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cac1f06061486f0aca22061468b50ae1ee99ac0c
xen/tools/libxl/libxl_nic.c
T
Oleksandr Grytsov cac1f06061 libxl: change nic to use generec add function 
Signed-off-by: Oleksandr Grytsov <oleksandr_grytsov@epam.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
[ wei: add missing semicolon ]
Signed-off-by: Wei Liu <wei.liu2@citrix.com>
2017-09-13 09:40:46 +01:00

560 lines
19 KiB
C
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/*
* Copyright (C) 2016 SUSE Linux GmbH
* Author Juergen Gross <jgross@suse.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation; version 2.1 only. with the special
* exception on linking described in file LICENSE.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*/
#include "libxl_osdeps.h"
#include "libxl_internal.h"
int libxl_mac_to_device_nic(libxl_ctx *ctx, uint32_t domid,
const char *mac, libxl_device_nic *nic)
{
GC_INIT(ctx);
libxl_device_nic *nics;
int nb, rc, i;
libxl_mac mac_n;
rc = libxl__parse_mac(mac, mac_n);
if (rc)
return rc;
nics = libxl__device_list(gc, &libxl__nic_devtype, domid, "vif", &nb);
if (!nics)
return ERROR_FAIL;
memset(nic, 0, sizeof (libxl_device_nic));
rc = ERROR_INVAL;
for (i = 0; i < nb; ++i) {
if (!libxl__compare_macs(&mac_n, &nics[i].mac)) {
*nic = nics[i];
rc = 0;
i++; /* Do not dispose this NIC on exit path */
break;
}
libxl_device_nic_dispose(&nics[i]);
}
for (; i<nb; i++)
libxl_device_nic_dispose(&nics[i]);
free(nics);
return rc;
}
static int libxl__device_nic_setdefault(libxl__gc *gc, uint32_t domid,
libxl_device_nic *nic, bool hotplug)
{
int rc;
if (!nic->mtu)
nic->mtu = 1492;
if (!nic->model) {
nic->model = strdup("rtl8139");
if (!nic->model) return ERROR_NOMEM;
}
if (libxl__mac_is_default(&nic->mac)) {
const uint8_t *r;
libxl_uuid uuid;
libxl_uuid_generate(&uuid);
r = libxl_uuid_bytearray(&uuid);
nic->mac[0] = 0x00;
nic->mac[1] = 0x16;
nic->mac[2] = 0x3e;
nic->mac[3] = r[0] & 0x7f;
nic->mac[4] = r[1];
nic->mac[5] = r[2];
}
if (!nic->bridge) {
nic->bridge = strdup("xenbr0");
if (!nic->bridge) return ERROR_NOMEM;
}
if ( !nic->script && asprintf(&nic->script, "%s/vif-bridge",
libxl__xen_script_dir_path()) < 0 )
return ERROR_FAIL;
rc = libxl__resolve_domid(gc, nic->backend_domname, &nic->backend_domid);
if (rc < 0) return rc;
switch (libxl__domain_type(gc, domid)) {
case LIBXL_DOMAIN_TYPE_HVM:
if (!nic->nictype) {
if (hotplug ||
(libxl__device_model_version_running(gc, domid) ==
LIBXL_DEVICE_MODEL_VERSION_NONE))
nic->nictype = LIBXL_NIC_TYPE_VIF;
else
nic->nictype = LIBXL_NIC_TYPE_VIF_IOEMU;
}
break;
case LIBXL_DOMAIN_TYPE_PV:
if (nic->nictype == LIBXL_NIC_TYPE_VIF_IOEMU) {
LOGD(ERROR, domid,
"trying to create PV guest with an emulated interface");
return ERROR_INVAL;
}
nic->nictype = LIBXL_NIC_TYPE_VIF;
break;
case LIBXL_DOMAIN_TYPE_INVALID:
return ERROR_FAIL;
default:
abort();
}
return rc;
}
static int libxl__device_from_nic(libxl__gc *gc, uint32_t domid,
libxl_device_nic *nic,
libxl__device *device)
{
device->backend_devid = nic->devid;
device->backend_domid = nic->backend_domid;
