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convert net_client_init() to OptsVisitor 

The net_client_init() prototype is kept intact.

Based on "is_netdev", the QemuOpts-rooted QemuOpt-list is parsed as a
Netdev or a NetLegacy. The original meat of net_client_init() is moved to
and simplified in net_client_init1():

Fields not common between -net and -netdev are clearly separated. Getting
the name for the init functions is cleaner: Netdev::id is mandatory, and
all init functions handle a NULL NetLegacy::name. NetLegacy::vlan
explicitly depends on -net (see below).

Verifying the "type=" option for -netdev can be turned into a switch.

Format validation with qemu_opts_validate() can be removed because the
visitor covers it. Relatedly, the "net_client_types" array is reduced to
an array of init functions that can be directly indexed by opts->kind.
(Help text is available in the schema JSON.)

The outermost negation in the condition around qemu_find_vlan() was
flattened, because it expresses the dependent code's requirements more
clearly.

VLAN lookup is avoided if there's no init function to pass the VLAN to.

Whenever the value of type=... is needed, we substitute
NetClientOptionsKind_lookup[kind].

The individual init functions are not converted yet, thus the original
QemuOpts instance is passed transparently.

v1->v2:
- NetLegacy::name is optional. Tracked it through all init functions: they
  all handle a NULL name. Updated commit message accordingly.

v2->v3:
- NetLegacy::id is allowed and takes precedence over NetLegacy::name.

Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
pull/92/head
Laszlo Ersek 14 years ago
committed by Stefan Hajnoczi
parent
2be64a68ed
commit
6687b79d63
12 changed files with 127 additions and 346 deletions
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  1. 429
      net.c
  2. 3
      net/dump.c
  3. 4
      net/dump.h
  4. 3
      net/slirp.c
  5. 4
      net/slirp.h
  6. 3
      net/socket.c
  7. 4
      net/socket.h
  8. 3
      net/tap-win32.c
  9. 6
      net/tap.c
  10. 7
      net/tap.h
  11. 3
      net/vde.c
  12. 4
      net/vde.h

