* [PATCH v8 00/14] qapi: net: add unix socket type support to netdev backend
@ 2022-09-13 6:39 Laurent Vivier
2022-09-13 6:39 ` [PATCH v8 01/14] net: introduce convert_host_port() Laurent Vivier
` (14 more replies)
0 siblings, 15 replies; 31+ messages in thread
From: Laurent Vivier @ 2022-09-13 6:39 UTC (permalink / raw)
To: qemu-devel
Cc: Jason Wang, Paolo Bonzini, Gregory Kurz, Daniel P. Berrangé,
Laurent Vivier, Eric Blake, Markus Armbruster, Thomas Huth,
David Gibson, Dr. David Alan Gilbert, Ralph Schmieder,
Stefano Brivio
"-netdev socket" only supports inet sockets.
It's not a complex task to add support for unix sockets, but
the socket netdev parameters are not defined to manage well unix
socket parameters.
As discussed in:
"socket.c added support for unix domain socket datagram transport"
https://lore.kernel.org/qemu-devel/1C0E1BC5-904F-46B0-8044-68E43E67BE60@gmail.com/
This series adds support of unix socket type using SocketAddress QAPI structure.
Two new netdev backends, "stream" and "dgram" are added, that are barely a copy of "socket"
backend but they use the SocketAddress QAPI to provide socket parameters.
And then they also implement unix sockets (TCP and UDP).
Some examples of CLI syntax:
for TCP:
-netdev stream,id=socket0,addr.type=inet,addr.host=localhost,addr.port=1234
-netdev stream,id=socket0,server=off,addr.type=inet,addr.host=localhost,addr.port=1234
-netdev dgram,id=socket0,\
local.type=inet,local.host=localhost,local.port=1234,\
remote.type=inet,remote.host=localhost,remote.port=1235
for UNIX:
-netdev stream,id=socket0,addr.type=unix,addr.path=/tmp/qemu0
-netdev stream,id=socket0,server=off,addr.type=unix,addr.path=/tmp/qemu0
-netdev dgram,id=socket0,\
local.type=unix,local.path=/tmp/qemu0,\
remote.type=unix,remote.path=/tmp/qemu1
for FD:
-netdev stream,id=socket0,addr.type=fd,addr.str=4
-netdev stream,id=socket0,server=off,addr.type=fd,addr.str=5
-netdev dgram,id=socket0,local.type=fd,addr.str=4
v8:
- test ipv4 and ipv6 parameters (stream inet)
- test abstract parameter (stream unix)
- add SocketAddressInet supported parameters in qemu-options.hx
(only stream, supported by the move to QIO)
- with qio_channel_writev() replace (ret == -1 && errno == EAGAIN)
by (ret == QIO_CHANNEL_ERR_BLOCK)
v7:
- add qtests
- update parameters table in net.json
- update socket_uri() and socket_parse()
v6:
- s/netdev option/-netdev option/ PATCH 4
- s/ / /
- update @NetdevStreamOptions and @NetdevDgramOptions comments
- update PATCH 4 description message
- add missing return in error case for unix stream socket
- split socket_uri() patch: move and rename, then change content
v5:
- remove RFC prefix
- put the change of net_client_parse() into its own patch (exit() in the
function)
- update comments regarding netdev_is_modern() and netdev_parse_modern()
- update error case in net_stream_server_init()
- update qemu-options.hx with unix type
- fix HMP "info network" with unix protocol/server side.
v4:
- net_client_parse() fails with exit() rather than with return.
- keep "{ 'name': 'vmnet-host', 'if': 'CONFIG_VMNET' }" on its
own line in qapi/net.json
- add a comment in qapi/net.json about parameters usage
- move netdev_is_modern() check to qemu_init()
- in netdev_is_modern(), check for JSON and use qemu_opts_do_parse()
to parse parameters and detect type value.
- add a blank line after copyright comment
v3:
- remove support of "-net" for dgram and stream. They are only
supported with "-netdev" option.
- use &error_fatal directly in net_client_inits()
- update qemu-options.hx
- move to QIO for stream socket
v2:
- use "stream" and "dgram" rather than "socket-ng,mode=stream"
and ""socket-ng,mode=dgram"
- extract code to bypass qemu_opts_parse_noisily() to
a new patch
- do not ignore EINVAL (Stefano)
- fix "-net" option
CC: Ralph Schmieder <ralph.schmieder@gmail.com>
CC: Stefano Brivio <sbrivio@redhat.com>
CC: Daniel P. Berrangé <berrange@redhat.com>
CC: Markus Armbruster <armbru@redhat.com>
Laurent Vivier (13):
net: introduce convert_host_port()
net: remove the @errp argument of net_client_inits()
net: simplify net_client_parse() error management
qapi: net: introduce a way to bypass qemu_opts_parse_noisily()
qapi: net: add stream and dgram netdevs
net: stream: add unix socket
net: dgram: make dgram_dst generic
net: dgram: move mcast specific code from net_socket_fd_init_dgram()
net: dgram: add unix socket
qemu-sockets: move and rename SocketAddress_to_str()
qemu-sockets: update socket_uri() and socket_parse() to be consistent
net: stream: move to QIO
tests/qtest: netdev: test stream and dgram backends
Stefano Brivio (1):
net: stream: Don't ignore EINVAL on netdev socket connection
hmp-commands.hx | 2 +-
include/net/net.h | 6 +-
include/qemu/sockets.h | 4 +-
monitor/hmp-cmds.c | 23 +-
net/clients.h | 6 +
net/dgram.c | 707 ++++++++++++++++++++++++++++++++++++
net/hub.c | 2 +
net/meson.build | 2 +
net/net.c | 169 ++++++---
net/stream.c | 376 +++++++++++++++++++
qapi/net.json | 63 +++-
qemu-options.hx | 14 +
softmmu/vl.c | 16 +-
tests/qtest/meson.build | 1 +
tests/qtest/netdev-socket.c | 391 ++++++++++++++++++++
util/qemu-sockets.c | 25 ++
16 files changed, 1725 insertions(+), 82 deletions(-)
create mode 100644 net/dgram.c
create mode 100644 net/stream.c
create mode 100644 tests/qtest/netdev-socket.c
--
2.37.3
^ permalink raw reply [flat|nested] 31+ messages in thread
* [PATCH v8 01/14] net: introduce convert_host_port()
2022-09-13 6:39 [PATCH v8 00/14] qapi: net: add unix socket type support to netdev backend Laurent Vivier
@ 2022-09-13 6:39 ` Laurent Vivier
2022-09-14 2:26 ` David Gibson
2022-09-13 6:39 ` [PATCH v8 02/14] net: remove the @errp argument of net_client_inits() Laurent Vivier
` (13 subsequent siblings)
14 siblings, 1 reply; 31+ messages in thread
From: Laurent Vivier @ 2022-09-13 6:39 UTC (permalink / raw)
To: qemu-devel
Cc: Jason Wang, Paolo Bonzini, Gregory Kurz, Daniel P. Berrangé,
Laurent Vivier, Eric Blake, Markus Armbruster, Thomas Huth,
David Gibson, Dr. David Alan Gilbert, Stefano Brivio
Signed-off-by: Laurent Vivier <lvivier@redhat.com>
Reviewed-by: Stefano Brivio <sbrivio@redhat.com>
---
include/qemu/sockets.h | 2 ++
net/net.c | 62 ++++++++++++++++++++++--------------------
2 files changed, 34 insertions(+), 30 deletions(-)
diff --git a/include/qemu/sockets.h b/include/qemu/sockets.h
index 038faa157f59..47194b9732f8 100644
--- a/include/qemu/sockets.h
+++ b/include/qemu/sockets.h
@@ -47,6 +47,8 @@ void socket_listen_cleanup(int fd, Error **errp);
int socket_dgram(SocketAddress *remote, SocketAddress *local, Error **errp);
/* Old, ipv4 only bits. Don't use for new code. */
+int convert_host_port(struct sockaddr_in *saddr, const char *host,
+ const char *port, Error **errp);
int parse_host_port(struct sockaddr_in *saddr, const char *str,
Error **errp);
int socket_init(void);
diff --git a/net/net.c b/net/net.c
index 2db160e0634d..d2288bd3a929 100644
--- a/net/net.c
+++ b/net/net.c
@@ -66,55 +66,57 @@ static QTAILQ_HEAD(, NetClientState) net_clients;
/***********************************************************/
/* network device redirectors */
-int parse_host_port(struct sockaddr_in *saddr, const char *str,
- Error **errp)
+int convert_host_port(struct sockaddr_in *saddr, const char *host,
+ const char *port, Error **errp)
{
- gchar **substrings;
struct hostent *he;
- const char *addr, *p, *r;
- int port, ret = 0;
+ const char *r;
+ long p;
memset(saddr, 0, sizeof(*saddr));
- substrings = g_strsplit(str, ":", 2);
- if (!substrings || !substrings[0] || !substrings[1]) {
- error_setg(errp, "host address '%s' doesn't contain ':' "
- "separating host from port", str);
- ret = -1;
- goto out;
- }
-
- addr = substrings[0];
- p = substrings[1];
-
saddr->sin_family = AF_INET;
- if (addr[0] == '\0') {
+ if (host[0] == '\0') {
saddr->sin_addr.s_addr = 0;
} else {
- if (qemu_isdigit(addr[0])) {
- if (!inet_aton(addr, &saddr->sin_addr)) {
+ if (qemu_isdigit(host[0])) {
+ if (!inet_aton(host, &saddr->sin_addr)) {
error_setg(errp, "host address '%s' is not a valid "
- "IPv4 address", addr);
- ret = -1;
- goto out;
+ "IPv4 address", host);
+ return -1;
}
} else {
- he = gethostbyname(addr);
+ he = gethostbyname(host);
if (he == NULL) {
- error_setg(errp, "can't resolve host address '%s'", addr);
- ret = -1;
- goto out;
+ error_setg(errp, "can't resolve host address '%s'", host);
+ return -1;
}
saddr->sin_addr = *(struct in_addr *)he->h_addr;
}
}
- port = strtol(p, (char **)&r, 0);
- if (r == p) {
- error_setg(errp, "port number '%s' is invalid", p);
+ if (qemu_strtol(port, &r, 0, &p) != 0) {
+ error_setg(errp, "port number '%s' is invalid", port);
+ return -1;
+ }
+ saddr->sin_port = htons(p);
+ return 0;
+}
+
+int parse_host_port(struct sockaddr_in *saddr, const char *str,
+ Error **errp)
+{
+ gchar **substrings;
+ int ret;
+
+ substrings = g_strsplit(str, ":", 2);
+ if (!substrings || !substrings[0] || !substrings[1]) {
+ error_setg(errp, "host address '%s' doesn't contain ':' "
+ "separating host from port", str);
ret = -1;
goto out;
}
- saddr->sin_port = htons(port);
+
+ ret = convert_host_port(saddr, substrings[0], substrings[1], errp);
out:
g_strfreev(substrings);
--
2.37.3
^ permalink raw reply related [flat|nested] 31+ messages in thread
* [PATCH v8 02/14] net: remove the @errp argument of net_client_inits()
2022-09-13 6:39 [PATCH v8 00/14] qapi: net: add unix socket type support to netdev backend Laurent Vivier
2022-09-13 6:39 ` [PATCH v8 01/14] net: introduce convert_host_port() Laurent Vivier
@ 2022-09-13 6:39 ` Laurent Vivier
2022-09-14 2:28 ` David Gibson
2022-09-13 6:39 ` [PATCH v8 03/14] net: simplify net_client_parse() error management Laurent Vivier
` (12 subsequent siblings)
14 siblings, 1 reply; 31+ messages in thread
From: Laurent Vivier @ 2022-09-13 6:39 UTC (permalink / raw)
To: qemu-devel
Cc: Jason Wang, Paolo Bonzini, Gregory Kurz, Daniel P. Berrangé,
Laurent Vivier, Eric Blake, Markus Armbruster, Thomas Huth,
David Gibson, Dr. David Alan Gilbert
The only caller passes &error_fatal, so use this directly in the function.
It's what we do for -blockdev, -device, and -object.
Suggested-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Laurent Vivier <lvivier@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
---
include/net/net.h | 2 +-
net/net.c | 20 +++++++-------------
softmmu/vl.c | 2 +-
3 files changed, 9 insertions(+), 15 deletions(-)
diff --git a/include/net/net.h b/include/net/net.h
index 81d0b21defce..c1c34a58f849 100644
--- a/include/net/net.h
+++ b/include/net/net.h
@@ -222,7 +222,7 @@ extern const char *host_net_devices[];
/* from net.c */
int net_client_parse(QemuOptsList *opts_list, const char *str);
void show_netdevs(void);
-int net_init_clients(Error **errp);
+void net_init_clients(void);
void net_check_clients(void);
void net_cleanup(void);
void hmp_host_net_add(Monitor *mon, const QDict *qdict);
diff --git a/net/net.c b/net/net.c
index d2288bd3a929..15958f881776 100644
--- a/net/net.c
+++ b/net/net.c
@@ -1562,27 +1562,21 @@ out:
return ret;
}
-int net_init_clients(Error **errp)
+void net_init_clients(void)
{
net_change_state_entry =
qemu_add_vm_change_state_handler(net_vm_change_state_handler, NULL);
QTAILQ_INIT(&net_clients);
- if (qemu_opts_foreach(qemu_find_opts("netdev"),
- net_init_netdev, NULL, errp)) {
- return -1;
- }
-
- if (qemu_opts_foreach(qemu_find_opts("nic"), net_param_nic, NULL, errp)) {
- return -1;
- }
+ qemu_opts_foreach(qemu_find_opts("netdev"), net_init_netdev, NULL,
+ &error_fatal);
- if (qemu_opts_foreach(qemu_find_opts("net"), net_init_client, NULL, errp)) {
- return -1;
- }
+ qemu_opts_foreach(qemu_find_opts("nic"), net_param_nic, NULL,
+ &error_fatal);
- return 0;
+ qemu_opts_foreach(qemu_find_opts("net"), net_init_client, NULL,
+ &error_fatal);
}
int net_client_parse(QemuOptsList *opts_list, const char *optarg)
diff --git a/softmmu/vl.c b/softmmu/vl.c
index dea4005e4791..1fe8b5c5a120 100644
--- a/softmmu/vl.c
+++ b/softmmu/vl.c
@@ -1906,7 +1906,7 @@ static void qemu_create_late_backends(void)
qtest_server_init(qtest_chrdev, qtest_log, &error_fatal);
}
- net_init_clients(&error_fatal);
+ net_init_clients();
object_option_foreach_add(object_create_late);
--
2.37.3
^ permalink raw reply related [flat|nested] 31+ messages in thread
* [PATCH v8 03/14] net: simplify net_client_parse() error management
2022-09-13 6:39 [PATCH v8 00/14] qapi: net: add unix socket type support to netdev backend Laurent Vivier
2022-09-13 6:39 ` [PATCH v8 01/14] net: introduce convert_host_port() Laurent Vivier
2022-09-13 6:39 ` [PATCH v8 02/14] net: remove the @errp argument of net_client_inits() Laurent Vivier
@ 2022-09-13 6:39 ` Laurent Vivier
2022-09-14 2:29 ` David Gibson
2022-09-13 6:39 ` [PATCH v8 04/14] qapi: net: introduce a way to bypass qemu_opts_parse_noisily() Laurent Vivier
` (11 subsequent siblings)
14 siblings, 1 reply; 31+ messages in thread
From: Laurent Vivier @ 2022-09-13 6:39 UTC (permalink / raw)
To: qemu-devel
Cc: Jason Wang, Paolo Bonzini, Gregory Kurz, Daniel P. Berrangé,
Laurent Vivier, Eric Blake, Markus Armbruster, Thomas Huth,
David Gibson, Dr. David Alan Gilbert
All net_client_parse() callers exit in case of error.
Move exit(1) to net_client_parse() and remove error checking from
the callers.
Suggested-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Laurent Vivier <lvivier@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
---
include/net/net.h | 2 +-
net/net.c | 6 ++----
softmmu/vl.c | 12 +++---------
3 files changed, 6 insertions(+), 14 deletions(-)
diff --git a/include/net/net.h b/include/net/net.h
index c1c34a58f849..55023e7e9fa9 100644
--- a/include/net/net.h
+++ b/include/net/net.h
@@ -220,7 +220,7 @@ extern NICInfo nd_table[MAX_NICS];
extern const char *host_net_devices[];
/* from net.c */
-int net_client_parse(QemuOptsList *opts_list, const char *str);
+void net_client_parse(QemuOptsList *opts_list, const char *str);
void show_netdevs(void);
void net_init_clients(void);
void net_check_clients(void);
diff --git a/net/net.c b/net/net.c
index 15958f881776..f056e8aebfb2 100644
--- a/net/net.c
+++ b/net/net.c
@@ -1579,13 +1579,11 @@ void net_init_clients(void)
&error_fatal);
}
-int net_client_parse(QemuOptsList *opts_list, const char *optarg)
+void net_client_parse(QemuOptsList *opts_list, const char *optarg)
{
if (!qemu_opts_parse_noisily(opts_list, optarg, true)) {
- return -1;
+ exit(1);
}
-
- return 0;
}
/* From FreeBSD */
diff --git a/softmmu/vl.c b/softmmu/vl.c
index 1fe8b5c5a120..55d163475e9e 100644
--- a/softmmu/vl.c
+++ b/softmmu/vl.c
@@ -2809,21 +2809,15 @@ void qemu_init(int argc, char **argv, char **envp)
break;
case QEMU_OPTION_netdev:
default_net = 0;
- if (net_client_parse(qemu_find_opts("netdev"), optarg) == -1) {
- exit(1);
- }
+ net_client_parse(qemu_find_opts("netdev"), optarg);
break;
case QEMU_OPTION_nic:
default_net = 0;
- if (net_client_parse(qemu_find_opts("nic"), optarg) == -1) {
- exit(1);
- }
+ net_client_parse(qemu_find_opts("nic"), optarg);
break;
case QEMU_OPTION_net:
default_net = 0;
- if (net_client_parse(qemu_find_opts("net"), optarg) == -1) {
- exit(1);
- }
+ net_client_parse(qemu_find_opts("net"), optarg);
break;
#ifdef CONFIG_LIBISCSI
case QEMU_OPTION_iscsi:
--
2.37.3
^ permalink raw reply related [flat|nested] 31+ messages in thread
* [PATCH v8 04/14] qapi: net: introduce a way to bypass qemu_opts_parse_noisily()
2022-09-13 6:39 [PATCH v8 00/14] qapi: net: add unix socket type support to netdev backend Laurent Vivier
` (2 preceding siblings ...)
2022-09-13 6:39 ` [PATCH v8 03/14] net: simplify net_client_parse() error management Laurent Vivier
@ 2022-09-13 6:39 ` Laurent Vivier
2022-09-13 6:39 ` [PATCH v8 05/14] qapi: net: add stream and dgram netdevs Laurent Vivier
` (10 subsequent siblings)
14 siblings, 0 replies; 31+ messages in thread
From: Laurent Vivier @ 2022-09-13 6:39 UTC (permalink / raw)
To: qemu-devel
Cc: Jason Wang, Paolo Bonzini, Gregory Kurz, Daniel P. Berrangé,
Laurent Vivier, Eric Blake, Markus Armbruster, Thomas Huth,
David Gibson, Dr. David Alan Gilbert
As qemu_opts_parse_noisily() flattens the QAPI structures ("type" field
of Netdev structure can collides with "type" field of SocketAddress),
we introduce a way to bypass qemu_opts_parse_noisily() and use directly
visit_type_Netdev() to parse the backend parameters.
More details from Markus:
qemu_init() passes the argument of -netdev, -nic, and -net to
net_client_parse().
net_client_parse() parses with qemu_opts_parse_noisily(), passing
QemuOptsList qemu_netdev_opts for -netdev, qemu_nic_opts for -nic, and
qemu_net_opts for -net. Their desc[] are all empty, which means any
keys are accepted. The result of the parse (a QemuOpts) is stored in
the QemuOptsList.
Note that QemuOpts is flat by design. In some places, we layer non-flat
on top using dotted keys convention, but not here.
net_init_clients() iterates over the stored QemuOpts, and passes them to
net_init_netdev(), net_param_nic(), or net_init_client(), respectively.
These functions pass the QemuOpts to net_client_init(). They also do
other things with the QemuOpts, which we can ignore here.
net_client_init() uses the opts visitor to convert the (flat) QemOpts to
a (non-flat) QAPI object Netdev. Netdev is also the argument of QMP
command netdev_add.
The opts visitor was an early attempt to support QAPI in
(QemuOpts-based) CLI. It restricts QAPI types to a certain shape; see
commit eb7ee2cbeb "qapi: introduce OptsVisitor".
A more modern way to support QAPI is qobject_input_visitor_new_str().
It uses keyval_parse() instead of QemuOpts for KEY=VALUE,... syntax, and
it also supports JSON syntax. The former isn't quite as expressive as
JSON, but it's a lot closer than QemuOpts + opts visitor.
This commit paves the way to use of the modern way instead.