device->backend_kind = LIBXL__DEVICE_KIND_VIF;
device->devid = nic->devid;
device->domid = domid;
device->kind = LIBXL__DEVICE_KIND_VIF;
return 0;
}
static void libxl__update_config_nic(libxl__gc *gc, libxl_device_nic *dst,
const libxl_device_nic *src)
{
dst->devid = src->devid;
dst->nictype = src->nictype;
libxl_mac_copy(CTX, &dst->mac, &src->mac);
}
static LIBXL_DEFINE_UPDATE_DEVID(nic, "vif")
static int libxl__set_xenstore_nic(libxl__gc *gc, uint32_t domid,
libxl_device_nic *nic,
flexarray_t *back, flexarray_t *front,
flexarray_t *ro_front)
{
flexarray_grow(back, 2);
if (nic->script)
flexarray_append_pair(back, "script",
libxl__abs_path(gc, nic->script,
libxl__xen_script_dir_path()));
if (nic->ifname) {
flexarray_append(back, "vifname");
flexarray_append(back, nic->ifname);
}
if (nic->coloft_forwarddev) {
flexarray_append(back, "forwarddev");
flexarray_append(back, nic->coloft_forwarddev);
}
#define MAYBE_ADD_COLO_ARGS(arg) ({ \
if (nic->colo_##arg) { \
flexarray_append(back, "colo_"#arg); \
flexarray_append(back, nic->colo_##arg); \
} \
})
MAYBE_ADD_COLO_ARGS(sock_mirror_id);
MAYBE_ADD_COLO_ARGS(sock_mirror_ip);
MAYBE_ADD_COLO_ARGS(sock_mirror_port);
MAYBE_ADD_COLO_ARGS(sock_compare_pri_in_id);
MAYBE_ADD_COLO_ARGS(sock_compare_pri_in_ip);
MAYBE_ADD_COLO_ARGS(sock_compare_pri_in_port);
MAYBE_ADD_COLO_ARGS(sock_compare_sec_in_id);
MAYBE_ADD_COLO_ARGS(sock_compare_sec_in_ip);
MAYBE_ADD_COLO_ARGS(sock_compare_sec_in_port);
MAYBE_ADD_COLO_ARGS(sock_compare_notify_id);
MAYBE_ADD_COLO_ARGS(sock_compare_notify_ip);
MAYBE_ADD_COLO_ARGS(sock_compare_notify_port);
MAYBE_ADD_COLO_ARGS(sock_redirector0_id);
MAYBE_ADD_COLO_ARGS(sock_redirector0_ip);
MAYBE_ADD_COLO_ARGS(sock_redirector0_port);
MAYBE_ADD_COLO_ARGS(sock_redirector1_id);
MAYBE_ADD_COLO_ARGS(sock_redirector1_ip);
MAYBE_ADD_COLO_ARGS(sock_redirector1_port);
MAYBE_ADD_COLO_ARGS(sock_redirector2_id);
MAYBE_ADD_COLO_ARGS(sock_redirector2_ip);
MAYBE_ADD_COLO_ARGS(sock_redirector2_port);
MAYBE_ADD_COLO_ARGS(filter_mirror_queue);
MAYBE_ADD_COLO_ARGS(filter_mirror_outdev);
MAYBE_ADD_COLO_ARGS(filter_redirector0_queue);
MAYBE_ADD_COLO_ARGS(filter_redirector0_indev);
MAYBE_ADD_COLO_ARGS(filter_redirector0_outdev);
MAYBE_ADD_COLO_ARGS(filter_redirector1_queue);
MAYBE_ADD_COLO_ARGS(filter_redirector1_indev);
MAYBE_ADD_COLO_ARGS(filter_redirector1_outdev);
MAYBE_ADD_COLO_ARGS(compare_pri_in);
MAYBE_ADD_COLO_ARGS(compare_sec_in);
MAYBE_ADD_COLO_ARGS(compare_out);
MAYBE_ADD_COLO_ARGS(compare_notify_dev);
MAYBE_ADD_COLO_ARGS(sock_sec_redirector0_id);
MAYBE_ADD_COLO_ARGS(sock_sec_redirector0_ip);
MAYBE_ADD_COLO_ARGS(sock_sec_redirector0_port);
MAYBE_ADD_COLO_ARGS(sock_sec_redirector1_id);
MAYBE_ADD_COLO_ARGS(sock_sec_redirector1_ip);
MAYBE_ADD_COLO_ARGS(sock_sec_redirector1_port);
MAYBE_ADD_COLO_ARGS(filter_sec_redirector0_queue);
MAYBE_ADD_COLO_ARGS(filter_sec_redirector0_indev);
MAYBE_ADD_COLO_ARGS(filter_sec_redirector0_outdev);
MAYBE_ADD_COLO_ARGS(filter_sec_redirector1_queue);
MAYBE_ADD_COLO_ARGS(filter_sec_redirector1_indev);
MAYBE_ADD_COLO_ARGS(filter_sec_redirector1_outdev);