429
net.c
View File

@ -37,6 +37,9 @@
#include "qmp-commands.h"
#include "hw/qdev.h"
#include "iov.h"
#include "qapi-visit.h"
#include "qapi/opts-visitor.h"
#include "qapi/qapi-dealloc-visitor.h"
/* Net bridge is currently not supported for W32. */
#if !defined(_WIN32)
@ -745,7 +748,8 @@ int net_handle_fd_param(Monitor *mon, const char *param)
return fd;
}
static int net_init_nic(QemuOpts *opts, const char *name, VLANState *vlan)
static int net_init_nic(QemuOpts *opts, const NetClientOptions *new_opts,
const char *name, VLANState *vlan)
{
int idx;
NICInfo *nd;
@ -802,371 +806,130 @@ static int net_init_nic(QemuOpts *opts, const char *name, VLANState *vlan)
return idx;
}
#define NET_COMMON_PARAMS_DESC \
{ \
.name = "type", \
.type = QEMU_OPT_STRING, \
.help = "net client type (nic, tap etc.)", \
}, { \
.name = "vlan", \
.type = QEMU_OPT_NUMBER, \
.help = "vlan number", \
}, { \
.name = "name", \
.type = QEMU_OPT_STRING, \
.help = "identifier for monitor commands", \
}
typedef int (*net_client_init_func)(QemuOpts *opts,
const char *name,
VLANState *vlan);
/* magic number, but compiler will warn if too small */
#define NET_MAX_DESC 20
static const struct {
const char *type;
net_client_init_func init;
QemuOptDesc desc[NET_MAX_DESC];
} net_client_types[NET_CLIENT_OPTIONS_KIND_MAX] = {
[NET_CLIENT_OPTIONS_KIND_NONE] = {
.type = "none",
.desc = {
NET_COMMON_PARAMS_DESC,
{ /* end of list */ }
},
},
[NET_CLIENT_OPTIONS_KIND_NIC] = {
.type = "nic",
.init = net_init_nic,
.desc = {
NET_COMMON_PARAMS_DESC,
{
.name = "netdev",
.type = QEMU_OPT_STRING,
.help = "id of -netdev to connect to",
},
{
.name = "macaddr",
.type = QEMU_OPT_STRING,
.help = "MAC address",
}, {
.name = "model",
.type = QEMU_OPT_STRING,
.help = "device model (e1000, rtl8139, virtio etc.)",
}, {
.name = "addr",
.type = QEMU_OPT_STRING,
.help = "PCI device address",
}, {
.name = "vectors",
.type = QEMU_OPT_NUMBER,
.help = "number of MSI-x vectors, 0 to disable MSI-X",
},
{ /* end of list */ }
},
},
static int (* const net_client_init_fun[NET_CLIENT_OPTIONS_KIND_MAX])(
QemuOpts *old_opts,
const NetClientOptions *new_opts,
const char *name,
VLANState *vlan) = {
[NET_CLIENT_OPTIONS_KIND_NIC] = net_init_nic,
#ifdef CONFIG_SLIRP
[NET_CLIENT_OPTIONS_KIND_USER] = {
.type = "user",
.init = net_init_slirp,
.desc = {
NET_COMMON_PARAMS_DESC,
{
.name = "hostname",
.type = QEMU_OPT_STRING,
.help = "client hostname reported by the builtin DHCP server",
}, {
.name = "restrict",
.type = QEMU_OPT_STRING,
.help = "isolate the guest from the host (y|yes|n|no)",
}, {
.name = "ip",
.type = QEMU_OPT_STRING,
.help = "legacy parameter, use net= instead",
}, {
.name = "net",
.type = QEMU_OPT_STRING,
.help = "IP address and optional netmask",
}, {
.name = "host",
.type = QEMU_OPT_STRING,
.help = "guest-visible address of the host",
}, {
.name = "tftp",
.type = QEMU_OPT_STRING,
.help = "root directory of the built-in TFTP server",
}, {
.name = "bootfile",
.type = QEMU_OPT_STRING,
.help = "BOOTP filename, for use with tftp=",
}, {
.name = "dhcpstart",
.type = QEMU_OPT_STRING,
.help = "the first of the 16 IPs the built-in DHCP server can assign",
}, {
.name = "dns",
.type = QEMU_OPT_STRING,
.help = "guest-visible address of the virtual nameserver",
}, {
.name = "smb",
.type = QEMU_OPT_STRING,
.help = "root directory of the built-in SMB server",
}, {
.name = "smbserver",
.type = QEMU_OPT_STRING,
.help = "IP address of the built-in SMB server",
}, {
.name = "hostfwd",
.type = QEMU_OPT_STRING,
.help = "guest port number to forward incoming TCP or UDP connections",
}, {
.name = "guestfwd",
.type = QEMU_OPT_STRING,
.help = "IP address and port to forward guest TCP connections",
},
{ /* end of list */ }
},
},
#endif
[NET_CLIENT_OPTIONS_KIND_TAP] = {
