmt, ...) \ |
| do { fprintf(stderr, "xen: " fmt, ## __VA_ARGS__); } while (0) |
| #else |
| #define DPRINTF(fmt, ...) \ |
| do { } while (0) |
| #endif |
| |
| xc_interface *xen_xc; |
| xenforeignmemory_handle *xen_fmem; |
| xendevicemodel_handle *xen_dmod; |
| |
| static int store_dev_info(int domid, Chardev *cs, const char *string) |
| { |
| struct xs_handle *xs = NULL; |
| char *path = NULL; |
| char *newpath = NULL; |
| char *pts = NULL; |
| int ret = -1; |
| |
| /* Only continue if we're talking to a pty. */ |
| if (!CHARDEV_IS_PTY(cs)) { |
| return 0; |
| } |
| pts = cs->filename + 4; |
| |
| /* We now have everything we need to set the xenstore entry. */ |
| xs = xs_open(0); |
| if (xs == NULL) { |
| fprintf(stderr, "Could not contact XenStore\n"); |
| goto out; |
| } |
| |
| path = xs_get_domain_path(xs, domid); |
| if (path == NULL) { |
| fprintf(stderr, "xs_get_domain_path() error\n"); |
| goto out; |
| } |
| newpath = realloc(path, (strlen(path) + strlen(string) + |
| strlen("/tty") + 1)); |
| if (newpath == NULL) { |
| fprintf(stderr, "realloc error\n"); |
| goto out; |
| } |
| path = newpath; |
| |
| strcat(path, string); |
| strcat(path, "/tty"); |
| if (!xs_write(xs, XBT_NULL, path, pts, strlen(pts))) { |
| fprintf(stderr, "xs_write for '%s' fail", string); |
| goto out; |
| } |
| ret = 0; |
| |
| out: |
| free(path); |
| xs_close(xs); |
| |
| return ret; |
| } |
| |
| void xenstore_store_pv_console_info(int i, Chardev *chr) |
| { |
| if (i == 0) { |
| store_dev_info(xen_domid, chr, "/console"); |
| } else { |
| char buf[32]; |
| snprintf(buf, sizeof(buf), "/device/console/%d", i); |
| store_dev_info(xen_domid, chr, buf); |
| } |
| } |
| |
| |
| static void xenstore_record_dm_state(struct xs_handle *xs, const char *state) |
| { |
| char path[50]; |
| |
| if (xs == NULL) { |
| error_report("xenstore connection not initialized"); |
| exit(1); |
| } |
| |
| snprintf(path, sizeof (path), "device-model/%u/state", xen_domid); |
| /* |
| * This call may fail when running restricted so don't make it fatal in |
| * that case. Toolstacks should instead use QMP to listen for state changes. |
| */ |
| if (!xs_write(xs, XBT_NULL, path, state, strlen(state)) && |
| !xen_domid_restrict) { |
| error_report("error recording dm state"); |
| exit(1); |
| } |
| } |
| |
| |
| static void xen_change_state_handler(void *opaque, int running, |
| RunState state) |
| { |
| if (running) { |
| /* record state running */ |
| xenstore_record_dm_state(xenstore, "running"); |
| } |
| } |
| |
| static void xen_setup_post(MachineState *ms, AccelState *accel) |
| { |
| int rc; |
| |
| if (xen_domid_restrict) { |
| rc = xen_restrict(xen_domid); |
| if (rc < 0) { |
| perror("xen: failed to restrict"); |
| exit(1); |
| } |
| } |
| } |
| |
| static int xen_init(MachineState *ms) |
| { |
| xen_xc = xc_interface_open(0, 0, 0); |
| if (xen_xc == NULL) { |
| xen_pv_printf(NULL, 0, "can't open xen interface\n"); |
| return -1; |
| } |
| xen_fmem = xenforeignmemory_open(0, 0); |
| if (xen_fmem == NULL) { |
| xen_pv_printf(NULL, 0, "can't open xen fmem interface\n"); |
| xc_interface_close(xen_xc); |
| return -1; |
| } |
| xen_dmod = xendevicemodel_open(0, 0); |
| if (xen_dmod == NULL) { |
| xen_pv_printf(NULL, 0, "can't open xen devicemodel interface\n"); |
| xenforeignmemory_close(xen_fmem); |
| xc_interface_close(xen_xc); |
| return -1; |
| } |
| qemu_add_vm_change_state_handler(xen_change_state_handler, NULL); |
| return 0; |
| } |
| |
| static void xen_accel_class_init(ObjectClass *oc, void *data) |
| { |
| AccelClass *ac = ACCEL_CLASS(oc); |
| static GlobalProperty compat[] = { |
| { "migration", "store-global-state", "off" }, |
| { "migration", "send-configuration", "off" }, |
| { "migration", "send-section-footer", "off" }, |
| }; |
| |
| ac->name = "Xen"; |
| ac->init_machine = xen_init; |
| ac->setup_post = xen_setup_post; |
| ac->allowed = &xen_allowed; |
| ac->compat_props = g_ptr_array_new(); |
| |
| compat_props_add(ac->compat_props, compat, G_N_ELEMENTS(compat)); |
| } |
| |
| #define TYPE_XEN_ACCEL ACCEL_CLASS_NAME("xen") |
| |
| static const TypeInfo xen_accel_type = { |
| .name = TYPE_XEN_ACCEL, |
| .parent = TYPE_ACCEL, |
| .class_init = xen_accel_class_init, |
| }; |
| |
| static void xen_type_init(void) |
| { |
| type_register_static(&xen_accel_type); |
| } |
| |
| type_init(xen_type_init); |