MAYBE_ADD_COLO_ARGS(filter_sec_rewriter0_queue);
MAYBE_ADD_COLO_ARGS(checkpoint_host);
MAYBE_ADD_COLO_ARGS(checkpoint_port);
#undef MAYBE_ADD_COLO_ARGS
flexarray_append(back, "mac");
flexarray_append(back,GCSPRINTF(LIBXL_MAC_FMT, LIBXL_MAC_BYTES(nic->mac)));
if (nic->ip) {
flexarray_append(back, "ip");
flexarray_append(back, libxl__strdup(gc, nic->ip));
}
if (nic->gatewaydev) {
flexarray_append(back, "gatewaydev");
flexarray_append(back, libxl__strdup(gc, nic->gatewaydev));
}
if (nic->rate_interval_usecs > 0) {
flexarray_append(back, "rate");
flexarray_append(back, GCSPRINTF("%"PRIu64",%"PRIu32"",
nic->rate_bytes_per_interval,
nic->rate_interval_usecs));
}
flexarray_append(back, "bridge");
flexarray_append(back, libxl__strdup(gc, nic->bridge));
flexarray_append(back, "handle");
flexarray_append(back, GCSPRINTF("%d", nic->devid));
flexarray_append(back, "type");
flexarray_append(back, libxl__strdup(gc,
libxl_nic_type_to_string(nic->nictype)));
flexarray_append(front, "handle");
flexarray_append(front, GCSPRINTF("%d", nic->devid));
flexarray_append(front, "mac");
flexarray_append(front, GCSPRINTF(
LIBXL_MAC_FMT, LIBXL_MAC_BYTES(nic->mac)));
return 0;
}
static void libxl__device_nic_add(libxl__egc *egc, uint32_t domid,
libxl_device_nic *nic,
libxl__ao_device *aodev)
{
libxl__device_add_async(egc, domid, &libxl__nic_devtype, nic, aodev);
}
static int libxl__nic_from_xenstore(libxl__gc *gc, const char *libxl_path,
libxl_devid devid, libxl_device_nic *nic)
{
const char *tmp;
int rc;
libxl_device_nic_init(nic);
rc = libxl__xs_read_checked(gc, XBT_NULL,
GCSPRINTF("%s/handle", libxl_path), &tmp);
if (rc) goto out;
if (tmp)
nic->devid = atoi(tmp);
else
nic->devid = 0;
rc = libxl__xs_read_checked(gc, XBT_NULL,
GCSPRINTF("%s/backend", libxl_path), &tmp);
if (rc) goto out;
if (!tmp) {
LOG(ERROR, "nic %s does not exist (no backend path)", libxl_path);
rc = ERROR_FAIL;
goto out;
}
rc = libxl__backendpath_parse_domid(gc, tmp, &nic->backend_domid);
if (rc) goto out;
/* nic->mtu = */
rc = libxl__xs_read_checked(gc, XBT_NULL,
GCSPRINTF("%s/mac", libxl_path), &tmp);
if (rc) goto out;
if (tmp) {
rc = libxl__parse_mac(tmp, nic->mac);
if (rc) goto out;
} else {
memset(nic->mac, 0, sizeof(nic->mac));
}
rc = libxl__xs_read_checked(NOGC, XBT_NULL,
GCSPRINTF("%s/ip", libxl_path),
(const char **)(&nic->ip));
if (rc) goto out;
rc = libxl__xs_read_checked(NOGC, XBT_NULL,
GCSPRINTF("%s/bridge", libxl_path),
(const char **)(&nic->bridge));
if (rc) goto out;
rc = libxl__xs_read_checked(NOGC, XBT_NULL,
GCSPRINTF("%s/script", libxl_path),
(const char **)(&nic->script));
if (rc) goto out;
rc = libxl__xs_read_checked(NOGC, XBT_NULL,
GCSPRINTF("%s/forwarddev", libxl_path),
(const char **)(&nic->coloft_forwarddev));
if (rc) goto out;
#define CHECK_COLO_ARGS(arg) ({ \
rc = libxl__xs_read_checked(NOGC, XBT_NULL, \
GCSPRINTF("%s/colo_"#arg, libxl_path), \
(const char **)(&nic->colo_##arg)); \
if (rc) goto out; \
})
CHECK_COLO_ARGS(sock_mirror_id);
CHECK_COLO_ARGS(sock_mirror_ip);
CHECK_COLO_ARGS(sock_mirror_port);
CHECK_COLO_ARGS(sock_compare_pri_in_id);
CHECK_COLO_ARGS(sock_compare_pri_in_ip);