.type = "tap",
.init = net_init_tap,
.desc = {
NET_COMMON_PARAMS_DESC,
{
.name = "ifname",
.type = QEMU_OPT_STRING,
.help = "interface name",
},
#ifndef _WIN32
{
.name = "fd",
.type = QEMU_OPT_STRING,
.help = "file descriptor of an already opened tap",
}, {
.name = "script",
.type = QEMU_OPT_STRING,
.help = "script to initialize the interface",
}, {
.name = "downscript",
.type = QEMU_OPT_STRING,
.help = "script to shut down the interface",
}, {
#ifdef CONFIG_NET_BRIDGE
.name = "helper",
.type = QEMU_OPT_STRING,
.help = "command to execute to configure bridge",
}, {
[NET_CLIENT_OPTIONS_KIND_USER] = net_init_slirp,
#endif
.name = "sndbuf",
.type = QEMU_OPT_SIZE,
.help = "send buffer limit"
}, {
.name = "vnet_hdr",
.type = QEMU_OPT_BOOL,
.help = "enable the IFF_VNET_HDR flag on the tap interface"
}, {
.name = "vhost",
.type = QEMU_OPT_BOOL,
.help = "enable vhost-net network accelerator",
}, {
.name = "vhostfd",
.type = QEMU_OPT_STRING,
.help = "file descriptor of an already opened vhost net device",
}, {
.name = "vhostforce",
.type = QEMU_OPT_BOOL,
.help = "force vhost on for non-MSIX virtio guests",
},
#endif /* _WIN32 */
{ /* end of list */ }
},
},
[NET_CLIENT_OPTIONS_KIND_SOCKET] = {
.type = "socket",
.init = net_init_socket,
.desc = {
NET_COMMON_PARAMS_DESC,
{
.name = "fd",
.type = QEMU_OPT_STRING,
.help = "file descriptor of an already opened socket",
}, {
.name = "listen",
.type = QEMU_OPT_STRING,
.help = "port number, and optional hostname, to listen on",
}, {
.name = "connect",
.type = QEMU_OPT_STRING,
.help = "port number, and optional hostname, to connect to",
}, {
.name = "mcast",
.type = QEMU_OPT_STRING,
.help = "UDP multicast address and port number",
}, {
.name = "localaddr",
.type = QEMU_OPT_STRING,
.help = "source address and port for multicast and udp packets",
}, {
.name = "udp",
.type = QEMU_OPT_STRING,
.help = "UDP unicast address and port number",
},
{ /* end of list */ }
},
},
[NET_CLIENT_OPTIONS_KIND_TAP] = net_init_tap,
[NET_CLIENT_OPTIONS_KIND_SOCKET] = net_init_socket,
#ifdef CONFIG_VDE
[NET_CLIENT_OPTIONS_KIND_VDE] = {
.type = "vde",
.init = net_init_vde,
.desc = {
NET_COMMON_PARAMS_DESC,
{
.name = "sock",
.type = QEMU_OPT_STRING,
.help = "socket path",
}, {
.name = "port",
.type = QEMU_OPT_NUMBER,
.help = "port number",
}, {
.name = "group",
.type = QEMU_OPT_STRING,
.help = "group owner of socket",
}, {
.name = "mode",
.type = QEMU_OPT_NUMBER,
.help = "permissions for socket",
},
{ /* end of list */ }
},
},
[NET_CLIENT_OPTIONS_KIND_VDE] = net_init_vde,
#endif
[NET_CLIENT_OPTIONS_KIND_DUMP] = {
.type = "dump",
.init = net_init_dump,
.desc = {
NET_COMMON_PARAMS_DESC,
{
.name = "len",
.type = QEMU_OPT_SIZE,
.help = "per-packet size limit (64k default)",
}, {
.name = "file",
.type = QEMU_OPT_STRING,
.help = "dump file path (default is qemu-vlan0.pcap)",
},
{ /* end of list */ }
},
},
[NET_CLIENT_OPTIONS_KIND_DUMP] = net_init_dump,
#ifdef CONFIG_NET_BRIDGE
[NET_CLIENT_OPTIONS_KIND_BRIDGE] = {
.type = "bridge",
.init = net_init_bridge,
.desc = {
NET_COMMON_PARAMS_DESC,
{
.name = "br",
.type = QEMU_OPT_STRING,
.help = "bridge name",
}, {
.name = "helper",
.type = QEMU_OPT_STRING,
.help = "command to execute to configure bridge",
},
{ /* end of list */ }
},
},
#endif /* CONFIG_NET_BRIDGE */
[NET_CLIENT_OPTIONS_KIND_BRIDGE] = net_init_bridge,
#endif
};
int net_client_init(QemuOpts *opts, int is_netdev, Error **errp)
static int net_client_init1(const void *object, int is_netdev,
QemuOpts *old_opts, Error **errp)
{
union {
const Netdev *netdev;
const NetLegacy *net;
} u;
const NetClientOptions *opts;
const char *name;
const char *type;
int i;
type = qemu_opt_get(opts, "type");
if (!type) {
error_set(errp, QERR_MISSING_PARAMETER, "type");
return -1;
}