Signed-off-by: Laurent Vivier <lvivier@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
---
include/net/net.h | 2 ++
net/net.c | 57 +++++++++++++++++++++++++++++++++++++++++++++++
softmmu/vl.c | 6 ++++-
3 files changed, 64 insertions(+), 1 deletion(-)
diff --git a/include/net/net.h b/include/net/net.h
index 55023e7e9fa9..025dbf1e143b 100644
--- a/include/net/net.h
+++ b/include/net/net.h
@@ -220,6 +220,8 @@ extern NICInfo nd_table[MAX_NICS];
extern const char *host_net_devices[];
/* from net.c */
+bool netdev_is_modern(const char *optarg);
+void netdev_parse_modern(const char *optarg);
void net_client_parse(QemuOptsList *opts_list, const char *str);
void show_netdevs(void);
void net_init_clients(void);
diff --git a/net/net.c b/net/net.c
index f056e8aebfb2..ffe3e5a2cf1d 100644
--- a/net/net.c
+++ b/net/net.c
@@ -54,6 +54,7 @@
#include "net/colo-compare.h"
#include "net/filter.h"
#include "qapi/string-output-visitor.h"
+#include "qapi/qobject-input-visitor.h"
/* Net bridge is currently not supported for W32. */
#if !defined(_WIN32)
@@ -63,6 +64,16 @@
static VMChangeStateEntry *net_change_state_entry;
static QTAILQ_HEAD(, NetClientState) net_clients;
+typedef struct NetdevQueueEntry {
+ Netdev *nd;
+ Location loc;
+ QSIMPLEQ_ENTRY(NetdevQueueEntry) entry;
+} NetdevQueueEntry;
+
+typedef QSIMPLEQ_HEAD(, NetdevQueueEntry) NetdevQueue;
+
+static NetdevQueue nd_queue = QSIMPLEQ_HEAD_INITIALIZER(nd_queue);
+
/***********************************************************/
/* network device redirectors */
@@ -1562,6 +1573,20 @@ out:
return ret;
}
+static void netdev_init_modern(void)
+{
+ while (!QSIMPLEQ_EMPTY(&nd_queue)) {
+ NetdevQueueEntry *nd = QSIMPLEQ_FIRST(&nd_queue);
+
+ QSIMPLEQ_REMOVE_HEAD(&nd_queue, entry);
+ loc_push_restore(&nd->loc);
+ net_client_init1(nd->nd, true, &error_fatal);
+ loc_pop(&nd->loc);
+ qapi_free_Netdev(nd->nd);
+ g_free(nd);
+ }
+}
+
void net_init_clients(void)
{
net_change_state_entry =
@@ -1569,6 +1594,8 @@ void net_init_clients(void)
QTAILQ_INIT(&net_clients);
+ netdev_init_modern();
+
qemu_opts_foreach(qemu_find_opts("netdev"), net_init_netdev, NULL,
&error_fatal);
@@ -1579,6 +1606,36 @@ void net_init_clients(void)
&error_fatal);
}
+/*
+ * Does this -netdev argument use modern rather than traditional syntax?
+ * Modern syntax is to be parsed with netdev_parse_modern().
+ * Traditional syntax is to be parsed with net_client_parse().
+ */
+bool netdev_is_modern(const char *optarg)
+{
+ return false;
+}
+
+/*
+ * netdev_parse_modern() uses modern, more expressive syntax than
+ * net_client_parse(), but supports only the -netdev option.
+ * netdev_parse_modern() appends to @nd_queue, whereas net_client_parse()
+ * appends to @qemu_netdev_opts.
+ */
+void netdev_parse_modern(const char *optarg)
+{
+ Visitor *v;
+ NetdevQueueEntry *nd;
+
+ v = qobject_input_visitor_new_str(optarg, "type", &error_fatal);
+ nd = g_new(NetdevQueueEntry, 1);
+ visit_type_Netdev(v, NULL, &nd->nd, &error_fatal);
+ visit_free(v);
+ loc_save(&nd->loc);
+
+ QSIMPLEQ_INSERT_TAIL(&nd_queue, nd, entry);
+}
+
void net_client_parse(QemuOptsList *opts_list, const char *optarg)
{
if (!qemu_opts_parse_noisily(opts_list, optarg, true)) {
diff --git a/softmmu/vl.c b/softmmu/vl.c
index 55d163475e9e..ade71aedf13d 100644
--- a/softmmu/vl.c
+++ b/softmmu/vl.c
@@ -2809,7 +2809,11 @@ void qemu_init(int argc, char **argv, char **envp)
break;
case QEMU_OPTION_netdev:
default_net = 0;
- net_client_parse(qemu_find_opts("netdev"), optarg);
+ if (netdev_is_modern(optarg)) {
+ netdev_parse_modern(optarg);
+ } else {
+ net_client_parse(qemu_find_opts("netdev"), optarg);
+ }
break;
case QEMU_OPTION_nic:
default_net = 0;
--
2.37.3
^ permalink raw reply related [flat|nested] 31+ messages in thread
* [PATCH v8 05/14] qapi: net: add stream and dgram netdevs
2022-09-13 6:39 [PATCH v8 00/14] qapi: net: add unix socket type support to netdev backend Laurent Vivier
` (3 preceding siblings ...)
2022-09-13 6:39 ` [PATCH v8 04/14] qapi: net: introduce a way to bypass qemu_opts_parse_noisily() Laurent Vivier
@ 2022-09-13 6:39 ` Laurent Vivier
2022-09-14 5:03 ` David Gibson
2022-09-13 6:39 ` [PATCH v8 06/14] net: stream: Don't ignore EINVAL on netdev socket connection Laurent Vivier
` (9 subsequent siblings)
14 siblings, 1 reply; 31+ messages in thread
From: Laurent Vivier @ 2022-09-13 6:39 UTC (permalink / raw)
To: qemu-devel
Cc: Jason Wang, Paolo Bonzini, Gregory Kurz, Daniel P. Berrangé,
Laurent Vivier, Eric Blake, Markus Armbruster, Thomas Huth,
David Gibson, Dr. David Alan Gilbert, Stefano Brivio
Copied from socket netdev file and modified to use SocketAddress
to be able to introduce new features like unix socket.
"udp" and "mcast" are squashed into dgram netdev, multicast is detected
according to the IP address type.
"listen" and "connect" modes are managed by stream netdev. An optional
parameter "server" defines the mode (server by default)
The two new types need to be parsed the modern way with -netdev, because
with the traditional way, the "type" field of netdev structure collides with
the "type" field of SocketAddress and prevents the correct evaluation of the
command line option. Moreover the traditional way doesn't allow to use
the same type (SocketAddress) several times with the -netdev option
(needed to specify "local" and "remote" addresses).
The previous commit paved the way for parsing the modern way, but
omitted one detail: how to pick modern vs. traditional, in
netdev_is_modern().
We want to pick based on the value of parameter "type". But how to
extract it from the option argument?
Parsing the option argument, either the modern or the traditional way,
extracts it for us, but only if parsing succeeds.
If parsing fails, there is no good option. No matter which parser we
pick, it'll be the wrong one for some arguments, and the error
reporting will be confusing.
Fortunately, the traditional parser accepts *anything* when called in
a certain way. This maximizes our chance to extract the value of
"type", and in turn minimizes the risk of confusing error reporting.
Signed-off-by: Laurent Vivier <lvivier@redhat.com>
Reviewed-by: Stefano Brivio <sbrivio@redhat.com>
---
hmp-commands.hx | 2 +-
net/clients.h | 6 +
net/dgram.c | 631 ++++++++++++++++++++++++++++++++++++++++++++++++
net/hub.c | 2 +
net/meson.build | 2 +
net/net.c | 30 ++-
net/stream.c | 423 ++++++++++++++++++++++++++++++++
qapi/net.json | 63 ++++-
qemu-options.hx | 12 +
9 files changed, 1167 insertions(+), 4 deletions(-)
create mode 100644 net/dgram.c
create mode 100644 net/stream.c
diff --git a/hmp-commands.hx b/hmp-commands.hx
index 182e639d1498..83e8d45a2a8b 100644
--- a/hmp-commands.hx
+++ b/hmp-commands.hx
@@ -1276,7 +1276,7 @@ ERST
{
.name = "netdev_add",
.args_type = "netdev:O",
- .params = "[user|tap|socket|vde|bridge|hubport|netmap|vhost-user"
+ .params = "[user|tap|socket|stream|dgram|vde|bridge|hubport|netmap|vhost-user"
#ifdef CONFIG_VMNET
"|vmnet-host|vmnet-shared|vmnet-bridged"
#endif
diff --git a/net/clients.h b/net/clients.h
index c9157789f2ce..ed8bdfff1e7c 100644
--- a/net/clients.h
+++ b/net/clients.h
@@ -40,6 +40,12 @@ int net_init_hubport(const Netdev *netdev, const char *name,
int net_init_socket(const Netdev *netdev, const char *name,
NetClientState *peer, Error **errp);
+int net_init_stream(const Netdev *netdev, const char *name,
+ NetClientState *peer, Error **errp);
+
+int net_init_dgram(const Netdev *netdev, const char *name,
+ NetClientState *peer, Error **errp);
+
int net_init_tap(const Netdev *netdev, const char *name,
NetClientState *peer, Error **errp);
diff --git a/net/dgram.c b/net/dgram.c
new file mode 100644
index 000000000000..dbe65102d174
--- /dev/null
+++ b/net/dgram.c
@@ -0,0 +1,631 @@
+/*
+ * QEMU System Emulator
+ *
+ * Copyright (c) 2003-2008 Fabrice Bellard
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "qemu/osdep.h"
+
+#include "net/net.h"
+#include "clients.h"
+#include "monitor/monitor.h"
+#include "qapi/error.h"
+#include "qemu/error-report.h"
+#include "qemu/option.h"
+#include "qemu/sockets.h"
+#include "qemu/iov.h"
+#include "qemu/main-loop.h"
+#include "qemu/cutils.h"
+
+typedef struct NetDgramState {
+ NetClientState nc;
+ int listen_fd;
+ int fd;
+ SocketReadState rs;
+ /* contains inet host and port destination iff connectionless (SOCK_DGRAM) */
+ struct sockaddr_in dgram_dst;
+ IOHandler *send_fn; /* differs between SOCK_STREAM/SOCK_DGRAM */
+ bool read_poll; /* waiting to receive data? */
+ bool write_poll; /* waiting to transmit data? */
+} NetDgramState;
+
+static void net_dgram_accept(void *opaque);
+static void net_dgram_writable(void *opaque);
+
+static void net_dgram_update_fd_handler(NetDgramState *s)
+{
+ qemu_set_fd_handler(s->fd,
+ s->read_poll ? s->send_fn : NULL,
+ s->write_poll ? net_dgram_writable : NULL,
+ s);
+}
+
+static void net_dgram_read_poll(NetDgramState *s, bool enable)
+{
+ s->read_poll = enable;
+ net_dgram_update_fd_handler(s);
+}
+
+static void net_dgram_write_poll(NetDgramState *s, bool enable)
+{
+ s->write_poll = enable;
+ net_dgram_update_fd_handler(s);
+}
+
+static void net_dgram_writable(void *opaque)
+{
+ NetDgramState *s = opaque;
+
+ net_dgram_write_poll(s, false);
+
+ qemu_flush_queued_packets(&s->nc);
+}
+
+static ssize_t net_dgram_receive_dgram(NetClientState *nc,
+ const uint8_t *buf, size_t size)
+{
+ NetDgramState *s = DO_UPCAST(NetDgramState, nc, nc);
+ ssize_t ret;
+
+ do {
+ if (s->dgram_dst.sin_family != AF_UNIX) {
+ ret = sendto(s->fd, buf, size, 0,
+ (struct sockaddr *)&s->dgram_dst,
+ sizeof(s->dgram_dst));
+ } else {
+ ret = send(s->fd, buf, size, 0);
+ }
+ } while (ret == -1 && errno == EINTR);
+
+ if (ret == -1 && errno == EAGAIN) {
+ net_dgram_write_poll(s, true);
+ return 0;
+ }
+ return ret;
+}
+
+static void net_dgram_send_completed(NetClientState *nc, ssize_t len)
+{
+ NetDgramState *s = DO_UPCAST(NetDgramState, nc, nc);
+
+ if (!s->read_poll) {
+ net_dgram_read_poll(s, true);
+ }
+}
+
+static void net_dgram_rs_finalize(SocketReadState *rs)
+{
+ NetDgramState *s = container_of(rs, NetDgramState, rs);
+
+ if (qemu_send_packet_async(&s->nc, rs->buf,
+ rs->packet_len,
+ net_dgram_send_completed) == 0) {
+ net_dgram_read_poll(s, false);
+ }
+}
+
+static void net_dgram_send(void *opaque)
+{
+ NetDgramState *s = opaque;
+ int size;
+ int ret;
+ uint8_t buf1[NET_BUFSIZE];
+ const uint8_t *buf;
+
+ size = recv(s->fd, buf1, sizeof(buf1), 0);
+ if (size < 0) {
+ if (errno != EWOULDBLOCK) {
+ goto eoc;
+ }
+ } else if (size == 0) {
+ /* end of connection */
+ eoc:
+ net_dgram_read_poll(s, false);
+ net_dgram_write_poll(s, false);
+ if (s->listen_fd != -1) {
+ qemu_set_fd_handler(s->listen_fd, net_dgram_accept, NULL, s);
+ }
+ closesocket(s->fd);
+
+ s->fd = -1;
+ net_socket_rs_init(&s->rs, net_dgram_rs_finalize, false);
+ s->nc.link_down = true;
+ memset(s->nc.info_str, 0, sizeof(s->nc.info_str));
+
+ return;
+ }
+ buf = buf1;
+
+ ret = net_fill_rstate(&s->rs, buf, size);
+
+ if (ret == -1) {
+ goto eoc;
+ }
+}
+
+static void net_dgram_send_dgram(void *opaque)
+{
+ NetDgramState *s = opaque;
+ int size;
+
+ size = recv(s->fd, s->rs.buf, sizeof(s->rs.buf), 0);
+ if (size < 0) {
+ return;
+ }
+ if (size == 0) {
+ /* end of connection */
+ net_dgram_read_poll(s, false);
+ net_dgram_write_poll(s, false);
+ return;
+ }
+ if (qemu_send_packet_async(&s->nc, s->rs.buf, size,
+ net_dgram_send_completed) == 0) {
+ net_dgram_read_poll(s, false);
+ }
+}
+
+static int net_dgram_mcast_create(struct sockaddr_in *mcastaddr,
+ struct in_addr *localaddr,
+ Error **errp)
+{
+ struct ip_mreq imr;
+ int fd;
+ int val, ret;
+#ifdef __OpenBSD__
+ unsigned char loop;
+#else
+ int loop;
+#endif
+
+ if (!IN_MULTICAST(ntohl(mcastaddr->sin_addr.s_addr))) {
+ error_setg(errp, "specified mcastaddr %s (0x%08x) "
+ "does not contain a multicast address",
+ inet_ntoa(mcastaddr->sin_addr),
+ (int)ntohl(mcastaddr->sin_addr.s_addr));
+ return -1;
+ }
+
+ fd = qemu_socket(PF_INET, SOCK_DGRAM, 0);
+ if (fd < 0) {
+ error_setg_errno(errp, errno, "can't create datagram socket");
+ return -1;
+ }
+
+ /*
+ * Allow multiple sockets to bind the same multicast ip and port by setting
+ * SO_REUSEADDR. This is the only situation where SO_REUSEADDR should be set
+ * on windows. Use socket_set_fast_reuse otherwise as it sets SO_REUSEADDR
+ * only on posix systems.