CHECK_COLO_ARGS(sock_compare_pri_in_port);
CHECK_COLO_ARGS(sock_compare_sec_in_id);
CHECK_COLO_ARGS(sock_compare_sec_in_ip);
CHECK_COLO_ARGS(sock_compare_sec_in_port);
CHECK_COLO_ARGS(sock_compare_notify_id);
CHECK_COLO_ARGS(sock_compare_notify_ip);
CHECK_COLO_ARGS(sock_compare_notify_port);
CHECK_COLO_ARGS(sock_redirector0_id);
CHECK_COLO_ARGS(sock_redirector0_ip);
CHECK_COLO_ARGS(sock_redirector0_port);
CHECK_COLO_ARGS(sock_redirector1_id);
CHECK_COLO_ARGS(sock_redirector1_ip);
CHECK_COLO_ARGS(sock_redirector1_port);
CHECK_COLO_ARGS(sock_redirector2_id);
CHECK_COLO_ARGS(sock_redirector2_ip);
CHECK_COLO_ARGS(sock_redirector2_port);
CHECK_COLO_ARGS(filter_mirror_queue);
CHECK_COLO_ARGS(filter_mirror_outdev);
CHECK_COLO_ARGS(filter_redirector0_queue);
CHECK_COLO_ARGS(filter_redirector0_indev);
CHECK_COLO_ARGS(filter_redirector0_outdev);
CHECK_COLO_ARGS(filter_redirector1_queue);
CHECK_COLO_ARGS(filter_redirector1_indev);
CHECK_COLO_ARGS(filter_redirector1_outdev);
CHECK_COLO_ARGS(compare_pri_in);
CHECK_COLO_ARGS(compare_sec_in);
CHECK_COLO_ARGS(compare_out);
CHECK_COLO_ARGS(compare_notify_dev);
CHECK_COLO_ARGS(sock_sec_redirector0_id);
CHECK_COLO_ARGS(sock_sec_redirector0_ip);
CHECK_COLO_ARGS(sock_sec_redirector0_port);
CHECK_COLO_ARGS(sock_sec_redirector1_id);
CHECK_COLO_ARGS(sock_sec_redirector1_ip);
CHECK_COLO_ARGS(sock_sec_redirector1_port);
CHECK_COLO_ARGS(filter_sec_redirector0_queue);
CHECK_COLO_ARGS(filter_sec_redirector0_indev);
CHECK_COLO_ARGS(filter_sec_redirector0_outdev);
CHECK_COLO_ARGS(filter_sec_redirector1_queue);
CHECK_COLO_ARGS(filter_sec_redirector1_indev);
CHECK_COLO_ARGS(filter_sec_redirector1_outdev);
CHECK_COLO_ARGS(filter_sec_rewriter0_queue);
CHECK_COLO_ARGS(checkpoint_host);
CHECK_COLO_ARGS(checkpoint_port);
#undef CHECK_COLO_ARGS
/* vif_ioemu nics use the same xenstore entries as vif interfaces */
rc = libxl__xs_read_checked(gc, XBT_NULL,
GCSPRINTF("%s/type", libxl_path), &tmp);
if (rc) goto out;
if (tmp) {
rc = libxl_nic_type_from_string(tmp, &nic->nictype);
if (rc) goto out;
} else {
nic->nictype = LIBXL_NIC_TYPE_VIF;
}
nic->model = NULL; /* XXX Only for TYPE_IOEMU */
nic->ifname = NULL; /* XXX Only for TYPE_IOEMU */
rc = 0;
out:
return rc;
}
int libxl_devid_to_device_nic(libxl_ctx *ctx, uint32_t domid,
int devid, libxl_device_nic *nic)
{
GC_INIT(ctx);
char *libxl_dom_path, *libxl_path;
int rc = ERROR_FAIL;
libxl_device_nic_init(nic);
libxl_dom_path = libxl__xs_libxl_path(gc, domid);
if (!libxl_dom_path)
goto out;
libxl_path = GCSPRINTF("%s/device/vif/%d", libxl_dom_path, devid);
rc = libxl__nic_from_xenstore(gc, libxl_path, devid, nic);
if (rc) goto out;
rc = 0;
out:
GC_FREE;
return rc;
}
libxl_device_nic *libxl_device_nic_list(libxl_ctx *ctx, uint32_t domid, int *num)
{
libxl_device_nic *r;
GC_INIT(ctx);
r = libxl__device_list(gc, &libxl__nic_devtype, domid, "vif", num);
GC_FREE;
return r;
}
void libxl_device_nic_list_free(libxl_device_nic* list, int num)
{
libxl__device_list_free(&libxl__nic_devtype, list, num);
}
int libxl_device_nic_getinfo(libxl_ctx *ctx, uint32_t domid,