if (is_netdev) {
if (strcmp(type, "tap") != 0 &&
#ifdef CONFIG_NET_BRIDGE
strcmp(type, "bridge") != 0 &&
#endif
u.netdev = object;
opts = u.netdev->opts;
name = u.netdev->id;
switch (opts->kind) {
#ifdef CONFIG_SLIRP
strcmp(type, "user") != 0 &&
case NET_CLIENT_OPTIONS_KIND_USER:
#endif
case NET_CLIENT_OPTIONS_KIND_TAP:
case NET_CLIENT_OPTIONS_KIND_SOCKET:
#ifdef CONFIG_VDE
strcmp(type, "vde") != 0 &&
case NET_CLIENT_OPTIONS_KIND_VDE:
#endif
#ifdef CONFIG_NET_BRIDGE
case NET_CLIENT_OPTIONS_KIND_BRIDGE:
#endif
strcmp(type, "socket") != 0) {
break;
default:
error_set(errp, QERR_INVALID_PARAMETER_VALUE, "type",
"a netdev backend type");
return -1;
}
} else {
u.net = object;
opts = u.net->opts;
/* missing optional values have been initialized to "all bits zero" */
name = u.net->has_id ? u.net->id : u.net->name;
}
if (qemu_opt_get(opts, "vlan")) {
error_set(errp, QERR_INVALID_PARAMETER, "vlan");
return -1;
}
if (qemu_opt_get(opts, "name")) {
error_set(errp, QERR_INVALID_PARAMETER, "name");
return -1;
if (net_client_init_fun[opts->kind]) {
VLANState *vlan = NULL;
/* Do not add to a vlan if it's a -netdev or a nic with a netdev=
* parameter. */
if (!is_netdev &&
(opts->kind != NET_CLIENT_OPTIONS_KIND_NIC ||
!opts->nic->has_netdev)) {
vlan = qemu_find_vlan(u.net->has_vlan ? u.net->vlan : 0, true);
}
if (!qemu_opts_id(opts)) {
error_set(errp, QERR_MISSING_PARAMETER, "id");
if (net_client_init_fun[opts->kind](old_opts, opts, name, vlan) < 0) {
/* TODO push error reporting into init() methods */
error_set(errp, QERR_DEVICE_INIT_FAILED,
NetClientOptionsKind_lookup[opts->kind]);
return -1;
}
}
return 0;
}
name = qemu_opts_id(opts);
if (!name) {
name = qemu_opt_get(opts, "name");
static void net_visit(Visitor *v, int is_netdev, void **object, Error **errp)
{
if (is_netdev) {
visit_type_Netdev(v, (Netdev **)object, NULL, errp);
} else {
visit_type_NetLegacy(v, (NetLegacy **)object, NULL, errp);
}
}
for (i = 0; i < NET_CLIENT_OPTIONS_KIND_MAX; i++) {
if (net_client_types[i].type != NULL &&
!strcmp(net_client_types[i].type, type)) {
Error *local_err = NULL;
VLANState *vlan = NULL;
int ret;
qemu_opts_validate(opts, &net_client_types[i].desc[0], &local_err);
if (error_is_set(&local_err)) {
error_propagate(errp, local_err);
return -1;
}
int net_client_init(QemuOpts *opts, int is_netdev, Error **errp)
{
void *object = NULL;
Error *err = NULL;
int ret = -1;
/* Do not add to a vlan if it's a -netdev or a nic with a
* netdev= parameter. */
if (!(is_netdev ||
(strcmp(type, "nic") == 0 && qemu_opt_get(opts, "netdev")))) {
vlan = qemu_find_vlan(qemu_opt_get_number(opts, "vlan", 0), 1);
}
{
OptsVisitor *ov = opts_visitor_new(opts);
ret = 0;
if (net_client_types[i].init) {
ret = net_client_types[i].init(opts, name, vlan);
if (ret < 0) {
/* TODO push error reporting into init() methods */
error_set(errp, QERR_DEVICE_INIT_FAILED, type);
return -1;
}
}
return ret;
}
net_visit(opts_get_visitor(ov), is_netdev, &object, &err);
opts_visitor_cleanup(ov);
}
error_set(errp, QERR_INVALID_PARAMETER_VALUE, "type",
"a network client type");
return -1;
if (!err) {
ret = net_client_init1(object, is_netdev, opts, &err);
}
if (object) {
QapiDeallocVisitor *dv = qapi_dealloc_visitor_new();
net_visit(qapi_dealloc_get_visitor(dv), is_netdev, &object, NULL);
qapi_dealloc_visitor_cleanup(dv);
}
error_propagate(errp, err);
return ret;
}
static int net_host_check_device(const char *device)
{
int i;
@ -1286,7 +1049,7 @@ void qmp_netdev_del(const char *id, Error **errp)
static void print_net_client(Monitor *mon, VLANClientState *vc)
{
monitor_printf(mon, "%s: type=%s,%s\n", vc->name,
net_client_types[vc->info->type].type, vc->info_str);
NetClientOptionsKind_lookup[vc->info->type], vc->info_str);
}
void do_info_network(Monitor *mon)