+ */
+ val = 1;
+ ret = setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &val, sizeof(val));
+ if (ret < 0) {
+ error_setg_errno(errp, errno, "can't set socket option SO_REUSEADDR");
+ goto fail;
+ }
+
+ ret = bind(fd, (struct sockaddr *)mcastaddr, sizeof(*mcastaddr));
+ if (ret < 0) {
+ error_setg_errno(errp, errno, "can't bind ip=%s to socket",
+ inet_ntoa(mcastaddr->sin_addr));
+ goto fail;
+ }
+
+ /* Add host to multicast group */
+ imr.imr_multiaddr = mcastaddr->sin_addr;
+ if (localaddr) {
+ imr.imr_interface = *localaddr;
+ } else {
+ imr.imr_interface.s_addr = htonl(INADDR_ANY);
+ }
+
+ ret = setsockopt(fd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
+ &imr, sizeof(struct ip_mreq));
+ if (ret < 0) {
+ error_setg_errno(errp, errno,
+ "can't add socket to multicast group %s",
+ inet_ntoa(imr.imr_multiaddr));
+ goto fail;
+ }
+
+ /* Force mcast msgs to loopback (eg. several QEMUs in same host */
+ loop = 1;
+ ret = setsockopt(fd, IPPROTO_IP, IP_MULTICAST_LOOP,
+ &loop, sizeof(loop));
+ if (ret < 0) {
+ error_setg_errno(errp, errno,
+ "can't force multicast message to loopback");
+ goto fail;
+ }
+
+ /* If a bind address is given, only send packets from that address */
+ if (localaddr != NULL) {
+ ret = setsockopt(fd, IPPROTO_IP, IP_MULTICAST_IF,
+ localaddr, sizeof(*localaddr));
+ if (ret < 0) {
+ error_setg_errno(errp, errno,
+ "can't set the default network send interface");
+ goto fail;
+ }
+ }
+
+ qemu_socket_set_nonblock(fd);
+ return fd;
+fail:
+ if (fd >= 0) {
+ closesocket(fd);
+ }
+ return -1;
+}
+
+static void net_dgram_cleanup(NetClientState *nc)
+{
+ NetDgramState *s = DO_UPCAST(NetDgramState, nc, nc);
+ if (s->fd != -1) {
+ net_dgram_read_poll(s, false);
+ net_dgram_write_poll(s, false);
+ close(s->fd);
+ s->fd = -1;
+ }
+ if (s->listen_fd != -1) {
+ qemu_set_fd_handler(s->listen_fd, NULL, NULL, NULL);
+ closesocket(s->listen_fd);
+ s->listen_fd = -1;
+ }
+}
+
+static NetClientInfo net_dgram_socket_info = {
+ .type = NET_CLIENT_DRIVER_DGRAM,
+ .size = sizeof(NetDgramState),
+ .receive = net_dgram_receive_dgram,
+ .cleanup = net_dgram_cleanup,
+};
+
+static NetDgramState *net_dgram_fd_init_dgram(NetClientState *peer,
+ const char *model,
+ const char *name,
+ int fd, int is_fd,
+ SocketAddress *mcast,
+ Error **errp)
+{
+ struct sockaddr_in saddr;
+ int newfd;
+ NetClientState *nc;
+ NetDgramState *s;
+ SocketAddress *sa;
+ SocketAddressType sa_type;
+
+ sa = socket_local_address(fd, errp);
+ if (!sa) {
+ return NULL;
+ }
+ sa_type = sa->type;
+ qapi_free_SocketAddress(sa);
+
+ /*
+ * fd passed: multicast: "learn" dgram_dst address from bound address and
+ * save it. Because this may be "shared" socket from a "master" process,
+ * datagrams would be recv() by ONLY ONE process: we must "clone" this
+ * dgram socket --jjo
+ */
+
+ if (is_fd && mcast != NULL) {
+ if (convert_host_port(&saddr, mcast->u.inet.host,
+ mcast->u.inet.port, errp) < 0) {
+ goto err;
+ }
+ /* must be bound */
+ if (saddr.sin_addr.s_addr == 0) {
+ error_setg(errp, "can't setup multicast destination address");
+ goto err;
+ }
+ /* clone dgram socket */
+ newfd = net_dgram_mcast_create(&saddr, NULL, errp);
+ if (newfd < 0) {
+ goto err;
+ }
+ /* clone newfd to fd, close newfd */
+ dup2(newfd, fd);
+ close(newfd);
+
+ }
+
+ nc = qemu_new_net_client(&net_dgram_socket_info, peer, model, name);
+
+ s = DO_UPCAST(NetDgramState, nc, nc);
+
+ s->fd = fd;
+ s->listen_fd = -1;
+ s->send_fn = net_dgram_send_dgram;
+ net_socket_rs_init(&s->rs, net_dgram_rs_finalize, false);
+ net_dgram_read_poll(s, true);
+
+ /* mcast: save bound address as dst */
+ if (is_fd && mcast != NULL) {
+ s->dgram_dst = saddr;
+ snprintf(nc->info_str, sizeof(nc->info_str),
+ "fd=%d (cloned mcast=%s:%d)",
+ fd, inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
+ } else {
+ if (sa_type == SOCKET_ADDRESS_TYPE_UNIX) {
+ s->dgram_dst.sin_family = AF_UNIX;
+ }
+
+ snprintf(nc->info_str, sizeof(nc->info_str), "fd=%d %s", fd,
+ SocketAddressType_str(sa_type));
+ }
+
+ return s;
+
+err:
+ closesocket(fd);
+ return NULL;
+}
+
+static void net_dgram_connect(void *opaque)
+{
+ NetDgramState *s = opaque;
+ s->send_fn = net_dgram_send;
+ net_dgram_read_poll(s, true);
+}
+
+static void net_dgram_accept(void *opaque)
+{
+ NetDgramState *s = opaque;
+ struct sockaddr_in saddr;
+ socklen_t len;
+ int fd;
+
+ for (;;) {
+ len = sizeof(saddr);
+ fd = qemu_accept(s->listen_fd, (struct sockaddr *)&saddr, &len);
+ if (fd < 0 && errno != EINTR) {
+ return;
+ } else if (fd >= 0) {
+ qemu_set_fd_handler(s->listen_fd, NULL, NULL, NULL);
+ break;
+ }
+ }
+
+ s->fd = fd;
+ s->nc.link_down = false;
+ net_dgram_connect(s);
+ snprintf(s->nc.info_str, sizeof(s->nc.info_str), "connection from %s:%d",
+ inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
+}
+
+static int net_dgram_mcast_init(NetClientState *peer,
+ const char *model,
+ const char *name,
+ SocketAddress *remote,
+ SocketAddress *local,
+ Error **errp)
+{
+ NetDgramState *s;
+ int fd, ret;
+ struct sockaddr_in saddr;
+
+ if (remote->type != SOCKET_ADDRESS_TYPE_INET) {
+ error_setg(errp, "multicast only support inet type");
+ return -1;
+ }
+
+ if (convert_host_port(&saddr, remote->u.inet.host, remote->u.inet.port,
+ errp) < 0) {
+ return -1;
+ }
+
+ if (!local) {
+ fd = net_dgram_mcast_create(&saddr, NULL, errp);
+ if (fd < 0) {
+ return -1;
+ }
+ } else {
+ switch (local->type) {
+ case SOCKET_ADDRESS_TYPE_INET: {
+ struct in_addr localaddr;
+
+ if (inet_aton(local->u.inet.host, &localaddr) == 0) {
+ error_setg(errp, "localaddr '%s' is not a valid IPv4 address",
+ local->u.inet.host);
+ return -1;
+ }
+
+ fd = net_dgram_mcast_create(&saddr, &localaddr, errp);
+ if (fd < 0) {
+ return -1;
+ }
+ break;
+ }
+ case SOCKET_ADDRESS_TYPE_FD:
+ fd = monitor_fd_param(monitor_cur(), local->u.fd.str, errp);
+ if (fd == -1) {
+ return -1;
+ }
+ ret = qemu_socket_try_set_nonblock(fd);
+ if (ret < 0) {
+ error_setg_errno(errp, -ret, "%s: Can't use file descriptor %d",
+ name, fd);
+ return -1;
+ }
+ break;
+ default:
+ error_setg(errp, "only support inet or fd type for local");
+ return -1;
+ }
+ }
+
+ s = net_dgram_fd_init_dgram(peer, model, name, fd,
+ local->type == SOCKET_ADDRESS_TYPE_FD,
+ remote, errp);
+ if (!s) {
+ return -1;
+ }
+
+ s->dgram_dst = saddr;
+
+ snprintf(s->nc.info_str, sizeof(s->nc.info_str), "mcast=%s:%d",
+ inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
+ return 0;
+
+}
+
+static int net_dgram_udp_init(NetClientState *peer,
+ const char *model,
+ const char *name,
+ SocketAddress *remote,
+ SocketAddress *local,
+ Error **errp)
+{
+ NetDgramState *s;
+ int fd, ret;
+ struct sockaddr_in raddr_in;
+ gchar *info_str;
+
+ if (remote) {
+ if (local->type == SOCKET_ADDRESS_TYPE_FD) {
+ error_setg(errp, "don't set remote with local.fd");
+ return -1;
+ }
+ if (remote->type != local->type) {
+ error_setg(errp, "remote and local types must be the same");
+ return -1;
+ }
+ } else {
+ if (local->type != SOCKET_ADDRESS_TYPE_FD) {
+ error_setg(errp, "type=inet requires remote parameter");
+ return -1;
+ }
+ }
+
+ switch (local->type) {
+ case SOCKET_ADDRESS_TYPE_INET: {
+ struct sockaddr_in laddr_in;
+
+ if (convert_host_port(&laddr_in, local->u.inet.host, local->u.inet.port,
+ errp) < 0) {
+ return -1;
+ }
+
+ if (convert_host_port(&raddr_in, remote->u.inet.host,
+ remote->u.inet.port, errp) < 0) {
+ return -1;
+ }
+
+ fd = qemu_socket(PF_INET, SOCK_DGRAM, 0);
+ if (fd < 0) {
+ error_setg_errno(errp, errno, "can't create datagram socket");
+ return -1;
+ }
+
+ ret = socket_set_fast_reuse(fd);
+ if (ret < 0) {
+ error_setg_errno(errp, errno,
+ "can't set socket option SO_REUSEADDR");
+ closesocket(fd);
+ return -1;
+ }
+ ret = bind(fd, (struct sockaddr *)&laddr_in, sizeof(laddr_in));
+ if (ret < 0) {
+ error_setg_errno(errp, errno, "can't bind ip=%s to socket",
+ inet_ntoa(laddr_in.sin_addr));
+ closesocket(fd);
+ return -1;
+ }
+ qemu_socket_set_nonblock(fd);
+
+ info_str = g_strdup_printf("udp=%s:%d/%s:%d",
+ inet_ntoa(laddr_in.sin_addr), ntohs(laddr_in.sin_port),
+ inet_ntoa(raddr_in.sin_addr), ntohs(raddr_in.sin_port));
+
+ break;
+ }
+ case SOCKET_ADDRESS_TYPE_FD:
+ fd = monitor_fd_param(monitor_cur(), local->u.fd.str, errp);
+ if (fd == -1) {
+ return -1;
+ }
+ ret = qemu_socket_try_set_nonblock(fd);
+ if (ret < 0) {
+ error_setg_errno(errp, -ret, "%s: Can't use file descriptor %d",
+ name, fd);
+ return -1;
+ }
+ break;
+ default:
+ error_setg(errp, "only support inet or fd type for local");
+ return -1;
+ }
+
+ s = net_dgram_fd_init_dgram(peer, model, name, fd, 0, NULL, errp);
+ if (!s) {
+ return -1;
+ }
+
+ if (remote) {
+ s->dgram_dst = raddr_in;
+
+ pstrcpy(s->nc.info_str, sizeof(s->nc.info_str), info_str);
+ g_free(info_str);
+ }
+ return 0;
+}
+
+static int net_dgram_init(NetClientState *peer,
+ const char *model,
+ const char *name,
+ SocketAddress *remote,
+ SocketAddress *local,
+ Error **errp)
+{
+ /* detect multicast address */
+ if (remote && remote->type == SOCKET_ADDRESS_TYPE_INET) {
+ struct sockaddr_in mcastaddr;
+
+ if (convert_host_port(&mcastaddr, remote->u.inet.host,
+ remote->u.inet.port, errp) < 0) {
+ return -1;
+ }
+
+ if (IN_MULTICAST(ntohl(mcastaddr.sin_addr.s_addr))) {
+ return net_dgram_mcast_init(peer, model, name, remote, local,
+ errp);
+ }
+ }
+ /* unicast address */
+ if (!local) {
+ error_setg(errp, "dgram requires local= parameter");
+ return -1;
+ }
+ return net_dgram_udp_init(peer, model, name, remote, local, errp);
+}
+
+int net_init_dgram(const Netdev *netdev, const char *name,
+ NetClientState *peer, Error **errp)
+{
+ const NetdevDgramOptions *sock;
+
+ assert(netdev->type == NET_CLIENT_DRIVER_DGRAM);
+ sock = &netdev->u.dgram;
+
+ return net_dgram_init(peer, "dgram", name, sock->remote, sock->local,
+ errp);
+}
diff --git a/net/hub.c b/net/hub.c
index 1375738bf121..67ca53485638 100644
--- a/net/hub.c
+++ b/net/hub.c
@@ -313,6 +313,8 @@ void net_hub_check_clients(void)
case NET_CLIENT_DRIVER_USER:
case NET_CLIENT_DRIVER_TAP:
case NET_CLIENT_DRIVER_SOCKET:
+ case NET_CLIENT_DRIVER_STREAM:
+ case NET_CLIENT_DRIVER_DGRAM:
case NET_CLIENT_DRIVER_VDE:
case NET_CLIENT_DRIVER_VHOST_USER:
has_host_dev = 1;
diff --git a/net/meson.build b/net/meson.build
index d1be76daf361..6cd1e3dab3a6 100644
--- a/net/meson.build
+++ b/net/meson.build
@@ -13,6 +13,8 @@ softmmu_ss.add(files(
'net.c',
'queue.c',
'socket.c',
+ 'stream.c',
+ 'dgram.c',
'util.c',
))
diff --git a/net/net.c b/net/net.c
index ffe3e5a2cf1d..79e54e6228e8 100644
--- a/net/net.c
+++ b/net/net.c
@@ -48,6 +48,7 @@
#include "qemu/qemu-print.h"
#include "qemu/main-loop.h"
#include "qemu/option.h"
+#include "qemu/keyval.h"
#include "qapi/error.h"
#include "qapi/opts-visitor.h"
#include "sysemu/runstate.h"
@@ -1014,6 +1015,8 @@ static int (* const net_client_init_fun[NET_CLIENT_DRIVER__MAX])(
#endif
[NET_CLIENT_DRIVER_TAP] = net_init_tap,
[NET_CLIENT_DRIVER_SOCKET] = net_init_socket,
+ [NET_CLIENT_DRIVER_STREAM] = net_init_stream,
+ [NET_CLIENT_DRIVER_DGRAM] = net_init_dgram,
#ifdef CONFIG_VDE
[NET_CLIENT_DRIVER_VDE] = net_init_vde,
#endif
@@ -1101,6 +1104,8 @@ void show_netdevs(void)
int idx;
const char *available_netdevs[] = {
"socket",
+ "stream",
+ "dgram",
"hubport",
"tap",
#ifdef CONFIG_SLIRP
@@ -1613,7 +1618,30 @@ void net_init_clients(void)
*/
bool netdev_is_modern(const char *optarg)
{
- return false;
+ QemuOpts *opts;
+ bool is_modern;
+ const char *type;
+ static QemuOptsList dummy_opts = {
+ .name = "netdev",
+ .implied_opt_name = "type",
+ .head = QTAILQ_HEAD_INITIALIZER(dummy_opts.head),
+ .desc = { { } },
+ };
+
+ if (optarg[0] == '{') {
+ /* This is JSON, which means it's modern syntax */
+ return true;
+ }
+
+ opts = qemu_opts_create(&dummy_opts, NULL, false, &error_abort);
+ qemu_opts_do_parse(opts, optarg, dummy_opts.implied_opt_name,
+ &error_abort);
+ type = qemu_opt_get(opts, "type");
+ is_modern = !g_strcmp0(type, "stream") || !g_strcmp0(type, "dgram");
+
+ qemu_opts_reset(&dummy_opts);
+
+ return is_modern;
}
/*
diff --git a/net/stream.c b/net/stream.c
new file mode 100644
index 000000000000..0851e90becca
--- /dev/null
+++ b/net/stream.c
@@ -0,0 +1,423 @@
+/*
+ * QEMU System Emulator
+ *
+ * Copyright (c) 2003-2008 Fabrice Bellard
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "qemu/osdep.h"
+
+#include "net/net.h"
+#include "clients.h"
+#include "monitor/monitor.h"
+#include "qapi/error.h"
+#include "qemu/error-report.h"
+#include "qemu/option.h"
+#include "qemu/sockets.h"
+#include "qemu/iov.h"
+#include "qemu/main-loop.h"
+#include "qemu/cutils.h"
+
+typedef struct NetStreamState {
+ NetClientState nc;
+ int listen_fd;
+ int fd;
+ SocketReadState rs;
+ unsigned int send_index; /* number of bytes sent*/
+ IOHandler *send_fn;
+ bool read_poll; /* waiting to receive data? */
+ bool write_poll; /* waiting to transmit data? */
+} NetStreamState;
+
+static void net_stream_accept(void *opaque);
+static void net_stream_writable(void *opaque);
+
+static void net_stream_update_fd_handler(NetStreamState *s)
+{
+ qemu_set_fd_handler(s->fd,
+ s->read_poll ? s->send_fn : NULL,
+ s->write_poll ? net_stream_writable : NULL,
+ s);
+}
+
+static void net_stream_read_poll(NetStreamState *s, bool enable)
+{
+ s->read_poll = enable;
+ net_stream_update_fd_handler(s);
+}
+
+static void net_stream_write_poll(NetStreamState *s, bool enable)
+{
+ s->write_poll = enable;
+ net_stream_update_fd_handler(s);
+}
+
+static void net_stream_writable(void *opaque)
+{
+ NetStreamState *s = opaque;
+
+ net_stream_write_poll(s, false);
+
+ qemu_flush_queued_packets(&s->nc);
+}
+
+static ssize_t net_stream_receive(NetClientState *nc, const uint8_t *buf,
+ size_t size)
+{
+ NetStreamState *s = DO_UPCAST(NetStreamState, nc, nc);
+ uint32_t len = htonl(size);
+ struct iovec iov[] = {
+ {
+ .iov_base = &len,
+ .iov_len = sizeof(len),
+ }, {
+ .iov_base = (void *)buf,
+ .iov_len = size,
+ },
+ };
+ size_t remaining;
+ ssize_t ret;
+
+ remaining = iov_size(iov, 2) - s->send_index;
+ ret = iov_send(s->fd, iov, 2, s->send_index, remaining);
+
+ if (ret == -1 && errno == EAGAIN) {
+ ret = 0; /* handled further down */
+ }
+ if (ret == -1) {
+ s->send_index = 0;
+ return -errno;
+ }
+ if (ret < (ssize_t)remaining) {
+ s->send_index += ret;
+ net_stream_write_poll(s, true);
+ return 0;
+ }
+ s->send_index = 0;
+ return size;
+}
+
+static void net_stream_send_completed(NetClientState *nc, ssize_t len)
+{
+ NetStreamState *s = DO_UPCAST(NetStreamState, nc, nc);
+
+ if (!s->read_poll) {
+ net_stream_read_poll(s, true);
+ }
+}
+
+static void net_stream_rs_finalize(SocketReadState *rs)
+{
+ NetStreamState *s = container_of(rs, NetStreamState, rs);
+
+ if (qemu_send_packet_async(&s->nc, rs->buf,
+ rs->packet_len,
+ net_stream_send_completed) == 0) {
+ net_stream_read_poll(s, false);
+ }
+}
+
+static void net_stream_send(void *opaque)
+{
+ NetStreamState *s = opaque;
+ int size;
+ int ret;
+ uint8_t buf1[NET_BUFSIZE];
+ const uint8_t *buf;
+
+ size = recv(s->fd, buf1, sizeof(buf1), 0);
+ if (size < 0) {
+ if (errno != EWOULDBLOCK) {
+ goto eoc;
+ }
+ } else if (size == 0) {
+ /* end of connection */
+ eoc:
+ net_stream_read_poll(s, false);
+ net_stream_write_poll(s, false);
+ if (s->listen_fd != -1) {
+ qemu_set_fd_handler(s->listen_fd, net_stream_accept, NULL, s);
+ }
+ closesocket(s->fd);
+
+ s->fd = -1;
+ net_socket_rs_init(&s->rs, net_stream_rs_finalize, false);
+ s->nc.link_down = true;
+ memset(s->nc.info_str, 0, sizeof(s->nc.info_str));
+
+ return;
+ }
+ buf = buf1;
+
+ ret = net_fill_rstate(&s->rs, buf, size);
+
+ if (ret == -1) {
+ goto eoc;
+ }
+}
+
+static void net_stream_cleanup(NetClientState *nc)
+{
+ NetStreamState *s = DO_UPCAST(NetStreamState, nc, nc);
+ if (s->fd != -1) {
+ net_stream_read_poll(s, false);
+ net_stream_write_poll(s, false);
+ close(s->fd);
+ s->fd = -1;
+ }
+ if (s->listen_fd != -1) {
+ qemu_set_fd_handler(s->listen_fd, NULL, NULL, NULL);
+ closesocket(s->listen_fd);
+ s->listen_fd = -1;
+ }
+}
+
+static void net_stream_connect(void *opaque)
+{
+ NetStreamState *s = opaque;
+ s->send_fn = net_stream_send;
+ net_stream_read_poll(s, true);
+}
+
+static NetClientInfo net_stream_info = {
+ .type = NET_CLIENT_DRIVER_STREAM,
+ .size = sizeof(NetStreamState),
+ .receive = net_stream_receive,
+ .cleanup = net_stream_cleanup,
+};
+
+static NetStreamState *net_stream_fd_init_stream(NetClientState *peer,
+ const char *model,
+ const char *name,
+ int fd, int is_connected)
+{
+ NetClientState *nc;
+ NetStreamState *s;
+
+ nc = qemu_new_net_client(&net_stream_info, peer, model, name);
+
+ snprintf(nc->info_str, sizeof(nc->info_str), "fd=%d", fd);
+
+ s = DO_UPCAST(NetStreamState, nc, nc);
+
+ s->fd = fd;
+ s->listen_fd = -1;
+ net_socket_rs_init(&s->rs, net_stream_rs_finalize, false);
+
+ /* Disable Nagle algorithm on TCP sockets to reduce latency */
+ socket_set_nodelay(fd);
+
+ if (is_connected) {
+ net_stream_connect(s);
+ } else {
+ qemu_set_fd_handler(s->fd, NULL, net_stream_connect, s);
+ }
+ return s;
+}
+
+static void net_stream_accept(void *opaque)
+{
+ NetStreamState *s = opaque;
+ struct sockaddr_in saddr;
+ socklen_t len;
+ int fd;
+
+ for (;;) {
+ len = sizeof(saddr);
+ fd = qemu_accept(s->listen_fd, (struct sockaddr *)&saddr, &len);
+ if (fd < 0 && errno != EINTR) {
+ return;
+ } else if (fd >= 0) {
+ qemu_set_fd_handler(s->listen_fd, NULL, NULL, NULL);
+ break;
+ }
+ }
+
+ s->fd = fd;
+ s->nc.link_down = false;
+ net_stream_connect(s);
+ snprintf(s->nc.info_str, sizeof(s->nc.info_str),
+ "connection from %s:%d",
+ inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
+}
+
+static int net_stream_server_init(NetClientState *peer,
+ const char *model,
+ const char *name,
+ SocketAddress *addr,
+ Error **errp)
+{
+ NetClientState *nc;
+ NetStreamState *s;
+ int fd, ret;
+
+ switch (addr->type) {
+ case SOCKET_ADDRESS_TYPE_INET: {
+ struct sockaddr_in saddr_in;
+
+ if (convert_host_port(&saddr_in, addr->u.inet.host, addr->u.inet.port,
+ errp) < 0) {
+ return -1;
+ }
+
+ fd = qemu_socket(PF_INET, SOCK_STREAM, 0);
+ if (fd < 0) {
+ error_setg_errno(errp, errno, "can't create stream socket");
+ return -1;
+ }
+ qemu_socket_set_nonblock(fd);
+
+ socket_set_fast_reuse(fd);
+
+ ret = bind(fd, (struct sockaddr *)&saddr_in, sizeof(saddr_in));
+ if (ret < 0) {
+ error_setg_errno(errp, errno, "can't bind ip=%s to socket",
+ inet_ntoa(saddr_in.sin_addr));
+ closesocket(fd);
+ return -1;
+ }
+ break;
+ }
+ case SOCKET_ADDRESS_TYPE_FD:
+ fd = monitor_fd_param(monitor_cur(), addr->u.fd.str, errp);
+ if (fd == -1) {
+ return -1;
+ }
+ ret = qemu_socket_try_set_nonblock(fd);
+ if (ret < 0) {
+ error_setg_errno(errp, -ret, "%s: Can't use file descriptor %d",
+ name, fd);
+ return -1;
+ }
+ break;
+ default:
+ error_setg(errp, "only support inet or fd type");
+ return -1;
+ }
+
+ ret = listen(fd, 0);
+ if (ret < 0) {
+ error_setg_errno(errp, errno, "can't listen on socket");
+ closesocket(fd);
+ return -1;
+ }
+
+ nc = qemu_new_net_client(&net_stream_info, peer, model, name);
+ s = DO_UPCAST(NetStreamState, nc, nc);
+ s->fd = -1;
+ s->listen_fd = fd;
+ s->nc.link_down = true;
+ net_socket_rs_init(&s->rs, net_stream_rs_finalize, false);
+
+ qemu_set_fd_handler(s->listen_fd, net_stream_accept, NULL, s);
+ return 0;
+}
+
+static int net_stream_client_init(NetClientState *peer,
+ const char *model,
+ const char *name,
+ SocketAddress *addr,
+ Error **errp)
+{
+ NetStreamState *s;
+ int fd, connected, ret;
+ gchar *info_str;
+
+ switch (addr->type) {
+ case SOCKET_ADDRESS_TYPE_INET: {
+ struct sockaddr_in saddr_in;
+
+ if (convert_host_port(&saddr_in, addr->u.inet.host, addr->u.inet.port,
+ errp) < 0) {
+ return -1;
+ }
+
+ fd = qemu_socket(PF_INET, SOCK_STREAM, 0);
+ if (fd < 0) {
+ error_setg_errno(errp, errno, "can't create stream socket");
+ return -1;
+ }
+ qemu_socket_set_nonblock(fd);
+
+ connected = 0;
+ for (;;) {
+ ret = connect(fd, (struct sockaddr *)&saddr_in, sizeof(saddr_in));
+ if (ret < 0) {
+ if (errno == EINTR || errno == EWOULDBLOCK) {
+ /* continue */
+ } else if (errno == EINPROGRESS ||
+ errno == EALREADY ||
+ errno == EINVAL) {
+ break;
+ } else {
+ error_setg_errno(errp, errno, "can't connect socket");
+ closesocket(fd);
+ return -1;
+ }
+ } else {
+ connected = 1;
+ break;
+ }
+ }
+ info_str = g_strdup_printf("connect to %s:%d",
+ inet_ntoa(saddr_in.sin_addr),
+ ntohs(saddr_in.sin_port));
+ break;
+ }
+ case SOCKET_ADDRESS_TYPE_FD:
+ fd = monitor_fd_param(monitor_cur(), addr->u.fd.str, errp);
+ if (fd == -1) {
+ return -1;
+ }
+ ret = qemu_socket_try_set_nonblock(fd);
+ if (ret < 0) {
+ error_setg_errno(errp, -ret, "%s: Can't use file descriptor %d",
+ name, fd);
+ return -1;
+ }
+ connected = 1;
+ info_str = g_strdup_printf("connect to fd %d", fd);
+ break;
+ default:
+ error_setg(errp, "only support inet or fd type");
+ return -1;
+ }
+
+ s = net_stream_fd_init_stream(peer, model, name, fd, connected);
+
+ pstrcpy(s->nc.info_str, sizeof(s->nc.info_str), info_str);
+ g_free(info_str);
+
+ return 0;
+}
+
+int net_init_stream(const Netdev *netdev, const char *name,
+ NetClientState *peer, Error **errp)
+{
+ const NetdevStreamOptions *sock;
+
+ assert(netdev->type == NET_CLIENT_DRIVER_STREAM);
+ sock = &netdev->u.stream;
+
+ if (!sock->has_server || sock->server) {
+ return net_stream_server_init(peer, "stream", name, sock->addr, errp);
+ }
+ return net_stream_client_init(peer, "stream", name, sock->addr, errp);
+}
diff --git a/qapi/net.json b/qapi/net.json
index dd088c09c509..e02e8001a000 100644
--- a/qapi/net.json
+++ b/qapi/net.json
@@ -7,6 +7,7 @@
##
{ 'include': 'common.json' }
+{ 'include': 'sockets.json' }
##
# @set_link:
@@ -573,6 +574,61 @@
'*isolated': 'bool' },
'if': 'CONFIG_VMNET' }
+##
+# @NetdevStreamOptions:
+#
+# Configuration info for stream socket netdev
+#
+# @addr: socket address to listen on (server=true)
+# or connect to (server=false)
+# @server: create server socket (default: true)
+#
+# Only SocketAddress types 'inet' and 'fd' are supported.