libxl_device_nic *nic, libxl_nicinfo *nicinfo)
{
GC_INIT(ctx);
char *dompath, *nicpath, *libxl_path;
char *val;
int rc;
dompath = libxl__xs_get_dompath(gc, domid);
nicinfo->devid = nic->devid;
nicpath = GCSPRINTF("%s/device/vif/%d", dompath, nicinfo->devid);
libxl_path = GCSPRINTF("%s/device/vif/%d",
libxl__xs_libxl_path(gc, domid), nicinfo->devid);
nicinfo->backend = xs_read(ctx->xsh, XBT_NULL,
GCSPRINTF("%s/backend", libxl_path), NULL);
if (!nicinfo->backend) {
GC_FREE;
return ERROR_FAIL;
}
rc = libxl__backendpath_parse_domid(gc, nicinfo->backend,
&nicinfo->backend_id);
if (rc) goto out;
val = libxl__xs_read(gc, XBT_NULL, GCSPRINTF("%s/state", nicpath));
nicinfo->state = val ? strtoul(val, NULL, 10) : -1;
val = libxl__xs_read(gc, XBT_NULL, GCSPRINTF("%s/event-channel", nicpath));
nicinfo->evtch = val ? strtoul(val, NULL, 10) : -1;
val = libxl__xs_read(gc, XBT_NULL, GCSPRINTF("%s/tx-ring-ref", nicpath));
nicinfo->rref_tx = val ? strtoul(val, NULL, 10) : -1;
val = libxl__xs_read(gc, XBT_NULL, GCSPRINTF("%s/rx-ring-ref", nicpath));
nicinfo->rref_rx = val ? strtoul(val, NULL, 10) : -1;
nicinfo->frontend = libxl__strdup(NOGC, nicpath);
nicinfo->frontend_id = domid;
rc = 0;
out:
GC_FREE;
return rc;
}
const char *libxl__device_nic_devname(libxl__gc *gc,
uint32_t domid,
uint32_t devid,
libxl_nic_type type)
{
switch (type) {
case LIBXL_NIC_TYPE_VIF:
return GCSPRINTF(NETBACK_NIC_NAME, domid, devid);
case LIBXL_NIC_TYPE_VIF_IOEMU:
return GCSPRINTF(NETBACK_NIC_NAME TAP_DEVICE_SUFFIX, domid, devid);
default:
abort();
}
}
static int libxl_device_nic_compare(libxl_device_nic *d1,
libxl_device_nic *d2)
{
return COMPARE_DEVID(d1, d2);
}
static void libxl_device_nic_update_config(libxl__gc *gc, void *d, void *s)
{
libxl__update_config_nic(gc, d, s);
}
int libxl__device_nic_set_devids(libxl__gc *gc, libxl_domain_config *d_config,
uint32_t domid)
{
int ret = 0;
int i;
size_t last_devid = -1;
for (i = 0; i < d_config->num_nics; i++) {
/* We have to init the nic here, because we still haven't
* called libxl_device_nic_add when domcreate_launch_dm gets called,
* but qemu needs the nic information to be complete.
*/
ret = libxl__device_nic_setdefault(gc, domid, &d_config->nics[i],
false);
if (ret) {
LOGD(ERROR, domid, "Unable to set nic defaults for nic %d", i);
goto out;
}
if (d_config->nics[i].devid > last_devid)
last_devid = d_config->nics[i].devid;
}
for (i = 0; i < d_config->num_nics; i++) {
if (d_config->nics[i].devid < 0)
d_config->nics[i].devid = ++last_devid;
}
out:
return ret;
}
LIBXL_DEFINE_DEVICE_ADD(nic)
LIBXL_DEFINE_DEVICES_ADD(nic)
LIBXL_DEFINE_DEVICE_REMOVE(nic)
DEFINE_DEVICE_TYPE_STRUCT(nic,
.update_config = libxl_device_nic_update_config,
.from_xenstore = (int (*)(libxl__gc *, const char *, libxl_devid, void *))
libxl__nic_from_xenstore,
.set_xenstore_config = (int (*)(libxl__gc *, uint32_t, void *,
flexarray_t *back, flexarray_t *front,
flexarray_t *ro_front))
libxl__set_xenstore_nic
);
/*
* Local variables:
* mode: C
* c-basic-offset: 4
* indent-tabs-mode: nil
* End:
*/
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