3
net/dump.c
View File

@ -144,7 +144,8 @@ static int net_dump_init(VLANState *vlan, const char *device,
return 0;
}
int net_init_dump(QemuOpts *opts, const char *name, VLANState *vlan)
int net_init_dump(QemuOpts *opts, const NetClientOptions *new_opts,
const char *name, VLANState *vlan)
{
int len;
const char *file;

4
net/dump.h
View File

@ -26,7 +26,9 @@
#include "net.h"
#include "qemu-common.h"
#include "qapi-types.h"
int net_init_dump(QemuOpts *opts, const char *name, VLANState *vlan);
int net_init_dump(QemuOpts *opts, const NetClientOptions *new_opts,
const char *name, VLANState *vlan);
#endif /* QEMU_NET_DUMP_H */

3
net/slirp.c
View File

@ -708,7 +708,8 @@ static int net_init_slirp_configs(const char *name, const char *value, void *opa
return 0;
}
int net_init_slirp(QemuOpts *opts, const char *name, VLANState *vlan)
int net_init_slirp(QemuOpts *opts, const NetClientOptions *new_opts,
const char *name, VLANState *vlan)
{
struct slirp_config_str *config;
const char *vhost;

4
net/slirp.h
View File

@ -27,10 +27,12 @@
#include "qemu-common.h"
#include "qdict.h"
#include "qemu-option.h"
#include "qapi-types.h"
#ifdef CONFIG_SLIRP
int net_init_slirp(QemuOpts *opts, const char *name, VLANState *vlan);
int net_init_slirp(QemuOpts *opts, const NetClientOptions *new_opts,
const char *name, VLANState *vlan);
void net_slirp_hostfwd_add(Monitor *mon, const QDict *qdict);
void net_slirp_hostfwd_remove(Monitor *mon, const QDict *qdict);

3
net/socket.c
View File

@ -586,7 +586,8 @@ static int net_socket_udp_init(VLANState *vlan,
return 0;
}
int net_init_socket(QemuOpts *opts, const char *name, VLANState *vlan)
int net_init_socket(QemuOpts *opts, const NetClientOptions *new_opts,
const char *name, VLANState *vlan)
{
if (qemu_opt_get(opts, "fd")) {
int fd;

4
net/socket.h
View File

@ -26,7 +26,9 @@
#include "net.h"
#include "qemu-common.h"
#include "qapi-types.h"
int net_init_socket(QemuOpts *opts, const char *name, VLANState *vlan);
int net_init_socket(QemuOpts *opts, const NetClientOptions *new_opts,
const char *name, VLANState *vlan);
#endif /* QEMU_NET_SOCKET_H */

3
net/tap-win32.c
View File

@ -699,7 +699,8 @@ static int tap_win32_init(VLANState *vlan, const char *model,
return 0;
}
int net_init_tap(QemuOpts *opts, const char *name, VLANState *vlan)
int net_init_tap(QemuOpts *opts, const NetClientOptions *new_opts,
const char *name, VLANState *vlan)
{
const char *ifname;

6
net/tap.c
View File

@ -513,7 +513,8 @@ static int net_bridge_run_helper(const char *helper, const char *bridge)
return -1;
}
int net_init_bridge(QemuOpts *opts, const char *name, VLANState *vlan)
int net_init_bridge(QemuOpts *opts, const NetClientOptions *new_opts,
const char *name, VLANState *vlan)
{
TAPState *s;
int fd, vnet_hdr;
@ -583,7 +584,8 @@ static int net_tap_init(QemuOpts *opts, int *vnet_hdr)
return fd;
}
int net_init_tap(QemuOpts *opts, const char *name, VLANState *vlan)
int net_init_tap(QemuOpts *opts, const NetClientOptions *new_opts,
const char *name, VLANState *vlan)
{
TAPState *s;
int fd, vnet_hdr = 0;

7
net/tap.h
View File

@ -28,11 +28,13 @@
#include "qemu-common.h"
#include "qemu-option.h"
#include "qapi-types.h"
#define DEFAULT_NETWORK_SCRIPT "/etc/qemu-ifup"
#define DEFAULT_NETWORK_DOWN_SCRIPT "/etc/qemu-ifdown"
int net_init_tap(QemuOpts *opts, const char *name, VLANState *vlan);
int net_init_tap(QemuOpts *opts, const NetClientOptions *new_opts,
const char *name, VLANState *vlan);
int tap_open(char *ifname, int ifname_size, int *vnet_hdr, int vnet_hdr_required);
@ -57,6 +59,7 @@ int tap_get_fd(VLANClientState *vc);
struct vhost_net;
struct vhost_net *tap_get_vhost_net(VLANClientState *vc);
int net_init_bridge(QemuOpts *opts, const char *name, VLANState *vlan);
int net_init_bridge(QemuOpts *opts, const NetClientOptions *new_opts,
const char *name, VLANState *vlan);
#endif /* QEMU_NET_TAP_H */

3
net/vde.c
View File

@ -110,7 +110,8 @@ static int net_vde_init(VLANState *vlan, const char *model,
return 0;
}
int net_init_vde(QemuOpts *opts, const char *name, VLANState *vlan)
int net_init_vde(QemuOpts *opts, const NetClientOptions *new_opts,
const char *name, VLANState *vlan)
{
const char *sock;
const char *group;

4
net/vde.h
View File

@ -26,10 +26,12 @@
#include "qemu-common.h"
#include "qemu-option.h"
#include "qapi-types.h"
#ifdef CONFIG_VDE
int net_init_vde(QemuOpts *opts, const char *name, VLANState *vlan);
int net_init_vde(QemuOpts *opts, const NetClientOptions *new_opts,
const char *name, VLANState *vlan);
#endif /* CONFIG_VDE */

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