+#
+# Since: 7.1
+##
+{ 'struct': 'NetdevStreamOptions',
+ 'data': {
+ 'addr': 'SocketAddress',
+ '*server': 'bool' } }
+
+##
+# @NetdevDgramOptions:
+#
+# Configuration info for datagram socket netdev.
+#
+# @remote: remote address
+# @local: local address
+#
+# Only SocketAddress types 'inet' and 'fd' are supported.
+#
+# The code checks there is at least one of these options and reports an error
+# if not. If remote address is present and it's a multicast address, local
+# address is optional. Otherwise local address is required and remote address
+# is optional.
+#
+# .. table:: Valid parameters combination table
+# :widths: auto
+#
+# ============= ======== =====
+# remote local okay?
+# ============= ======== =====
+# absent absent no
+# absent not fd no
+# absent fd yes
+# multicast absent yes
+# multicast present yes
+# not multicast absent no
+# not multicast present yes
+# ============= ======== =====
+#
+# Since: 7.1
+##
+{ 'struct': 'NetdevDgramOptions',
+ 'data': {
+ '*local': 'SocketAddress',
+ '*remote': 'SocketAddress' } }
+
##
# @NetClientDriver:
#
@@ -586,8 +642,9 @@
# @vmnet-bridged since 7.1
##
{ 'enum': 'NetClientDriver',
- 'data': [ 'none', 'nic', 'user', 'tap', 'l2tpv3', 'socket', 'vde',
- 'bridge', 'hubport', 'netmap', 'vhost-user', 'vhost-vdpa',
+ 'data': [ 'none', 'nic', 'user', 'tap', 'l2tpv3', 'socket', 'stream',
+ 'dgram', 'vde', 'bridge', 'hubport', 'netmap', 'vhost-user',
+ 'vhost-vdpa',
{ 'name': 'vmnet-host', 'if': 'CONFIG_VMNET' },
{ 'name': 'vmnet-shared', 'if': 'CONFIG_VMNET' },
{ 'name': 'vmnet-bridged', 'if': 'CONFIG_VMNET' }] }
@@ -617,6 +674,8 @@
'tap': 'NetdevTapOptions',
'l2tpv3': 'NetdevL2TPv3Options',
'socket': 'NetdevSocketOptions',
+ 'stream': 'NetdevStreamOptions',
+ 'dgram': 'NetdevDgramOptions',
'vde': 'NetdevVdeOptions',
'bridge': 'NetdevBridgeOptions',
'hubport': 'NetdevHubPortOptions',
diff --git a/qemu-options.hx b/qemu-options.hx
index 31c04f7eea0b..bb16a61bae8e 100644
--- a/qemu-options.hx
+++ b/qemu-options.hx
@@ -2732,6 +2732,18 @@ DEF("netdev", HAS_ARG, QEMU_OPTION_netdev,
"-netdev socket,id=str[,fd=h][,udp=host:port][,localaddr=host:port]\n"
" configure a network backend to connect to another network\n"
" using an UDP tunnel\n"
+ "-netdev stream,id=str[,server=on|off],addr.type=inet,addr.host=host,addr.port=port\n"
+ "-netdev stream,id=str[,server=on|off],addr.type=fd,addr.str=h\n"
+ " configure a network backend to connect to another network\n"
+ " using a socket connection in stream mode.\n"
+ "-netdev dgram,id=str,remote.type=inet,remote.host=maddr,remote.port=port[,local.type=inet,local.host=addr]\n"
+ "-netdev dgram,id=str,remote.type=inet,remote.host=maddr,remote.port=port[,local.type=fd,local.str=h]\n"
+ " configure a network backend to connect to a multicast maddr and port\n"
+ " use ``local.host=addr`` to specify the host address to send packets from\n"
+ "-netdev dgram,id=str,local.type=inet,local.host=addr,local.port=port[,remote.type=inet,remote.host=addr,remote.port=port]\n"
+ "-netdev dgram,id=str,local.type=fd,local.str=h\n"
+ " configure a network backend to connect to another network\n"
+ " using an UDP tunnel\n"
#ifdef CONFIG_VDE
"-netdev vde,id=str[,sock=socketpath][,port=n][,group=groupname][,mode=octalmode]\n"
" configure a network backend to connect to port 'n' of a vde switch\n"
--
2.37.3
^ permalink raw reply related [flat|nested] 31+ messages in thread
* [PATCH v8 06/14] net: stream: Don't ignore EINVAL on netdev socket connection
2022-09-13 6:39 [PATCH v8 00/14] qapi: net: add unix socket type support to netdev backend Laurent Vivier
` (4 preceding siblings ...)
2022-09-13 6:39 ` [PATCH v8 05/14] qapi: net: add stream and dgram netdevs Laurent Vivier
@ 2022-09-13 6:39 ` Laurent Vivier
2022-09-14 5:05 ` David Gibson
2022-09-13 6:39 ` [PATCH v8 07/14] net: stream: add unix socket Laurent Vivier
` (8 subsequent siblings)
14 siblings, 1 reply; 31+ messages in thread
From: Laurent Vivier @ 2022-09-13 6:39 UTC (permalink / raw)
To: qemu-devel
Cc: Jason Wang, Paolo Bonzini, Gregory Kurz, Daniel P. Berrangé,
Laurent Vivier, Eric Blake, Markus Armbruster, Thomas Huth,
David Gibson, Dr. David Alan Gilbert, Stefano Brivio
From: Stefano Brivio <sbrivio@redhat.com>
Other errors are treated as failure by net_stream_client_init(),
but if connect() returns EINVAL, we'll fail silently. Remove the
related exception.
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
[lvivier: applied to net/stream.c]
Signed-off-by: Laurent Vivier <lvivier@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
---
net/stream.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/net/stream.c b/net/stream.c
index 0851e90becca..e8afbaca50b6 100644
--- a/net/stream.c
+++ b/net/stream.c
@@ -363,8 +363,7 @@ static int net_stream_client_init(NetClientState *peer,
if (errno == EINTR || errno == EWOULDBLOCK) {
/* continue */
} else if (errno == EINPROGRESS ||
- errno == EALREADY ||
- errno == EINVAL) {
+ errno == EALREADY) {
break;
} else {
error_setg_errno(errp, errno, "can't connect socket");
--
2.37.3
^ permalink raw reply related [flat|nested] 31+ messages in thread
* [PATCH v8 07/14] net: stream: add unix socket
2022-09-13 6:39 [PATCH v8 00/14] qapi: net: add unix socket type support to netdev backend Laurent Vivier
` (5 preceding siblings ...)
2022-09-13 6:39 ` [PATCH v8 06/14] net: stream: Don't ignore EINVAL on netdev socket connection Laurent Vivier
@ 2022-09-13 6:39 ` Laurent Vivier
2022-09-14 5:16 ` David Gibson
2022-09-13 6:39 ` [PATCH v8 08/14] net: dgram: make dgram_dst generic Laurent Vivier
` (7 subsequent siblings)
14 siblings, 1 reply; 31+ messages in thread
From: Laurent Vivier @ 2022-09-13 6:39 UTC (permalink / raw)
To: qemu-devel
Cc: Jason Wang, Paolo Bonzini, Gregory Kurz, Daniel P. Berrangé,
Laurent Vivier, Eric Blake, Markus Armbruster, Thomas Huth,
David Gibson, Dr. David Alan Gilbert, Stefano Brivio
Signed-off-by: Laurent Vivier <lvivier@redhat.com>
Reviewed-by: Stefano Brivio <sbrivio@redhat.com>
---
net/stream.c | 108 +++++++++++++++++++++++++++++++++++++++++++++---
qapi/net.json | 2 +-
qemu-options.hx | 1 +
3 files changed, 105 insertions(+), 6 deletions(-)
diff --git a/net/stream.c b/net/stream.c
index e8afbaca50b6..0f91ff20df61 100644
--- a/net/stream.c
+++ b/net/stream.c
@@ -235,7 +235,7 @@ static NetStreamState *net_stream_fd_init_stream(NetClientState *peer,
static void net_stream_accept(void *opaque)
{
NetStreamState *s = opaque;
- struct sockaddr_in saddr;
+ struct sockaddr_storage saddr;
socklen_t len;
int fd;
@@ -253,9 +253,27 @@ static void net_stream_accept(void *opaque)
s->fd = fd;
s->nc.link_down = false;
net_stream_connect(s);
- snprintf(s->nc.info_str, sizeof(s->nc.info_str),
- "connection from %s:%d",
- inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
+ switch (saddr.ss_family) {
+ case AF_INET: {
+ struct sockaddr_in *saddr_in = (struct sockaddr_in *)&saddr;
+
+ snprintf(s->nc.info_str, sizeof(s->nc.info_str),
+ "connection from %s:%d",
+ inet_ntoa(saddr_in->sin_addr), ntohs(saddr_in->sin_port));
+ break;
+ }
+ case AF_UNIX: {
+ struct sockaddr_un saddr_un;
+
+ len = sizeof(saddr_un);
+ getsockname(s->listen_fd, (struct sockaddr *)&saddr_un, &len);
+ snprintf(s->nc.info_str, sizeof(s->nc.info_str),
+ "connect from %s", saddr_un.sun_path);
+ break;
+ }
+ default:
+ g_assert_not_reached();
+ }
}
static int net_stream_server_init(NetClientState *peer,
@@ -295,6 +313,43 @@ static int net_stream_server_init(NetClientState *peer,
}
break;
}
+ case SOCKET_ADDRESS_TYPE_UNIX: {
+ struct sockaddr_un saddr_un;
+
+ ret = unlink(addr->u.q_unix.path);
+ if (ret < 0 && errno != ENOENT) {
+ error_setg_errno(errp, errno, "failed to unlink socket %s",
+ addr->u.q_unix.path);
+ return -1;
+ }
+
+ saddr_un.sun_family = PF_UNIX;
+ ret = snprintf(saddr_un.sun_path, sizeof(saddr_un.sun_path), "%s",
+ addr->u.q_unix.path);
+ if (ret < 0 || ret >= sizeof(saddr_un.sun_path)) {
+ error_setg(errp, "UNIX socket path '%s' is too long",
+ addr->u.q_unix.path);
+ error_append_hint(errp, "Path must be less than %zu bytes\n",
+ sizeof(saddr_un.sun_path));
+ return -1;
+ }
+
+ fd = qemu_socket(PF_UNIX, SOCK_STREAM, 0);
+ if (fd < 0) {
+ error_setg_errno(errp, errno, "can't create stream socket");
+ return -1;
+ }
+ qemu_socket_set_nonblock(fd);
+
+ ret = bind(fd, (struct sockaddr *)&saddr_un, sizeof(saddr_un));
+ if (ret < 0) {
+ error_setg_errno(errp, errno, "can't create socket with path: %s",
+ saddr_un.sun_path);
+ closesocket(fd);
+ return -1;
+ }
+ break;
+ }
case SOCKET_ADDRESS_TYPE_FD:
fd = monitor_fd_param(monitor_cur(), addr->u.fd.str, errp);
if (fd == -1) {
@@ -380,6 +435,49 @@ static int net_stream_client_init(NetClientState *peer,
ntohs(saddr_in.sin_port));
break;
}
+ case SOCKET_ADDRESS_TYPE_UNIX: {
+ struct sockaddr_un saddr_un;
+
+ saddr_un.sun_family = PF_UNIX;
+ ret = snprintf(saddr_un.sun_path, sizeof(saddr_un.sun_path), "%s",
+ addr->u.q_unix.path);
+ if (ret < 0 || ret >= sizeof(saddr_un.sun_path)) {
+ error_setg(errp, "UNIX socket path '%s' is too long",
+ addr->u.q_unix.path);
+ error_append_hint(errp, "Path must be less than %zu bytes\n",
+ sizeof(saddr_un.sun_path));
+ return -1;
+ }
+
+ fd = qemu_socket(PF_UNIX, SOCK_STREAM, 0);
+ if (fd < 0) {
+ error_setg_errno(errp, errno, "can't create stream socket");
+ return -1;
+ }
+ qemu_socket_set_nonblock(fd);
+
+ connected = 0;
+ for (;;) {
+ ret = connect(fd, (struct sockaddr *)&saddr_un, sizeof(saddr_un));
+ if (ret < 0) {
+ if (errno == EINTR || errno == EWOULDBLOCK) {
+ /* continue */
+ } else if (errno == EAGAIN ||
+ errno == EALREADY) {
+ break;
+ } else {
+ error_setg_errno(errp, errno, "can't connect socket");
+ closesocket(fd);
+ return -1;
+ }
+ } else {
+ connected = 1;
+ break;
+ }
+ }
+ info_str = g_strdup_printf(" connect to %s", saddr_un.sun_path);
+ break;
+ }
case SOCKET_ADDRESS_TYPE_FD:
fd = monitor_fd_param(monitor_cur(), addr->u.fd.str, errp);
if (fd == -1) {
@@ -395,7 +493,7 @@ static int net_stream_client_init(NetClientState *peer,
info_str = g_strdup_printf("connect to fd %d", fd);
break;
default:
- error_setg(errp, "only support inet or fd type");
+ error_setg(errp, "only support inet, unix or fd type");
return -1;
}
diff --git a/qapi/net.json b/qapi/net.json
index e02e8001a000..bb96701a49a7 100644
--- a/qapi/net.json
+++ b/qapi/net.json
@@ -583,7 +583,7 @@
# or connect to (server=false)
# @server: create server socket (default: true)
#
-# Only SocketAddress types 'inet' and 'fd' are supported.
+# Only SocketAddress types 'unix', 'inet' and 'fd' are supported.
#
# Since: 7.1
##
diff --git a/qemu-options.hx b/qemu-options.hx
index bb16a61bae8e..8870bcce6bcd 100644
--- a/qemu-options.hx
+++ b/qemu-options.hx
@@ -2733,6 +2733,7 @@ DEF("netdev", HAS_ARG, QEMU_OPTION_netdev,
" configure a network backend to connect to another network\n"
" using an UDP tunnel\n"
"-netdev stream,id=str[,server=on|off],addr.type=inet,addr.host=host,addr.port=port\n"
+ "-netdev stream,id=str[,server=on|off],addr.type=unix,addr.path=path\n"
"-netdev stream,id=str[,server=on|off],addr.type=fd,addr.str=h\n"
" configure a network backend to connect to another network\n"
" using a socket connection in stream mode.\n"
--
2.37.3
^ permalink raw reply related [flat|nested] 31+ messages in thread
* [PATCH v8 08/14] net: dgram: make dgram_dst generic
2022-09-13 6:39 [PATCH v8 00/14] qapi: net: add unix socket type support to netdev backend Laurent Vivier
` (6 preceding siblings ...)
2022-09-13 6:39 ` [PATCH v8 07/14] net: stream: add unix socket Laurent Vivier
@ 2022-09-13 6:39 ` Laurent Vivier
2022-09-13 6:39 ` [PATCH v8 09/14] net: dgram: move mcast specific code from net_socket_fd_init_dgram() Laurent Vivier
` (6 subsequent siblings)
14 siblings, 0 replies; 31+ messages in thread
From: Laurent Vivier @ 2022-09-13 6:39 UTC (permalink / raw)
To: qemu-devel
Cc: Jason Wang, Paolo Bonzini, Gregory Kurz, Daniel P. Berrangé,
Laurent Vivier, Eric Blake, Markus Armbruster, Thomas Huth,
David Gibson, Dr. David Alan Gilbert, Stefano Brivio
dgram_dst is a sockaddr_in structure. To be able to use it with
unix socket, use a pointer to a generic sockaddr structure.
Signed-off-by: Laurent Vivier <lvivier@redhat.com>
Reviewed-by: Stefano Brivio <sbrivio@redhat.com>
---
net/dgram.c | 76 +++++++++++++++++++++++++++++++----------------------
1 file changed, 45 insertions(+), 31 deletions(-)
diff --git a/net/dgram.c b/net/dgram.c
index dbe65102d174..dcc2205305c5 100644
--- a/net/dgram.c
+++ b/net/dgram.c
@@ -40,9 +40,8 @@ typedef struct NetDgramState {
int listen_fd;
int fd;
SocketReadState rs;
- /* contains inet host and port destination iff connectionless (SOCK_DGRAM) */
- struct sockaddr_in dgram_dst;
- IOHandler *send_fn; /* differs between SOCK_STREAM/SOCK_DGRAM */
+ struct sockaddr *dgram_dst; /* contains destination iff connectionless */
+ IOHandler *send_fn;
bool read_poll; /* waiting to receive data? */
bool write_poll; /* waiting to transmit data? */
} NetDgramState;
@@ -86,10 +85,9 @@ static ssize_t net_dgram_receive_dgram(NetClientState *nc,
ssize_t ret;
do {
- if (s->dgram_dst.sin_family != AF_UNIX) {
- ret = sendto(s->fd, buf, size, 0,
- (struct sockaddr *)&s->dgram_dst,
- sizeof(s->dgram_dst));
+ if (s->dgram_dst) {
+ ret = sendto(s->fd, buf, size, 0, s->dgram_dst,
+ sizeof(struct sockaddr_in));
} else {
ret = send(s->fd, buf, size, 0);
}
@@ -290,6 +288,8 @@ static void net_dgram_cleanup(NetClientState *nc)
closesocket(s->listen_fd);
s->listen_fd = -1;
}
+ g_free(s->dgram_dst);
+ s->dgram_dst = NULL;
}
static NetClientInfo net_dgram_socket_info = {
@@ -306,7 +306,7 @@ static NetDgramState *net_dgram_fd_init_dgram(NetClientState *peer,
SocketAddress *mcast,
Error **errp)
{
- struct sockaddr_in saddr;
+ struct sockaddr_in *saddr = NULL;
int newfd;
NetClientState *nc;
NetDgramState *s;
@@ -328,24 +328,25 @@ static NetDgramState *net_dgram_fd_init_dgram(NetClientState *peer,
*/
if (is_fd && mcast != NULL) {
- if (convert_host_port(&saddr, mcast->u.inet.host,
- mcast->u.inet.port, errp) < 0) {
+ saddr = g_new(struct sockaddr_in, 1);
+
+ if (convert_host_port(saddr, mcast->u.inet.host, mcast->u.inet.port,
+ errp) < 0) {
goto err;
}
/* must be bound */
- if (saddr.sin_addr.s_addr == 0) {
+ if (saddr->sin_addr.s_addr == 0) {
error_setg(errp, "can't setup multicast destination address");
goto err;
}
/* clone dgram socket */
- newfd = net_dgram_mcast_create(&saddr, NULL, errp);
+ newfd = net_dgram_mcast_create(saddr, NULL, errp);
if (newfd < 0) {
goto err;
}
/* clone newfd to fd, close newfd */
dup2(newfd, fd);
close(newfd);
-
}
nc = qemu_new_net_client(&net_dgram_socket_info, peer, model, name);
@@ -359,16 +360,13 @@ static NetDgramState *net_dgram_fd_init_dgram(NetClientState *peer,
net_dgram_read_poll(s, true);
/* mcast: save bound address as dst */
- if (is_fd && mcast != NULL) {
- s->dgram_dst = saddr;
+ if (saddr) {
+ g_assert(s->dgram_dst == NULL);
+ s->dgram_dst = (struct sockaddr *)saddr;
snprintf(nc->info_str, sizeof(nc->info_str),
"fd=%d (cloned mcast=%s:%d)",
- fd, inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
+ fd, inet_ntoa(saddr->sin_addr), ntohs(saddr->sin_port));
} else {
- if (sa_type == SOCKET_ADDRESS_TYPE_UNIX) {
- s->dgram_dst.sin_family = AF_UNIX;
- }
-
snprintf(nc->info_str, sizeof(nc->info_str), "fd=%d %s", fd,
SocketAddressType_str(sa_type));
}
@@ -376,6 +374,7 @@ static NetDgramState *net_dgram_fd_init_dgram(NetClientState *peer,
return s;
err:
+ g_free(saddr);
closesocket(fd);
return NULL;
}
@@ -421,21 +420,24 @@ static int net_dgram_mcast_init(NetClientState *peer,
{
NetDgramState *s;
int fd, ret;
- struct sockaddr_in saddr;
+ struct sockaddr_in *saddr;
if (remote->type != SOCKET_ADDRESS_TYPE_INET) {
error_setg(errp, "multicast only support inet type");
return -1;
}
- if (convert_host_port(&saddr, remote->u.inet.host, remote->u.inet.port,
+ saddr = g_new(struct sockaddr_in, 1);
+ if (convert_host_port(saddr, remote->u.inet.host, remote->u.inet.port,
errp) < 0) {
+ g_free(saddr);
return -1;
}
if (!local) {
- fd = net_dgram_mcast_create(&saddr, NULL, errp);
+ fd = net_dgram_mcast_create(saddr, NULL, errp);
if (fd < 0) {
+ g_free(saddr);
return -1;
}
} else {
@@ -444,13 +446,15 @@ static int net_dgram_mcast_init(NetClientState *peer,
struct in_addr localaddr;
if (inet_aton(local->u.inet.host, &localaddr) == 0) {
+ g_free(saddr);
error_setg(errp, "localaddr '%s' is not a valid IPv4 address",
local->u.inet.host);
return -1;
}
- fd = net_dgram_mcast_create(&saddr, &localaddr, errp);
+ fd = net_dgram_mcast_create(saddr, &localaddr, errp);
if (fd < 0) {
+ g_free(saddr);
return -1;
}
break;
@@ -458,16 +462,19 @@ static int net_dgram_mcast_init(NetClientState *peer,
case SOCKET_ADDRESS_TYPE_FD:
fd = monitor_fd_param(monitor_cur(), local->u.fd.str, errp);
if (fd == -1) {
+ g_free(saddr);
return -1;
}
ret = qemu_socket_try_set_nonblock(fd);
if (ret < 0) {
+ g_free(saddr);
error_setg_errno(errp, -ret, "%s: Can't use file descriptor %d",
name, fd);
return -1;
}
break;
default:
+ g_free(saddr);
error_setg(errp, "only support inet or fd type for local");
return -1;
}
@@ -477,13 +484,16 @@ static int net_dgram_mcast_init(NetClientState *peer,
local->type == SOCKET_ADDRESS_TYPE_FD,
remote, errp);
if (!s) {
+ g_free(saddr);
return -1;
}
- s->dgram_dst = saddr;
+ g_assert(s->dgram_dst == NULL);
+ s->dgram_dst = (struct sockaddr *)saddr;
snprintf(s->nc.info_str, sizeof(s->nc.info_str), "mcast=%s:%d",
- inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
+ inet_ntoa(saddr->sin_addr), ntohs(saddr->sin_port));
+
return 0;
}
@@ -497,8 +507,8 @@ static int net_dgram_udp_init(NetClientState *peer,
{
NetDgramState *s;
int fd, ret;
- struct sockaddr_in raddr_in;
gchar *info_str;
+ struct sockaddr *dgram_dst;
if (remote) {
if (local->type == SOCKET_ADDRESS_TYPE_FD) {
@@ -518,7 +528,7 @@ static int net_dgram_udp_init(NetClientState *peer,
switch (local->type) {
case SOCKET_ADDRESS_TYPE_INET: {
- struct sockaddr_in laddr_in;
+ struct sockaddr_in laddr_in, raddr_in;
if (convert_host_port(&laddr_in, local->u.inet.host, local->u.inet.port,
errp) < 0) {
@@ -552,9 +562,12 @@ static int net_dgram_udp_init(NetClientState *peer,
}
qemu_socket_set_nonblock(fd);
+ dgram_dst = g_malloc(sizeof(raddr_in));
+ memcpy(dgram_dst, &raddr_in, sizeof(raddr_in));
+
info_str = g_strdup_printf("udp=%s:%d/%s:%d",
- inet_ntoa(laddr_in.sin_addr), ntohs(laddr_in.sin_port),
- inet_ntoa(raddr_in.sin_addr), ntohs(raddr_in.sin_port));
+ inet_ntoa(laddr_in.sin_addr), ntohs(laddr_in.sin_port),
+ inet_ntoa(raddr_in.sin_addr), ntohs(raddr_in.sin_port));
break;
}
@@ -581,7 +594,8 @@ static int net_dgram_udp_init(NetClientState *peer,
}
if (remote) {
- s->dgram_dst = raddr_in;
+ g_assert(s->dgram_dst == NULL);
+ s->dgram_dst = dgram_dst;
pstrcpy(s->nc.info_str, sizeof(s->nc.info_str), info_str);
g_free(info_str);
--
2.37.3
^ permalink raw reply related [flat|nested] 31+ messages in thread
* [PATCH v8 09/14] net: dgram: move mcast specific code from net_socket_fd_init_dgram()
2022-09-13 6:39 [PATCH v8 00/14] qapi: net: add unix socket type support to netdev backend Laurent Vivier
` (7 preceding siblings ...)
2022-09-13 6:39 ` [PATCH v8 08/14] net: dgram: make dgram_dst generic Laurent Vivier
@ 2022-09-13 6:39 ` Laurent Vivier
2022-09-13 6:39 ` [PATCH v8 10/14] net: dgram: add unix socket Laurent Vivier
` (5 subsequent siblings)
14 siblings, 0 replies; 31+ messages in thread
From: Laurent Vivier @ 2022-09-13 6:39 UTC (permalink / raw)
To: qemu-devel
Cc: Jason Wang, Paolo Bonzini, Gregory Kurz, Daniel P. Berrangé,
Laurent Vivier, Eric Blake, Markus Armbruster, Thomas Huth,
David Gibson, Dr. David Alan Gilbert, Stefano Brivio
It is less complex to manage special cases directly in
net_dgram_mcast_init() and net_dgram_udp_init().
Signed-off-by: Laurent Vivier <lvivier@redhat.com>
Reviewed-by: Stefano Brivio <sbrivio@redhat.com>
---
net/dgram.c | 143 +++++++++++++++++++++++++++-------------------------
1 file changed, 73 insertions(+), 70 deletions(-)
diff --git a/net/dgram.c b/net/dgram.c
index dcc2205305c5..16e2d909755c 100644
--- a/net/dgram.c
+++ b/net/dgram.c
@@ -302,52 +302,11 @@ static NetClientInfo net_dgram_socket_info = {
static NetDgramState *net_dgram_fd_init_dgram(NetClientState *peer,
const char *model,
const char *name,
- int fd, int is_fd,
- SocketAddress *mcast,
+ int fd,
Error **errp)
{
- struct sockaddr_in *saddr = NULL;
- int newfd;
NetClientState *nc;
NetDgramState *s;
- SocketAddress *sa;
- SocketAddressType sa_type;
-
- sa = socket_local_address(fd, errp);
- if (!sa) {
- return NULL;
- }
- sa_type = sa->type;
- qapi_free_SocketAddress(sa);
-
- /*
- * fd passed: multicast: "learn" dgram_dst address from bound address and
- * save it. Because this may be "shared" socket from a "master" process,
- * datagrams would be recv() by ONLY ONE process: we must "clone" this
- * dgram socket --jjo
- */
-
- if (is_fd && mcast != NULL) {
- saddr = g_new(struct sockaddr_in, 1);
-
- if (convert_host_port(saddr, mcast->u.inet.host, mcast->u.inet.port,
- errp) < 0) {
- goto err;
- }
- /* must be bound */
- if (saddr->sin_addr.s_addr == 0) {
- error_setg(errp, "can't setup multicast destination address");
- goto err;
- }
- /* clone dgram socket */
- newfd = net_dgram_mcast_create(saddr, NULL, errp);
- if (newfd < 0) {
- goto err;
- }
- /* clone newfd to fd, close newfd */
- dup2(newfd, fd);
- close(newfd);
- }
nc = qemu_new_net_client(&net_dgram_socket_info, peer, model, name);
@@ -359,24 +318,7 @@ static NetDgramState *net_dgram_fd_init_dgram(NetClientState *peer,
net_socket_rs_init(&s->rs, net_dgram_rs_finalize, false);
net_dgram_read_poll(s, true);
- /* mcast: save bound address as dst */
- if (saddr) {
- g_assert(s->dgram_dst == NULL);
- s->dgram_dst = (struct sockaddr *)saddr;
- snprintf(nc->info_str, sizeof(nc->info_str),
- "fd=%d (cloned mcast=%s:%d)",
- fd, inet_ntoa(saddr->sin_addr), ntohs(saddr->sin_port));
- } else {
- snprintf(nc->info_str, sizeof(nc->info_str), "fd=%d %s", fd,
- SocketAddressType_str(sa_type));
- }
-
return s;
-
-err:
- g_free(saddr);
- closesocket(fd);
- return NULL;
}
static void net_dgram_connect(void *opaque)
@@ -421,6 +363,7 @@ static int net_dgram_mcast_init(NetClientState *peer,
NetDgramState *s;
int fd, ret;
struct sockaddr_in *saddr;
+ gchar *info_str;
if (remote->type != SOCKET_ADDRESS_TYPE_INET) {
error_setg(errp, "multicast only support inet type");
@@ -440,6 +383,9 @@ static int net_dgram_mcast_init(NetClientState *peer,
g_free(saddr);
return -1;
}
+ info_str = g_strdup_printf("mcast=%s:%d",
+ inet_ntoa(saddr->sin_addr),
+ ntohs(saddr->sin_port));
} else {
switch (local->type) {
case SOCKET_ADDRESS_TYPE_INET: {
@@ -457,9 +403,14 @@ static int net_dgram_mcast_init(NetClientState *peer,
g_free(saddr);
return -1;
}
+ info_str = g_strdup_printf("mcast=%s:%d",
+ inet_ntoa(saddr->sin_addr),
+ ntohs(saddr->sin_port));
break;
}
- case SOCKET_ADDRESS_TYPE_FD:
+ case SOCKET_ADDRESS_TYPE_FD: {
+ int newfd;
+
fd = monitor_fd_param(monitor_cur(), local->u.fd.str, errp);
if (fd == -1) {
g_free(saddr);
@@ -472,7 +423,46 @@ static int net_dgram_mcast_init(NetClientState *peer,
name, fd);
return -1;
}
+
+ /*
+ * fd passed: multicast: "learn" dgram_dst address from bound
+ * address and save it. Because this may be "shared" socket from a
+ * "master" process, datagrams would be recv() by ONLY ONE process:
+ * we must "clone" this dgram socket --jjo
+ */
+
+ saddr = g_new(struct sockaddr_in, 1);
+
+ if (convert_host_port(saddr, local->u.inet.host, local->u.inet.port,
+ errp) < 0) {
+ g_free(saddr);
+ closesocket(fd);
+ return -1;
+ }
+
+ /* must be bound */
+ if (saddr->sin_addr.s_addr == 0) {
+ error_setg(errp, "can't setup multicast destination address");
+ g_free(saddr);
+ closesocket(fd);
+ return -1;
+ }
+ /* clone dgram socket */
+ newfd = net_dgram_mcast_create(saddr, NULL, errp);
+ if (newfd < 0) {
+ g_free(saddr);
+ closesocket(fd);
+ return -1;
+ }
+ /* clone newfd to fd, close newfd */
+ dup2(newfd, fd);
+ close(newfd);
+
+ info_str = g_strdup_printf("fd=%d (cloned mcast=%s:%d)",
+ fd, inet_ntoa(saddr->sin_addr),
+ ntohs(saddr->sin_port));
break;
+ }
default:
g_free(saddr);
error_setg(errp, "only support inet or fd type for local");
@@ -480,9 +470,7 @@ static int net_dgram_mcast_init(NetClientState *peer,
}
}
- s = net_dgram_fd_init_dgram(peer, model, name, fd,
- local->type == SOCKET_ADDRESS_TYPE_FD,
- remote, errp);
+ s = net_dgram_fd_init_dgram(peer, model, name, fd, errp);
if (!s) {
g_free(saddr);
return -1;
@@ -491,8 +479,8 @@ static int net_dgram_mcast_init(NetClientState *peer,
g_assert(s->dgram_dst == NULL);
s->dgram_dst = (struct sockaddr *)saddr;
- snprintf(s->nc.info_str, sizeof(s->nc.info_str), "mcast=%s:%d",
- inet_ntoa(saddr->sin_addr), ntohs(saddr->sin_port));
+ pstrcpy(s->nc.info_str, sizeof(s->nc.info_str), info_str);
+ g_free(info_str);
return 0;
@@ -571,7 +559,10 @@ static int net_dgram_udp_init(NetClientState *peer,
break;
}
- case SOCKET_ADDRESS_TYPE_FD:
+ case SOCKET_ADDRESS_TYPE_FD: {
+ SocketAddress *sa;
+ SocketAddressType sa_type;
+
fd = monitor_fd_param(monitor_cur(), local->u.fd.str, errp);
if (fd == -1) {
return -1;
@@ -582,23 +573,35 @@ static int net_dgram_udp_init(NetClientState *peer,
name, fd);
return -1;
}
+
+ sa = socket_local_address(fd, errp);
+ if (sa) {
+ sa_type = sa->type;
+ qapi_free_SocketAddress(sa);
+
+ info_str = g_strdup_printf("fd=%d %s", fd,
+ SocketAddressType_str(sa_type));
+ } else {
+ info_str = g_strdup_printf("fd=%d", fd);
+ }
break;
+ }
default:
error_setg(errp, "only support inet or fd type for local");
return -1;
}
- s = net_dgram_fd_init_dgram(peer, model, name, fd, 0, NULL, errp);
+ s = net_dgram_fd_init_dgram(peer, model, name, fd, errp);
if (!s) {
return -1;
}
+ pstrcpy(s->nc.info_str, sizeof(s->nc.info_str), info_str);
+ g_free(info_str);
+
if (remote) {
g_assert(s->dgram_dst == NULL);
s->dgram_dst = dgram_dst;
-
- pstrcpy(s->nc.info_str, sizeof(s->nc.info_str), info_str);
- g_free(info_str);
}
return 0;
}
--
2.37.3
^ permalink raw reply related [flat|nested] 31+ messages in thread
* [PATCH v8 10/14] net: dgram: add unix socket
2022-09-13 6:39 [PATCH v8 00/14] qapi: net: add unix socket type support to netdev backend Laurent Vivier
` (8 preceding siblings ...)
2022-09-13 6:39 ` [PATCH v8 09/14] net: dgram: move mcast specific code from net_socket_fd_init_dgram() Laurent Vivier
@ 2022-09-13 6:39 ` Laurent Vivier
2022-09-13 6:39 ` [PATCH v8 11/14] qemu-sockets: move and rename SocketAddress_to_str() Laurent Vivier
` (4 subsequent siblings)
14 siblings, 0 replies; 31+ messages in thread
From: Laurent Vivier @ 2022-09-13 6:39 UTC (permalink / raw)
To: qemu-devel
Cc: Jason Wang, Paolo Bonzini, Gregory Kurz, Daniel P. Berrangé,
Laurent Vivier, Eric Blake, Markus Armbruster, Thomas Huth,
David Gibson, Dr. David Alan Gilbert, Stefano Brivio
Signed-off-by: Laurent Vivier <lvivier@redhat.com>
Reviewed-by: Stefano Brivio <sbrivio@redhat.com>
---
net/dgram.c | 65 ++++++++++++++++++++++++++++++++++++++++++++++---
qapi/net.json | 2 +-
qemu-options.hx | 1 +
3 files changed, 64 insertions(+), 4 deletions(-)
diff --git a/net/dgram.c b/net/dgram.c
index 16e2d909755c..9f3eafee3b67 100644
--- a/net/dgram.c
+++ b/net/dgram.c
@@ -86,8 +86,15 @@ static ssize_t net_dgram_receive_dgram(NetClientState *nc,
do {
if (s->dgram_dst) {
- ret = sendto(s->fd, buf, size, 0, s->dgram_dst,
- sizeof(struct sockaddr_in));
+ socklen_t len;
+
+ if (s->dgram_dst->sa_family == AF_INET) {
+ len = sizeof(struct sockaddr_in);
+ } else {
+ len = sizeof(struct sockaddr_un);
+ }
+
+ ret = sendto(s->fd, buf, size, 0, s->dgram_dst, len);
} else {
ret = send(s->fd, buf, size, 0);
}
@@ -509,7 +516,7 @@ static int net_dgram_udp_init(NetClientState *peer,
}
} else {
if (local->type != SOCKET_ADDRESS_TYPE_FD) {
- error_setg(errp, "type=inet requires remote parameter");
+ error_setg(errp, "type=inet or unix require remote parameter");
return -1;
}
}
@@ -559,6 +566,58 @@ static int net_dgram_udp_init(NetClientState *peer,
break;
}
+ case SOCKET_ADDRESS_TYPE_UNIX: {
+ struct sockaddr_un laddr_un, raddr_un;
+
+ ret = unlink(local->u.q_unix.path);
+ if (ret < 0 && errno != ENOENT) {
+ error_setg_errno(errp, errno, "failed to unlink socket %s",
+ local->u.q_unix.path);
+ return -1;
+ }
+
+ laddr_un.sun_family = PF_UNIX;
+ ret = snprintf(laddr_un.sun_path, sizeof(laddr_un.sun_path), "%s",
+ local->u.q_unix.path);
+ if (ret < 0 || ret >= sizeof(laddr_un.sun_path)) {
+ error_setg(errp, "UNIX socket path '%s' is too long",
+ local->u.q_unix.path);
+ error_append_hint(errp, "Path must be less than %zu bytes\n",
+ sizeof(laddr_un.sun_path));
+ }
+
+ raddr_un.sun_family = PF_UNIX;
+ ret = snprintf(raddr_un.sun_path, sizeof(raddr_un.sun_path), "%s",
+ remote->u.q_unix.path);
+ if (ret < 0 || ret >= sizeof(raddr_un.sun_path)) {
+ error_setg(errp, "UNIX socket path '%s' is too long",
+ remote->u.q_unix.path);
+ error_append_hint(errp, "Path must be less than %zu bytes\n",
+ sizeof(raddr_un.sun_path));
+ }
+
+ fd = qemu_socket(PF_UNIX, SOCK_DGRAM, 0);
+ if (fd < 0) {
+ error_setg_errno(errp, errno, "can't create datagram socket");
+ return -1;
+ }
+
+ ret = bind(fd, (struct sockaddr *)&laddr_un, sizeof(laddr_un));
+ if (ret < 0) {
+ error_setg_errno(errp, errno, "can't bind unix=%s to socket",
+ laddr_un.sun_path);
+ closesocket(fd);
+ return -1;
+ }
+ qemu_socket_set_nonblock(fd);
+
+ dgram_dst = g_malloc(sizeof(raddr_un));
+ memcpy(dgram_dst, &raddr_un, sizeof(raddr_un));
+
+ info_str = g_strdup_printf("udp=%s:%s",
+ laddr_un.sun_path, raddr_un.sun_path);
+ break;
+ }
case SOCKET_ADDRESS_TYPE_FD: {
SocketAddress *sa;
SocketAddressType sa_type;
diff --git a/qapi/net.json b/qapi/net.json
index bb96701a49a7..9cc4be7535bb 100644
--- a/qapi/net.json
+++ b/qapi/net.json
@@ -600,7 +600,7 @@
# @remote: remote address
# @local: local address
#
-# Only SocketAddress types 'inet' and 'fd' are supported.
+# Only SocketAddress types 'unix', 'inet' and 'fd' are supported.
#
# The code checks there is at least one of these options and reports an error
# if not. If remote address is present and it's a multicast address, local
diff --git a/qemu-options.hx b/qemu-options.hx
index 8870bcce6bcd..ee2436ae14a7 100644
--- a/qemu-options.hx
+++ b/qemu-options.hx
@@ -2742,6 +2742,7 @@ DEF("netdev", HAS_ARG, QEMU_OPTION_netdev,
" configure a network backend to connect to a multicast maddr and port\n"
" use ``local.host=addr`` to specify the host address to send packets from\n"
"-netdev dgram,id=str,local.type=inet,local.host=addr,local.port=port[,remote.type=inet,remote.host=addr,remote.port=port]\n"
+ "-netdev dgram,id=str,local.type=unix,local.path=path[,remote.type=unix,remote.path=path]\n"
"-netdev dgram,id=str,local.type=fd,local.str=h\n"
" configure a network backend to connect to another network\n"
" using an UDP tunnel\n"
--
2.37.3
^ permalink raw reply related [flat|nested] 31+ messages in thread
* [PATCH v8 11/14] qemu-sockets: move and rename SocketAddress_to_str()
2022-09-13 6:39 [PATCH v8 00/14] qapi: net: add unix socket type support to netdev backend Laurent Vivier
` (9 preceding siblings ...)
2022-09-13 6:39 ` [PATCH v8 10/14] net: dgram: add unix socket Laurent Vivier
@ 2022-09-13 6:39 ` Laurent Vivier
2022-09-14 5:23 ` David Gibson
2022-09-14 19:08 ` Dr. David Alan Gilbert
2022-09-13 6:39 ` [PATCH v8 12/14] qemu-sockets: update socket_uri() and socket_parse() to be consistent Laurent Vivier
` (3 subsequent siblings)
14 siblings, 2 replies; 31+ messages in thread
From: Laurent Vivier @ 2022-09-13 6:39 UTC (permalink / raw)
To: qemu-devel
Cc: Jason Wang, Paolo Bonzini, Gregory Kurz, Daniel P. Berrangé,
Laurent Vivier, Eric Blake, Markus Armbruster, Thomas Huth,
David Gibson, Dr. David Alan Gilbert
Rename SocketAddress_to_str() to socket_uri() and move it to
util/qemu-sockets.c close to socket_parse().
socket_uri() generates a string from a SocketAddress while
socket_parse() generates a SocketAddress from a string.
Signed-off-by: Laurent Vivier <lvivier@redhat.com>
---
include/qemu/sockets.h | 2 +-
monitor/hmp-cmds.c | 23 +----------------------
util/qemu-sockets.c | 20 ++++++++++++++++++++
3 files changed, 22 insertions(+), 23 deletions(-)
diff --git a/include/qemu/sockets.h b/include/qemu/sockets.h
index 47194b9732f8..e5a06d2e3729 100644
--- a/include/qemu/sockets.h
+++ b/include/qemu/sockets.h
@@ -40,6 +40,7 @@ NetworkAddressFamily inet_netfamily(int family);
int unix_listen(const char *path, Error **errp);
int unix_connect(const char *path, Error **errp);
+char *socket_uri(SocketAddress *addr);
SocketAddress *socket_parse(const char *str, Error **errp);
int socket_connect(SocketAddress *addr, Error **errp);
int socket_listen(SocketAddress *addr, int num, Error **errp);
@@ -123,5 +124,4 @@ SocketAddress *socket_address_flatten(SocketAddressLegacy *addr);
* Return 0 on success.
*/
int socket_address_parse_named_fd(SocketAddress *addr, Error **errp);
-
#endif /* QEMU_SOCKETS_H */
diff --git a/monitor/hmp-cmds.c b/monitor/hmp-cmds.c
index c6cd6f91dde6..cb35059c2d45 100644
--- a/monitor/hmp-cmds.c
+++ b/monitor/hmp-cmds.c
@@ -197,27 +197,6 @@ void hmp_info_mice(Monitor *mon, const QDict *qdict)
qapi_free_MouseInfoList(mice_list);
}
-static char *SocketAddress_to_str(SocketAddress *addr)
-{
- switch (addr->type) {
- case SOCKET_ADDRESS_TYPE_INET:
- return g_strdup_printf("tcp:%s:%s",
- addr->u.inet.host,
- addr->u.inet.port);
- case SOCKET_ADDRESS_TYPE_UNIX:
- return g_strdup_printf("unix:%s",
- addr->u.q_unix.path);
- case SOCKET_ADDRESS_TYPE_FD:
- return g_strdup_printf("fd:%s", addr->u.fd.str);
- case SOCKET_ADDRESS_TYPE_VSOCK:
- return g_strdup_printf("tcp:%s:%s",
- addr->u.vsock.cid,
- addr->u.vsock.port);
- default:
- return g_strdup("unknown address type");
- }
-}
-
void hmp_info_migrate(Monitor *mon, const QDict *qdict)
{
MigrationInfo *info;
@@ -380,7 +359,7 @@ void hmp_info_migrate(Monitor *mon, const QDict *qdict)
monitor_printf(mon, "socket address: [\n");
for (addr = info->socket_address; addr; addr = addr->next) {
- char *s = SocketAddress_to_str(addr->value);
+ char *s = socket_uri(addr->value);
monitor_printf(mon, "\t%s\n", s);
g_free(s);
}
diff --git a/util/qemu-sockets.c b/util/qemu-sockets.c
index 83f4bd6fd211..9f6f655fd526 100644
--- a/util/qemu-sockets.c
+++ b/util/qemu-sockets.c
@@ -1077,6 +1077,26 @@ int unix_connect(const char *path, Error **errp)
return sock;
}
+char *socket_uri(SocketAddress *addr)
+{
+ switch (addr->type) {
+ case SOCKET_ADDRESS_TYPE_INET:
+ return g_strdup_printf("tcp:%s:%s",
+ addr->u.inet.host,
+ addr->u.inet.port);
+ case SOCKET_ADDRESS_TYPE_UNIX:
+ return g_strdup_printf("unix:%s",
+ addr->u.q_unix.path);
+ case SOCKET_ADDRESS_TYPE_FD:
+ return g_strdup_printf("fd:%s", addr->u.fd.str);
+ case SOCKET_ADDRESS_TYPE_VSOCK:
+ return g_strdup_printf("tcp:%s:%s",
+ addr->u.vsock.cid,
+ addr->u.vsock.port);
+ default:
+ return g_strdup("unknown address type");
+ }
+}
SocketAddress *socket_parse(const char *str, Error **errp)
{
--
2.37.3
^ permalink raw reply related [flat|nested] 31+ messages in thread
* [PATCH v8 12/14] qemu-sockets: update socket_uri() and socket_parse() to be consistent
2022-09-13 6:39 [PATCH v8 00/14] qapi: net: add unix socket type support to netdev backend Laurent Vivier
` (10 preceding siblings ...)
2022-09-13 6:39 ` [PATCH v8 11/14] qemu-sockets: move and rename SocketAddress_to_str() Laurent Vivier
@ 2022-09-13 6:39 ` Laurent Vivier
2022-09-14 19:06 ` Dr. David Alan Gilbert
2022-09-21 15:01 ` Markus Armbruster
2022-09-13 6:39 ` [PATCH v8 13/14] net: stream: move to QIO Laurent Vivier
` (2 subsequent siblings)
14 siblings, 2 replies; 31+ messages in thread
From: Laurent Vivier @ 2022-09-13 6:39 UTC (permalink / raw)
To: qemu-devel
Cc: Jason Wang, Paolo Bonzini, Gregory Kurz, Daniel P. Berrangé,
Laurent Vivier, Eric Blake, Markus Armbruster, Thomas Huth,
David Gibson, Dr. David Alan Gilbert
To be consistent with socket_uri(), add 'tcp:' prefix for inet type in
socket_parse(), by default socket_parse() use tcp when no prefix is
provided (format is host:port).
In socket_uri(), use 'vsock:' prefix for vsock type rather than 'tcp:'
because it makes a vsock address look like an inet address with CID
misinterpreted as host.
Goes back to commit 9aca82ba31 "migration: Create socket-address parameter"
Signed-off-by: Laurent Vivier <lvivier@redhat.com>
---
util/qemu-sockets.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/util/qemu-sockets.c b/util/qemu-sockets.c
index 9f6f655fd526..a9926af714c4 100644
--- a/util/qemu-sockets.c
+++ b/util/qemu-sockets.c
@@ -1090,7 +1090,7 @@ char *socket_uri(SocketAddress *addr)
case SOCKET_ADDRESS_TYPE_FD:
return g_strdup_printf("fd:%s", addr->u.fd.str);
case SOCKET_ADDRESS_TYPE_VSOCK:
- return g_strdup_printf("tcp:%s:%s",
+ return g_strdup_printf("vsock:%s:%s",
addr->u.vsock.cid,
addr->u.vsock.port);
default:
@@ -1124,6 +1124,11 @@ SocketAddress *socket_parse(const char *str, Error **errp)
if (vsock_parse(&addr->u.vsock, str + strlen("vsock:"), errp)) {
goto fail;
}
+ } else if (strstart(str, "tcp:", NULL)) {
+ addr->type = SOCKET_ADDRESS_TYPE_INET;
+ if (inet_parse(&addr->u.inet, str + strlen("tcp:"), errp)) {
+ goto fail;
+ }
} else {
addr->type = SOCKET_ADDRESS_TYPE_INET;
if (inet_parse(&addr->u.inet, str, errp)) {
--
2.37.3
^ permalink raw reply related [flat|nested] 31+ messages in thread
* [PATCH v8 13/14] net: stream: move to QIO
2022-09-13 6:39 [PATCH v8 00/14] qapi: net: add unix socket type support to netdev backend Laurent Vivier
` (11 preceding siblings ...)
2022-09-13 6:39 ` [PATCH v8 12/14] qemu-sockets: update socket_uri() and socket_parse() to be consistent Laurent Vivier
@ 2022-09-13 6:39 ` Laurent Vivier
2022-09-21 14:58 ` Markus Armbruster
2022-09-13 6:40 ` [PATCH v8 14/14] tests/qtest: netdev: test stream and dgram backends Laurent Vivier
2022-09-13 10:24 ` [PATCH v8 00/14] qapi: net: add unix socket type support to netdev backend Stefano Brivio
14 siblings, 1 reply; 31+ messages in thread
From: Laurent Vivier @ 2022-09-13 6:39 UTC (permalink / raw)
To: qemu-devel
Cc: Jason Wang, Paolo Bonzini, Gregory Kurz, Daniel P. Berrangé,
Laurent Vivier, Eric Blake, Markus Armbruster, Thomas Huth,
David Gibson, Dr. David Alan Gilbert
Use QIOChannel, QIOChannelSocket and QIONetListener.
Signed-off-by: Laurent Vivier <lvivier@redhat.com>
---
net/stream.c | 482 +++++++++++++++++-------------------------------
qemu-options.hx | 4 +-
2 files changed, 171 insertions(+), 315 deletions(-)
diff --git a/net/stream.c b/net/stream.c
index 0f91ff20df61..a84295f209e2 100644
--- a/net/stream.c
+++ b/net/stream.c
@@ -34,48 +34,36 @@
#include "qemu/iov.h"
#include "qemu/main-loop.h"
#include "qemu/cutils.h"
+#include "io/channel.h"
+#include "io/channel-socket.h"
+#include "io/net-listener.h"
typedef struct NetStreamState {
NetClientState nc;
- int listen_fd;
- int fd;
+ QIOChannel *listen_ioc;
+ QIONetListener *listener;
+ QIOChannel *ioc;
+ guint ioc_read_tag;
+ guint ioc_write_tag;
SocketReadState rs;
unsigned int send_index; /* number of bytes sent*/
- IOHandler *send_fn;
- bool read_poll; /* waiting to receive data? */
- bool write_poll; /* waiting to transmit data? */
} NetStreamState;
-static void net_stream_accept(void *opaque);
-static void net_stream_writable(void *opaque);
+static void net_stream_listen(QIONetListener *listener,
+ QIOChannelSocket *cioc,
+ void *opaque);
-static void net_stream_update_fd_handler(NetStreamState *s)
+static gboolean net_stream_writable(QIOChannel *ioc,
+ GIOCondition condition,
+ gpointer data)
{
- qemu_set_fd_handler(s->fd,
- s->read_poll ? s->send_fn : NULL,
- s->write_poll ? net_stream_writable : NULL,
- s);
-}
+ NetStreamState *s = data;
-static void net_stream_read_poll(NetStreamState *s, bool enable)
-{
- s->read_poll = enable;
- net_stream_update_fd_handler(s);
-}
-
-static void net_stream_write_poll(NetStreamState *s, bool enable)
-{
- s->write_poll = enable;
- net_stream_update_fd_handler(s);
-}
-
-static void net_stream_writable(void *opaque)
-{
- NetStreamState *s = opaque;
-
- net_stream_write_poll(s, false);
+ s->ioc_write_tag = 0;
qemu_flush_queued_packets(&s->nc);
+
+ return G_SOURCE_REMOVE;
}
static ssize_t net_stream_receive(NetClientState *nc, const uint8_t *buf,
@@ -92,13 +80,16 @@ static ssize_t net_stream_receive(NetClientState *nc, const uint8_t *buf,
.iov_len = size,
},
};
+ struct iovec local_iov[2];
+ unsigned int nlocal_iov;
size_t remaining;
ssize_t ret;
- remaining = iov_size(iov, 2) - s->send_index;
- ret = iov_send(s->fd, iov, 2, s->send_index, remaining);
- if (ret == -1 && errno == EAGAIN) {
+ remaining = iov_size(iov, 2) - s->send_index;
+ nlocal_iov = iov_copy(local_iov, 2, iov, 2, s->send_index, remaining);
+ ret = qio_channel_writev(s->ioc, local_iov, nlocal_iov, NULL);
+ if (ret == QIO_CHANNEL_ERR_BLOCK) {
ret = 0; /* handled further down */
}
if (ret == -1) {
@@ -107,19 +98,25 @@ static ssize_t net_stream_receive(NetClientState *nc, const uint8_t *buf,
}
if (ret < (ssize_t)remaining) {
s->send_index += ret;
- net_stream_write_poll(s, true);
+ s->ioc_write_tag = qio_channel_add_watch(s->ioc, G_IO_OUT,
+ net_stream_writable, s, NULL);
return 0;
}
s->send_index = 0;
return size;
}
+static gboolean net_stream_send(QIOChannel *ioc,
+ GIOCondition condition,
+ gpointer data);
+
static void net_stream_send_completed(NetClientState *nc, ssize_t len)
{
NetStreamState *s = DO_UPCAST(NetStreamState, nc, nc);
- if (!s->read_poll) {
- net_stream_read_poll(s, true);
+ if (!s->ioc_read_tag) {
+ s->ioc_read_tag = qio_channel_add_watch(s->ioc, G_IO_IN,
+ net_stream_send, s, NULL);
}
}
@@ -130,19 +127,24 @@ static void net_stream_rs_finalize(SocketReadState *rs)
if (qemu_send_packet_async(&s->nc, rs->buf,
rs->packet_len,
net_stream_send_completed) == 0) {
- net_stream_read_poll(s, false);
+ if (s->ioc_read_tag) {
+ g_source_remove(s->ioc_read_tag);
+ s->ioc_read_tag = 0;
+ }
}
}
-static void net_stream_send(void *opaque)
+static gboolean net_stream_send(QIOChannel *ioc,
+ GIOCondition condition,
+ gpointer data)
{
- NetStreamState *s = opaque;
+ NetStreamState *s = data;
int size;
int ret;
- uint8_t buf1[NET_BUFSIZE];
- const uint8_t *buf;
+ char buf1[NET_BUFSIZE];
+ const char *buf;
- size = recv(s->fd, buf1, sizeof(buf1), 0);
+ size = qio_channel_read(s->ioc, buf1, sizeof(buf1), NULL);
if (size < 0) {
if (errno != EWOULDBLOCK) {
goto eoc;
@@ -150,52 +152,63 @@ static void net_stream_send(void *opaque)
} else if (size == 0) {
/* end of connection */
eoc:
- net_stream_read_poll(s, false);
- net_stream_write_poll(s, false);
- if (s->listen_fd != -1) {
- qemu_set_fd_handler(s->listen_fd, net_stream_accept, NULL, s);
+ s->ioc_read_tag = 0;
+ if (s->ioc_write_tag) {
+ g_source_remove(s->ioc_write_tag);
+ s->ioc_write_tag = 0;
}
- closesocket(s->fd);
+ if (s->listener) {
+ qio_net_listener_set_client_func(s->listener, net_stream_listen,
+ s, NULL);
+ }
+ object_unref(OBJECT(s->ioc));
+ s->ioc = NULL;
- s->fd = -1;
net_socket_rs_init(&s->rs, net_stream_rs_finalize, false);
s->nc.link_down = true;
memset(s->nc.info_str, 0, sizeof(s->nc.info_str));
- return;
+ return G_SOURCE_REMOVE;
}
buf = buf1;
- ret = net_fill_rstate(&s->rs, buf, size);
+ ret = net_fill_rstate(&s->rs, (const uint8_t *)buf, size);
if (ret == -1) {
goto eoc;
}
+
+ return G_SOURCE_CONTINUE;
}
static void net_stream_cleanup(NetClientState *nc)
{
NetStreamState *s = DO_UPCAST(NetStreamState, nc, nc);
- if (s->fd != -1) {
- net_stream_read_poll(s, false);
- net_stream_write_poll(s, false);
- close(s->fd);
- s->fd = -1;
+ if (s->ioc) {
+ if (QIO_CHANNEL_SOCKET(s->ioc)->fd != -1) {
+ if (s->ioc_read_tag) {
+ g_source_remove(s->ioc_read_tag);
+ s->ioc_read_tag = 0;
+ }
+ if (s->ioc_write_tag) {
+ g_source_remove(s->ioc_write_tag);
+ s->ioc_write_tag = 0;
+ }
+ }
+ object_unref(OBJECT(s->ioc));
+ s->ioc = NULL;
}
- if (s->listen_fd != -1) {
- qemu_set_fd_handler(s->listen_fd, NULL, NULL, NULL);
- closesocket(s->listen_fd);
- s->listen_fd = -1;
+ if (s->listen_ioc) {
+ if (s->listener) {
+ qio_net_listener_disconnect(s->listener);
+ object_unref(OBJECT(s->listener));
+ s->listener = NULL;
+ }
+ object_unref(OBJECT(s->listen_ioc));
+ s->listen_ioc = NULL;
}
}
-static void net_stream_connect(void *opaque)
-{
- NetStreamState *s = opaque;
- s->send_fn = net_stream_send;
- net_stream_read_poll(s, true);
-}
-
static NetClientInfo net_stream_info = {
.type = NET_CLIENT_DRIVER_STREAM,
.size = sizeof(NetStreamState),
@@ -203,77 +216,68 @@ static NetClientInfo net_stream_info = {
.cleanup = net_stream_cleanup,
};
-static NetStreamState *net_stream_fd_init_stream(NetClientState *peer,
- const char *model,
- const char *name,
- int fd, int is_connected)
+static void net_stream_listen(QIONetListener *listener,
+ QIOChannelSocket *cioc,
+ void *opaque)
{
- NetClientState *nc;
- NetStreamState *s;
-
- nc = qemu_new_net_client(&net_stream_info, peer, model, name);
+ NetStreamState *s = opaque;
+ SocketAddress *addr;
+ char *uri;
- snprintf(nc->info_str, sizeof(nc->info_str), "fd=%d", fd);
+ object_ref(OBJECT(cioc));
- s = DO_UPCAST(NetStreamState, nc, nc);
+ qio_net_listener_set_client_func(s->listener, NULL, s, NULL);
- s->fd = fd;
- s->listen_fd = -1;
- net_socket_rs_init(&s->rs, net_stream_rs_finalize, false);
+ s->ioc = QIO_CHANNEL(cioc);
+ qio_channel_set_name(s->ioc, "stream-server");
+ s->nc.link_down = false;
- /* Disable Nagle algorithm on TCP sockets to reduce latency */
- socket_set_nodelay(fd);
+ s->ioc_read_tag = qio_channel_add_watch(s->ioc, G_IO_IN, net_stream_send,
+ s, NULL);
- if (is_connected) {
- net_stream_connect(s);
+ if (cioc->localAddr.ss_family == AF_UNIX) {
+ addr = qio_channel_socket_get_local_address(cioc, NULL);
} else {
- qemu_set_fd_handler(s->fd, NULL, net_stream_connect, s);
+ addr = qio_channel_socket_get_remote_address(cioc, NULL);
}
- return s;
+ g_assert(addr != NULL);
+ uri = socket_uri(addr);
+ pstrcpy(s->nc.info_str, sizeof(s->nc.info_str), uri);
+ g_free(uri);
+ qapi_free_SocketAddress(addr);
+
}
-static void net_stream_accept(void *opaque)
+static void net_stream_server_listening(QIOTask *task, gpointer opaque)
{
NetStreamState *s = opaque;
- struct sockaddr_storage saddr;
- socklen_t len;
- int fd;
-
- for (;;) {
- len = sizeof(saddr);
- fd = qemu_accept(s->listen_fd, (struct sockaddr *)&saddr, &len);
- if (fd < 0 && errno != EINTR) {
- return;
- } else if (fd >= 0) {
- qemu_set_fd_handler(s->listen_fd, NULL, NULL, NULL);
- break;
- }
- }
-
- s->fd = fd;
- s->nc.link_down = false;
- net_stream_connect(s);
- switch (saddr.ss_family) {
- case AF_INET: {
- struct sockaddr_in *saddr_in = (struct sockaddr_in *)&saddr;
+ QIOChannelSocket *listen_sioc = QIO_CHANNEL_SOCKET(s->listen_ioc);
+ SocketAddress *addr;
+ int ret;
- snprintf(s->nc.info_str, sizeof(s->nc.info_str),
- "connection from %s:%d",
- inet_ntoa(saddr_in->sin_addr), ntohs(saddr_in->sin_port));
- break;
+ if (listen_sioc->fd < 0) {
+ snprintf(s->nc.info_str, sizeof(s->nc.info_str), "connection error");
+ return;
}
- case AF_UNIX: {
- struct sockaddr_un saddr_un;
- len = sizeof(saddr_un);
- getsockname(s->listen_fd, (struct sockaddr *)&saddr_un, &len);
+ addr = qio_channel_socket_get_local_address(listen_sioc, NULL);
+ g_assert(addr != NULL);
+ ret = qemu_socket_try_set_nonblock(listen_sioc->fd);
+ if (addr->type == SOCKET_ADDRESS_TYPE_FD && ret < 0) {
snprintf(s->nc.info_str, sizeof(s->nc.info_str),
- "connect from %s", saddr_un.sun_path);
- break;
- }
- default:
- g_assert_not_reached();
+ "can't use file descriptor %s (errno %d)",
+ addr->u.fd.str, -ret);
+ return;
}
+ g_assert(ret == 0);
+ qapi_free_SocketAddress(addr);
+
+ s->nc.link_down = true;
+ s->listener = qio_net_listener_new();
+
+ net_socket_rs_init(&s->rs, net_stream_rs_finalize, false);
+ qio_net_listener_set_client_func(s->listener, net_stream_listen, s, NULL);
+ qio_net_listener_add(s->listener, listen_sioc);
}
static int net_stream_server_init(NetClientState *peer,
@@ -284,105 +288,55 @@ static int net_stream_server_init(NetClientState *peer,
{
NetClientState *nc;
NetStreamState *s;
- int fd, ret;
+ QIOChannelSocket *listen_sioc = qio_channel_socket_new();
- switch (addr->type) {
- case SOCKET_ADDRESS_TYPE_INET: {
- struct sockaddr_in saddr_in;
+ nc = qemu_new_net_client(&net_stream_info, peer, model, name);
+ s = DO_UPCAST(NetStreamState, nc, nc);
- if (convert_host_port(&saddr_in, addr->u.inet.host, addr->u.inet.port,
- errp) < 0) {
- return -1;
- }
+ s->listen_ioc = QIO_CHANNEL(listen_sioc);
+ qio_channel_socket_listen_async(listen_sioc, addr, 0,
+ net_stream_server_listening, s,
+ NULL, NULL);
- fd = qemu_socket(PF_INET, SOCK_STREAM, 0);
- if (fd < 0) {
- error_setg_errno(errp, errno, "can't create stream socket");
- return -1;
- }
- qemu_socket_set_nonblock(fd);
+ return 0;
+}
- socket_set_fast_reuse(fd);
+static void net_stream_client_connected(QIOTask *task, gpointer opaque)
+{
+ NetStreamState *s = opaque;
+ QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(s->ioc);
+ SocketAddress *addr;
+ gchar *uri;
+ int ret;
- ret = bind(fd, (struct sockaddr *)&saddr_in, sizeof(saddr_in));
- if (ret < 0) {
- error_setg_errno(errp, errno, "can't bind ip=%s to socket",
- inet_ntoa(saddr_in.sin_addr));
- closesocket(fd);
- return -1;
- }
- break;
+ if (sioc->fd < 0) {
+ snprintf(s->nc.info_str, sizeof(s->nc.info_str), "connection error");
+ return;
}
- case SOCKET_ADDRESS_TYPE_UNIX: {
- struct sockaddr_un saddr_un;
-
- ret = unlink(addr->u.q_unix.path);
- if (ret < 0 && errno != ENOENT) {
- error_setg_errno(errp, errno, "failed to unlink socket %s",
- addr->u.q_unix.path);
- return -1;
- }
-
- saddr_un.sun_family = PF_UNIX;
- ret = snprintf(saddr_un.sun_path, sizeof(saddr_un.sun_path), "%s",
- addr->u.q_unix.path);
- if (ret < 0 || ret >= sizeof(saddr_un.sun_path)) {
- error_setg(errp, "UNIX socket path '%s' is too long",
- addr->u.q_unix.path);
- error_append_hint(errp, "Path must be less than %zu bytes\n",
- sizeof(saddr_un.sun_path));
- return -1;
- }
- fd = qemu_socket(PF_UNIX, SOCK_STREAM, 0);
- if (fd < 0) {
- error_setg_errno(errp, errno, "can't create stream socket");
- return -1;
- }
- qemu_socket_set_nonblock(fd);
-
- ret = bind(fd, (struct sockaddr *)&saddr_un, sizeof(saddr_un));
- if (ret < 0) {
- error_setg_errno(errp, errno, "can't create socket with path: %s",
- saddr_un.sun_path);
- closesocket(fd);
- return -1;
- }
- break;
- }
- case SOCKET_ADDRESS_TYPE_FD:
- fd = monitor_fd_param(monitor_cur(), addr->u.fd.str, errp);
- if (fd == -1) {
- return -1;
- }
- ret = qemu_socket_try_set_nonblock(fd);
- if (ret < 0) {
- error_setg_errno(errp, -ret, "%s: Can't use file descriptor %d",
- name, fd);
- return -1;
- }
- break;
- default:
- error_setg(errp, "only support inet or fd type");
- return -1;
- }
+ addr = qio_channel_socket_get_remote_address(sioc, NULL);
+ g_assert(addr != NULL);
+ uri = socket_uri(addr);
+ pstrcpy(s->nc.info_str, sizeof(s->nc.info_str), uri);
+ g_free(uri);
- ret = listen(fd, 0);
- if (ret < 0) {
- error_setg_errno(errp, errno, "can't listen on socket");
- closesocket(fd);
- return -1;
+ ret = qemu_socket_try_set_nonblock(sioc->fd);
+ if (addr->type == SOCKET_ADDRESS_TYPE_FD && ret < 0) {
+ snprintf(s->nc.info_str, sizeof(s->nc.info_str),
+ "can't use file descriptor %s (errno %d)",
+ addr->u.fd.str, -ret);
+ return;
}
+ g_assert(ret == 0);
+ qapi_free_SocketAddress(addr);
- nc = qemu_new_net_client(&net_stream_info, peer, model, name);
- s = DO_UPCAST(NetStreamState, nc, nc);
- s->fd = -1;
- s->listen_fd = fd;
- s->nc.link_down = true;
net_socket_rs_init(&s->rs, net_stream_rs_finalize, false);
- qemu_set_fd_handler(s->listen_fd, net_stream_accept, NULL, s);
- return 0;
+ /* Disable Nagle algorithm on TCP sockets to reduce latency */
+ qio_channel_set_delay(s->ioc, false);
+
+ s->ioc_read_tag = qio_channel_add_watch(s->ioc, G_IO_IN, net_stream_send,
+ s, NULL);
}
static int net_stream_client_init(NetClientState *peer,
@@ -392,115 +346,17 @@ static int net_stream_client_init(NetClientState *peer,
Error **errp)
{
NetStreamState *s;
- int fd, connected, ret;
- gchar *info_str;
-
- switch (addr->type) {
- case SOCKET_ADDRESS_TYPE_INET: {
- struct sockaddr_in saddr_in;
-
- if (convert_host_port(&saddr_in, addr->u.inet.host, addr->u.inet.port,
- errp) < 0) {
- return -1;
- }
-
- fd = qemu_socket(PF_INET, SOCK_STREAM, 0);
- if (fd < 0) {
- error_setg_errno(errp, errno, "can't create stream socket");
- return -1;
- }
- qemu_socket_set_nonblock(fd);
-
- connected = 0;
- for (;;) {
- ret = connect(fd, (struct sockaddr *)&saddr_in, sizeof(saddr_in));
- if (ret < 0) {
- if (errno == EINTR || errno == EWOULDBLOCK) {
- /* continue */
- } else if (errno == EINPROGRESS ||
- errno == EALREADY) {
- break;
- } else {
- error_setg_errno(errp, errno, "can't connect socket");
- closesocket(fd);
- return -1;
- }
- } else {
- connected = 1;
- break;
- }
- }
- info_str = g_strdup_printf("connect to %s:%d",
- inet_ntoa(saddr_in.sin_addr),
- ntohs(saddr_in.sin_port));
- break;
- }
- case SOCKET_ADDRESS_TYPE_UNIX: {
- struct sockaddr_un saddr_un;
-
- saddr_un.sun_family = PF_UNIX;
- ret = snprintf(saddr_un.sun_path, sizeof(saddr_un.sun_path), "%s",
- addr->u.q_unix.path);
- if (ret < 0 || ret >= sizeof(saddr_un.sun_path)) {
- error_setg(errp, "UNIX socket path '%s' is too long",
- addr->u.q_unix.path);
- error_append_hint(errp, "Path must be less than %zu bytes\n",
- sizeof(saddr_un.sun_path));
- return -1;
- }
+ NetClientState *nc;
+ QIOChannelSocket *sioc = qio_channel_socket_new();
- fd = qemu_socket(PF_UNIX, SOCK_STREAM, 0);
- if (fd < 0) {
- error_setg_errno(errp, errno, "can't create stream socket");
- return -1;
- }
- qemu_socket_set_nonblock(fd);
-
- connected = 0;
- for (;;) {
- ret = connect(fd, (struct sockaddr *)&saddr_un, sizeof(saddr_un));
- if (ret < 0) {
- if (errno == EINTR || errno == EWOULDBLOCK) {
- /* continue */
- } else if (errno == EAGAIN ||
- errno == EALREADY) {
- break;
- } else {
- error_setg_errno(errp, errno, "can't connect socket");
- closesocket(fd);
- return -1;
- }
- } else {
- connected = 1;
- break;
- }
- }
- info_str = g_strdup_printf(" connect to %s", saddr_un.sun_path);
- break;
- }
- case SOCKET_ADDRESS_TYPE_FD:
- fd = monitor_fd_param(monitor_cur(), addr->u.fd.str, errp);
- if (fd == -1) {
- return -1;
- }
- ret = qemu_socket_try_set_nonblock(fd);
- if (ret < 0) {
- error_setg_errno(errp, -ret, "%s: Can't use file descriptor %d",
- name, fd);
- return -1;
- }
- connected = 1;
- info_str = g_strdup_printf("connect to fd %d", fd);
- break;
- default:
- error_setg(errp, "only support inet, unix or fd type");
- return -1;
- }
+ nc = qemu_new_net_client(&net_stream_info, peer, model, name);
+ s = DO_UPCAST(NetStreamState, nc, nc);
- s = net_stream_fd_init_stream(peer, model, name, fd, connected);
+ s->ioc = QIO_CHANNEL(sioc);
- pstrcpy(s->nc.info_str, sizeof(s->nc.info_str), info_str);
- g_free(info_str);
+ qio_channel_socket_connect_async(sioc, addr,
+ net_stream_client_connected, s,
+ NULL, NULL);
return 0;
}
diff --git a/qemu-options.hx b/qemu-options.hx
index ee2436ae14a7..a0b5b70c80cb 100644
--- a/qemu-options.hx
+++ b/qemu-options.hx
@@ -2732,8 +2732,8 @@ DEF("netdev", HAS_ARG, QEMU_OPTION_netdev,
"-netdev socket,id=str[,fd=h][,udp=host:port][,localaddr=host:port]\n"
" configure a network backend to connect to another network\n"
" using an UDP tunnel\n"
- "-netdev stream,id=str[,server=on|off],addr.type=inet,addr.host=host,addr.port=port\n"
- "-netdev stream,id=str[,server=on|off],addr.type=unix,addr.path=path\n"
+ "-netdev stream,id=str[,server=on|off],addr.type=inet,addr.host=host,addr.port=port[,to=maxport][,numeric=on|off][,keep-alive=on|off][,mptcp=on|off][,addr.ipv4=on|off][,addr.ipv6=on|off]\n"
+ "-netdev stream,id=str[,server=on|off],addr.type=unix,addr.path=path[,abstract=on|off][,tight=on|off]\n"
"-netdev stream,id=str[,server=on|off],addr.type=fd,addr.str=h\n"
" configure a network backend to connect to another network\n"
" using a socket connection in stream mode.\n"
--
2.37.3
^ permalink raw reply related [flat|nested] 31+ messages in thread
* [PATCH v8 14/14] tests/qtest: netdev: test stream and dgram backends
2022-09-13 6:39 [PATCH v8 00/14] qapi: net: add unix socket type support to netdev backend Laurent Vivier
` (12 preceding siblings ...)
2022-09-13 6:39 ` [PATCH v8 13/14] net: stream: move to QIO Laurent Vivier
@ 2022-09-13 6:40 ` Laurent Vivier
2022-09-13 10:24 ` [PATCH v8 00/14] qapi: net: add unix socket type support to netdev backend Stefano Brivio
14 siblings, 0 replies; 31+ messages in thread
From: Laurent Vivier @ 2022-09-13 6:40 UTC (permalink / raw)
To: qemu-devel
Cc: Jason Wang, Paolo Bonzini, Gregory Kurz, Daniel P. Berrangé,
Laurent Vivier, Eric Blake, Markus Armbruster, Thomas Huth,
David Gibson, Dr. David Alan Gilbert
Signed-off-by: Laurent Vivier <lvivier@redhat.com>
---
tests/qtest/meson.build | 1 +
tests/qtest/netdev-socket.c | 391 ++++++++++++++++++++++++++++++++++++
2 files changed, 392 insertions(+)
create mode 100644 tests/qtest/netdev-socket.c
diff --git a/tests/qtest/meson.build b/tests/qtest/meson.build
index e910cb32ca15..38ee8b7a2d56 100644
--- a/tests/qtest/meson.build
+++ b/tests/qtest/meson.build
@@ -27,6 +27,7 @@ qtests_generic = [
'test-hmp',
'qos-test',
'readconfig-test',
+ 'netdev-socket',
]
if config_host.has_key('CONFIG_MODULES')
qtests_generic += [ 'modules-test' ]
diff --git a/tests/qtest/netdev-socket.c b/tests/qtest/netdev-socket.c
new file mode 100644
index 000000000000..55e0c07f18ec
--- /dev/null
+++ b/tests/qtest/netdev-socket.c
@@ -0,0 +1,391 @@
+/*
+ * QTest testcase for netdev stream and dgram
+ *
+ * Copyright (c) 2022 Red Hat, Inc.
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#include "qemu/osdep.h"
+#include <glib.h>
+#include "libqtest.h"
+
+#define CONNECTION_TIMEOUT 5
+
+#define EXPECT_STATE(q, e, t) \
+do { \
+ char *resp = qtest_hmp(q, "info network"); \
+ if (t) { \
+ strrchr(resp, t)[0] = 0; \
+ } \
+ g_test_timer_start(); \
+ while (g_test_timer_elapsed() < CONNECTION_TIMEOUT) { \
+ if (strcmp(resp, e) == 0) { \
+ break; \
+ } \
+ g_free(resp); \
+ resp = qtest_hmp(q, "info network"); \
+ if (t) { \
+ strrchr(resp, t)[0] = 0; \
+ } \
+ } \
+ g_assert_cmpstr(resp, ==, e); \
+ g_free(resp); \
+} while (0)
+
+static int inet_get_free_port(void)
+{
+ int sock;
+ struct sockaddr_in addr;
+ socklen_t len;
+ int port;
+
+ sock = socket(AF_INET, SOCK_STREAM, 0);
+ if (sock < 0) {
+ return -1;
+ }
+
+ memset(&addr, 0, sizeof(addr));
+ addr.sin_family = AF_INET;
+ addr.sin_addr.s_addr = INADDR_ANY;
+ addr.sin_port = 0;
+ if (bind(sock, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
+ return -1;
+ }
+
+ len = sizeof(addr);
+ if (getsockname(sock, (struct sockaddr *)&addr, &len) < 0) {
+ return -1;
+ }
+
+ port = ntohs(addr.sin_port);
+
+ close(sock);
+
+ return port;
+}
+
+static void test_stream_inet_ipv4(void)
+{
+ QTestState *qts0, *qts1;
+ char *expect;
+ int port;
+
+ port = inet_get_free_port();
+ qts0 = qtest_initf("-nodefaults "
+ "-netdev stream,id=st0,addr.type=inet,"
+ "addr.ipv4=on,addr.ipv6=off,"
+ "addr.host=localhost,addr.port=%d", port);
+
+ EXPECT_STATE(qts0, "st0: index=0,type=stream,\r\n", 0);
+
+ qts1 = qtest_initf("-nodefaults "
+ "-netdev stream,server=false,id=st0,addr.type=inet,"
+ "addr.ipv4=on,addr.ipv6=off,"
+ "addr.host=localhost,addr.port=%d", port);
+
+ expect = g_strdup_printf("st0: index=0,type=stream,tcp:127.0.0.1:%d\r\n",
+ port);
+ EXPECT_STATE(qts1, expect, 0);
+ g_free(expect);
+
+ /* the port is unknown, check only the address */
+ EXPECT_STATE(qts0, "st0: index=0,type=stream,tcp:127.0.0.1", ':');
+
+ qtest_quit(qts1);
+ qtest_quit(qts0);
+}
+
+static void test_stream_inet_ipv6(void)
+{
+ QTestState *qts0, *qts1;
+ char *expect;
+ int port;
+
+ port = inet_get_free_port();
+ qts0 = qtest_initf("-nodefaults "
+ "-netdev stream,id=st0,addr.type=inet,"
+ "addr.ipv4=off,addr.ipv6=on,"
+ "addr.host=localhost,addr.port=%d", port);
+
+ EXPECT_STATE(qts0, "st0: index=0,type=stream,\r\n", 0);
+
+ qts1 = qtest_initf("-nodefaults "
+ "-netdev stream,server=false,id=st0,addr.type=inet,"
+ "addr.ipv4=off,addr.ipv6=on,"
+ "addr.host=localhost,addr.port=%d", port);
+
+ expect = g_strdup_printf("st0: index=0,type=stream,tcp:::1:%d\r\n",
+ port);
+ EXPECT_STATE(qts1, expect, 0);
+ g_free(expect);
+
+ /* the port is unknown, check only the address */
+ EXPECT_STATE(qts0, "st0: index=0,type=stream,tcp:::1", ':');
+
+ qtest_quit(qts1);
+ qtest_quit(qts0);
+}
+
+static void test_stream_unix(void)
+{
+ QTestState *qts0, *qts1;
+ char *expect;
+ gchar *path;
+ int ret;
+
+ ret = g_file_open_tmp("netdev-XXXXXX", &path, NULL);
+ g_assert_true(ret >= 0);
+ close(ret);
+
+ qts0 = qtest_initf("-nodefaults "
+ "-netdev stream,id=st0,addr.type=unix,addr.path=%s,",
+ path);
+
+ EXPECT_STATE(qts0, "st0: index=0,type=stream,\r\n", 0);
+
+ qts1 = qtest_initf("-nodefaults "
+ "-netdev stream,id=st0,server=false,"
+ "addr.type=unix,addr.path=%s",
+ path);
+
+ expect = g_strdup_printf("st0: index=0,type=stream,unix:%s\r\n", path);
+ EXPECT_STATE(qts1, expect, 0);
+ EXPECT_STATE(qts0, expect, 0);
+ g_free(expect);
+ g_free(path);
+
+ qtest_quit(qts1);
+ qtest_quit(qts0);
+}
+
+static void test_stream_unix_abstract(void)
+{
+ QTestState *qts0, *qts1;
+ char *expect;
+ gchar *path;
+ int ret;
+
+ ret = g_file_open_tmp("netdev-XXXXXX", &path, NULL);
+ g_assert_true(ret >= 0);
+ close(ret);
+
+ qts0 = qtest_initf("-nodefaults "
+ "-netdev stream,id=st0,addr.type=unix,addr.path=%s,"
+ "addr.abstract=on",
+ path);
+
+ EXPECT_STATE(qts0, "st0: index=0,type=stream,\r\n", 0);
+
+ qts1 = qtest_initf("-nodefaults "
+ "-netdev stream,id=st0,server=false,"
+ "addr.type=unix,addr.path=%s,addr.abstract=on",
+ path);
+
+ expect = g_strdup_printf("st0: index=0,type=stream,unix:%s\r\n", path);
+ EXPECT_STATE(qts1, expect, 0);
+ EXPECT_STATE(qts0, expect, 0);
+ g_free(expect);
+ g_free(path);
+
+ qtest_quit(qts1);
+ qtest_quit(qts0);
+}
+
+static void test_stream_fd(void)
+{
+ QTestState *qts0, *qts1;
+ char *expect;
+ int ret, sock0, sock1;
+ struct sockaddr_un addr;
+ gchar *path;
+
+ ret = g_file_open_tmp("netdev-XXXXXX", &path, NULL);
+ g_assert_true(ret >= 0);
+ close(ret);
+ addr.sun_family = AF_UNIX;
+ strcpy(addr.sun_path, path);
+
+ unlink(addr.sun_path);
+ sock0 = socket(AF_LOCAL, SOCK_STREAM, 0);
+ g_assert_cmpint(sock0, !=, -1);
+
+ ret = bind(sock0, (struct sockaddr *)&addr, sizeof(addr));
+ g_assert_cmpint(ret, !=, -1);
+
+ qts0 = qtest_initf("-nodefaults "
+ "-netdev stream,id=st0,addr.type=fd,addr.str=%d",
+ sock0);
+
+ EXPECT_STATE(qts0, "st0: index=0,type=stream,\r\n", 0);
+
+ sock1 = socket(AF_LOCAL, SOCK_STREAM, 0);
+ g_assert_cmpint(sock1, !=, -1);
+
+ ret = connect(sock1, (struct sockaddr *)&addr, sizeof(addr));
+ g_assert_cmpint(ret, !=, -1);
+
+ qts1 = qtest_initf("-nodefaults "
+ "-netdev stream,id=st0,server=off,addr.type=fd,addr.str=%d",
+ sock1);
+
+
+ expect = g_strdup_printf("st0: index=0,type=stream,unix:%s\r\n", path);
+ EXPECT_STATE(qts1, expect, 0);
+ EXPECT_STATE(qts0, expect, 0);
+ g_free(expect);
+
+ qtest_quit(qts1);
+ qtest_quit(qts0);
+
+ closesocket(sock0);
+ closesocket(sock1);
+
+ g_free(path);
+}
+
+static void test_dgram_inet(void)
+{
+ QTestState *qts0, *qts1;
+ char *expect;
+ int port0, port1;
+
+ port0 = inet_get_free_port();
+ port1 = inet_get_free_port();
+
+ qts0 = qtest_initf("-nodefaults "
+ "-netdev dgram,id=st0,"
+ "local.type=inet,local.host=localhost,local.port=%d,"
+ "remote.type=inet,remote.host=localhost,remote.port=%d",
+ port0, port1);
+
+ expect = g_strdup_printf("st0: index=0,type=dgram,"
+ "udp=127.0.0.1:%d/127.0.0.1:%d\r\n", port0, port1);
+ EXPECT_STATE(qts0, expect, 0);
+ g_free(expect);
+
+ qts1 = qtest_initf("-nodefaults "
+ "-netdev dgram,id=st0,"
+ "local.type=inet,local.host=localhost,local.port=%d,"
+ "remote.type=inet,remote.host=localhost,remote.port=%d",
+ port1, port0);
+
+ expect = g_strdup_printf("st0: index=0,type=dgram,"
+ "udp=127.0.0.1:%d/127.0.0.1:%d\r\n", port1, port0);
+ EXPECT_STATE(qts1, expect, 0);
+ g_free(expect);
+
+ qtest_quit(qts1);
+ qtest_quit(qts0);
+}
+
+static void test_dgram_mcast(void)
+{
+ QTestState *qts;
+
+ qts = qtest_initf("-nodefaults "
+ "-netdev dgram,id=st0,"
+ "remote.type=inet,remote.host=230.0.0.1,remote.port=1234");
+
+ EXPECT_STATE(qts, "st0: index=0,type=dgram,mcast=230.0.0.1:1234\r\n", 0);
+
+ qtest_quit(qts);
+}
+
+static void test_dgram_unix(void)
+{
+ QTestState *qts0, *qts1;
+ char *expect;
+ gchar *path0, *path1;
+ int ret;
+
+ ret = g_file_open_tmp("netdev-XXXXXX", &path0, NULL);
+ g_assert_true(ret >= 0);
+ close(ret);
+
+ ret = g_file_open_tmp("netdev-XXXXXX", &path1, NULL);
+ g_assert_true(ret >= 0);
+ close(ret);
+
+ qts0 = qtest_initf("-nodefaults "
+ "-netdev dgram,id=st0,local.type=unix,local.path=%s,"
+ "remote.type=unix,remote.path=%s",
+ path0, path1);
+
+ expect = g_strdup_printf("st0: index=0,type=dgram,udp=%s:%s\r\n",
+ path0, path1);
+ EXPECT_STATE(qts0, expect, 0);
+ g_free(expect);
+
+ qts1 = qtest_initf("-nodefaults "
+ "-netdev dgram,id=st0,local.type=unix,local.path=%s,"
+ "remote.type=unix,remote.path=%s",
+ path1, path0);
+
+
+ expect = g_strdup_printf("st0: index=0,type=dgram,udp=%s:%s\r\n",
+ path1, path0);
+ EXPECT_STATE(qts1, expect, 0);
+ g_free(expect);
+
+ g_free(path0);
+ g_free(path1);
+
+ qtest_quit(qts1);
+ qtest_quit(qts0);
+}
+
+static void test_dgram_fd(void)
+{
+ QTestState *qts0, *qts1;
+ char *expect;
+ int ret;
+ int sv[2];
+
+ ret = socketpair(PF_UNIX, SOCK_DGRAM, 0, sv);
+ g_assert_cmpint(ret, !=, -1);
+
+ qts0 = qtest_initf("-nodefaults "
+ "-netdev dgram,id=st0,local.type=fd,local.str=%d",
+ sv[0]);
+
+ expect = g_strdup_printf("st0: index=0,type=dgram,fd=%d unix\r\n", sv[0]);
+ EXPECT_STATE(qts0, expect, 0);
+ g_free(expect);
+
+ qts1 = qtest_initf("-nodefaults "
+ "-netdev dgram,id=st0,local.type=fd,local.str=%d",
+ sv[1]);
+
+
+ expect = g_strdup_printf("st0: index=0,type=dgram,fd=%d unix\r\n", sv[1]);
+ EXPECT_STATE(qts1, expect, 0);
+ g_free(expect);
+
+ qtest_quit(qts1);
+ qtest_quit(qts0);
+
+ close(sv[0]);
+ close(sv[1]);
+}
+
+int main(int argc, char **argv)
+{
+ int ret;
+
+ g_test_init(&argc, &argv, NULL);
+
+ qtest_add_func("/netdev/stream/inet/ipv4", test_stream_inet_ipv4);
+ qtest_add_func("/netdev/stream/inet/ipv6", test_stream_inet_ipv6);
+ qtest_add_func("/netdev/stream/unix", test_stream_unix);
+ qtest_add_func("/netdev/stream/unix/abstract", test_stream_unix_abstract);
+ qtest_add_func("/netdev/stream/fd", test_stream_fd);
+ qtest_add_func("/netdev/dgram/inet", test_dgram_inet);
+ qtest_add_func("/netdev/dgram/mcast", test_dgram_mcast);
+ qtest_add_func("/netdev/dgram/unix", test_dgram_unix);
+ qtest_add_func("/netdev/dgram/fd", test_dgram_fd);
+
+ ret = g_test_run();
+
+ return ret;
+}
--
2.37.3
^ permalink raw reply related [flat|nested] 31+ messages in thread
* Re: [PATCH v8 00/14] qapi: net: add unix socket type support to netdev backend
2022-09-13 6:39 [PATCH v8 00/14] qapi: net: add unix socket type support to netdev backend Laurent Vivier
` (13 preceding siblings ...)
2022-09-13 6:40 ` [PATCH v8 14/14] tests/qtest: netdev: test stream and dgram backends Laurent Vivier
@ 2022-09-13 10:24 ` Stefano Brivio
14 siblings, 0 replies; 31+ messages in thread
From: Stefano Brivio @ 2022-09-13 10:24 UTC (permalink / raw)
To: Laurent Vivier
Cc: qemu-devel, Jason Wang, Paolo Bonzini, Gregory Kurz,
Daniel P. Berrangé,
Eric Blake, Markus Armbruster, Thomas Huth, David Gibson,
Dr. David Alan Gilbert, Ralph Schmieder
On Tue, 13 Sep 2022 08:39:46 +0200
Laurent Vivier <lvivier@redhat.com> wrote:
> "-netdev socket" only supports inet sockets.
>
> It's not a complex task to add support for unix sockets, but
> the socket netdev parameters are not defined to manage well unix
> socket parameters.
>
> As discussed in:
>
> "socket.c added support for unix domain socket datagram transport"
> https://lore.kernel.org/qemu-devel/1C0E1BC5-904F-46B0-8044-68E43E67BE60@gmail.com/
>
> This series adds support of unix socket type using SocketAddress QAPI structure.
>
> Two new netdev backends, "stream" and "dgram" are added, that are barely a copy of "socket"
> backend but they use the SocketAddress QAPI to provide socket parameters.
> And then they also implement unix sockets (TCP and UDP).
For the series,
Tested-by: Stefano Brivio <sbrivio@redhat.com>
...specifically, same as v7, the stream-oriented AF_UNIX support, with
passt (https://passt.top) and its test suite, running qemu (x86_64 KVM,
and armv6l, armv7l, aarch64, ppc64, ppc64le, s390x TCG) with something
on the lines of:
-device virtio-net-pci,netdev=socket0 -netdev stream,id=socket0,server=off,addr.type=unix,addr.path=...
--
Stefano
^ permalink raw reply [flat|nested] 31+ messages in thread
* Re: [PATCH v8 01/14] net: introduce convert_host_port()
2022-09-13 6:39 ` [PATCH v8 01/14] net: introduce convert_host_port() Laurent Vivier
@ 2022-09-14 2:26 ` David Gibson
0 siblings, 0 replies; 31+ messages in thread
From: David Gibson @ 2022-09-14 2:26 UTC (permalink / raw)
To: Laurent Vivier
Cc: qemu-devel, Jason Wang, Paolo Bonzini, Gregory Kurz,
Daniel P. Berrangé,
Eric Blake, Markus Armbruster, Thomas Huth,
Dr. David Alan Gilbert, Stefano Brivio
[-- Attachment #1: Type: text/plain, Size: 4541 bytes --]
On Tue, Sep 13, 2022 at 08:39:47AM +0200, Laurent Vivier wrote:
> Signed-off-by: Laurent Vivier <lvivier@redhat.com>
> Reviewed-by: Stefano Brivio <sbrivio@redhat.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Although, if you do respin, an actual commit message would be nice to
have.
> ---
> include/qemu/sockets.h | 2 ++
> net/net.c | 62 ++++++++++++++++++++++--------------------
> 2 files changed, 34 insertions(+), 30 deletions(-)
>
> diff --git a/include/qemu/sockets.h b/include/qemu/sockets.h
> index 038faa157f59..47194b9732f8 100644
> --- a/include/qemu/sockets.h
> +++ b/include/qemu/sockets.h
> @@ -47,6 +47,8 @@ void socket_listen_cleanup(int fd, Error **errp);
> int socket_dgram(SocketAddress *remote, SocketAddress *local, Error **errp);
>
> /* Old, ipv4 only bits. Don't use for new code. */
> +int convert_host_port(struct sockaddr_in *saddr, const char *host,
> + const char *port, Error **errp);
> int parse_host_port(struct sockaddr_in *saddr, const char *str,
> Error **errp);
> int socket_init(void);
> diff --git a/net/net.c b/net/net.c
> index 2db160e0634d..d2288bd3a929 100644
> --- a/net/net.c
> +++ b/net/net.c
> @@ -66,55 +66,57 @@ static QTAILQ_HEAD(, NetClientState) net_clients;
> /***********************************************************/
> /* network device redirectors */
>
> -int parse_host_port(struct sockaddr_in *saddr, const char *str,
> - Error **errp)
> +int convert_host_port(struct sockaddr_in *saddr, const char *host,
> + const char *port, Error **errp)
> {
> - gchar **substrings;
> struct hostent *he;
> - const char *addr, *p, *r;
> - int port, ret = 0;
> + const char *r;
> + long p;
>
> memset(saddr, 0, sizeof(*saddr));
>
> - substrings = g_strsplit(str, ":", 2);
> - if (!substrings || !substrings[0] || !substrings[1]) {
> - error_setg(errp, "host address '%s' doesn't contain ':' "
> - "separating host from port", str);
> - ret = -1;
> - goto out;
> - }
> -
> - addr = substrings[0];
> - p = substrings[1];
> -
> saddr->sin_family = AF_INET;
> - if (addr[0] == '\0') {
> + if (host[0] == '\0') {
> saddr->sin_addr.s_addr = 0;
> } else {
> - if (qemu_isdigit(addr[0])) {
> - if (!inet_aton(addr, &saddr->sin_addr)) {
> + if (qemu_isdigit(host[0])) {
> + if (!inet_aton(host, &saddr->sin_addr)) {
> error_setg(errp, "host address '%s' is not a valid "
> - "IPv4 address", addr);
> - ret = -1;
> - goto out;
> + "IPv4 address", host);
> + return -1;
> }
> } else {
> - he = gethostbyname(addr);
> + he = gethostbyname(host);
> if (he == NULL) {
> - error_setg(errp, "can't resolve host address '%s'", addr);
> - ret = -1;
> - goto out;
> + error_setg(errp, "can't resolve host address '%s'", host);
> + return -1;
> }
> saddr->sin_addr = *(struct in_addr *)he->h_addr;
> }
> }
> - port = strtol(p, (char **)&r, 0);
> - if (r == p) {
> - error_setg(errp, "port number '%s' is invalid", p);
> + if (qemu_strtol(port, &r, 0, &p) != 0) {
> + error_setg(errp, "port number '%s' is invalid", port);
> + return -1;
> + }
> + saddr->sin_port = htons(p);
> + return 0;
> +}
> +
> +int parse_host_port(struct sockaddr_in *saddr, const char *str,
> + Error **errp)
> +{
> + gchar **substrings;
> + int ret;
> +
> + substrings = g_strsplit(str, ":", 2);
> + if (!substrings || !substrings[0] || !substrings[1]) {
> + error_setg(errp, "host address '%s' doesn't contain ':' "
> + "separating host from port", str);
> ret = -1;
> goto out;
> }
> - saddr->sin_port = htons(port);
> +
> + ret = convert_host_port(saddr, substrings[0], substrings[1], errp);
>
> out:
> g_strfreev(substrings);
--
David Gibson | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_
| _way_ _around_!
http://www.ozlabs.org/~dgibson
[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 833 bytes --]
^ permalink raw reply [flat|nested] 31+ messages in thread
* Re: [PATCH v8 02/14] net: remove the @errp argument of net_client_inits()
2022-09-13 6:39 ` [PATCH v8 02/14] net: remove the @errp argument of net_client_inits() Laurent Vivier
@ 2022-09-14 2:28 ` David Gibson
0 siblings, 0 replies; 31+ messages in thread
From: David Gibson @ 2022-09-14 2:28 UTC (permalink / raw)
To: Laurent Vivier
Cc: qemu-devel, Jason Wang, Paolo Bonzini, Gregory Kurz,
Daniel P. Berrangé,
Eric Blake, Markus Armbruster, Thomas Huth,
Dr. David Alan Gilbert
[-- Attachment #1: Type: text/plain, Size: 3002 bytes --]
On Tue, Sep 13, 2022 at 08:39:48AM +0200, Laurent Vivier wrote:
> The only caller passes &error_fatal, so use this directly in the function.
>
> It's what we do for -blockdev, -device, and -object.
>
> Suggested-by: Markus Armbruster <armbru@redhat.com>
> Signed-off-by: Laurent Vivier <lvivier@redhat.com>
> Reviewed-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
> ---
> include/net/net.h | 2 +-
> net/net.c | 20 +++++++-------------
> softmmu/vl.c | 2 +-
> 3 files changed, 9 insertions(+), 15 deletions(-)
>
> diff --git a/include/net/net.h b/include/net/net.h
> index 81d0b21defce..c1c34a58f849 100644
> --- a/include/net/net.h
> +++ b/include/net/net.h
> @@ -222,7 +222,7 @@ extern const char *host_net_devices[];
> /* from net.c */
> int net_client_parse(QemuOptsList *opts_list, const char *str);
> void show_netdevs(void);
> -int net_init_clients(Error **errp);
> +void net_init_clients(void);
> void net_check_clients(void);
> void net_cleanup(void);
> void hmp_host_net_add(Monitor *mon, const QDict *qdict);
> diff --git a/net/net.c b/net/net.c
> index d2288bd3a929..15958f881776 100644
> --- a/net/net.c
> +++ b/net/net.c
> @@ -1562,27 +1562,21 @@ out:
> return ret;
> }
>
> -int net_init_clients(Error **errp)
> +void net_init_clients(void)
> {
> net_change_state_entry =
> qemu_add_vm_change_state_handler(net_vm_change_state_handler, NULL);
>
> QTAILQ_INIT(&net_clients);
>
> - if (qemu_opts_foreach(qemu_find_opts("netdev"),
> - net_init_netdev, NULL, errp)) {
> - return -1;
> - }
> -
> - if (qemu_opts_foreach(qemu_find_opts("nic"), net_param_nic, NULL, errp)) {
> - return -1;
> - }
> + qemu_opts_foreach(qemu_find_opts("netdev"), net_init_netdev, NULL,
> + &error_fatal);
>
> - if (qemu_opts_foreach(qemu_find_opts("net"), net_init_client, NULL, errp)) {
> - return -1;
> - }
> + qemu_opts_foreach(qemu_find_opts("nic"), net_param_nic, NULL,
> + &error_fatal);
>
> - return 0;
> + qemu_opts_foreach(qemu_find_opts("net"), net_init_client, NULL,
> + &error_fatal);
> }
>
> int net_client_parse(QemuOptsList *opts_list, const char *optarg)
> diff --git a/softmmu/vl.c b/softmmu/vl.c
> index dea4005e4791..1fe8b5c5a120 100644
> --- a/softmmu/vl.c
> +++ b/softmmu/vl.c
> @@ -1906,7 +1906,7 @@ static void qemu_create_late_backends(void)
> qtest_server_init(qtest_chrdev, qtest_log, &error_fatal);
> }
>
> - net_init_clients(&error_fatal);
> + net_init_clients();
>
> object_option_foreach_add(object_create_late);
>
--
David Gibson | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_
| _way_ _around_!
http://www.ozlabs.org/~dgibson
[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 833 bytes --]
^ permalink raw reply [flat|nested] 31+ messages in thread
* Re: [PATCH v8 03/14] net: simplify net_client_parse() error management
2022-09-13 6:39 ` [PATCH v8 03/14] net: simplify net_client_parse() error management Laurent Vivier
@ 2022-09-14 2:29 ` David Gibson
0 siblings, 0 replies; 31+ messages in thread
From: David Gibson @ 2022-09-14 2:29 UTC (permalink / raw)
To: Laurent Vivier
Cc: qemu-devel, Jason Wang, Paolo Bonzini, Gregory Kurz,
Daniel P. Berrangé,
Eric Blake, Markus Armbruster, Thomas Huth,
Dr. David Alan Gilbert
[-- Attachment #1: Type: text/plain, Size: 3095 bytes --]
On Tue, Sep 13, 2022 at 08:39:49AM +0200, Laurent Vivier wrote:
> All net_client_parse() callers exit in case of error.
>
> Move exit(1) to net_client_parse() and remove error checking from
> the callers.
>
> Suggested-by: Markus Armbruster <armbru@redhat.com>
> Signed-off-by: Laurent Vivier <lvivier@redhat.com>
> Reviewed-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
> ---
> include/net/net.h | 2 +-
> net/net.c | 6 ++----
> softmmu/vl.c | 12 +++---------
> 3 files changed, 6 insertions(+), 14 deletions(-)
>
> diff --git a/include/net/net.h b/include/net/net.h
> index c1c34a58f849..55023e7e9fa9 100644
> --- a/include/net/net.h
> +++ b/include/net/net.h
> @@ -220,7 +220,7 @@ extern NICInfo nd_table[MAX_NICS];
> extern const char *host_net_devices[];
>
> /* from net.c */
> -int net_client_parse(QemuOptsList *opts_list, const char *str);
> +void net_client_parse(QemuOptsList *opts_list, const char *str);
> void show_netdevs(void);
> void net_init_clients(void);
> void net_check_clients(void);
> diff --git a/net/net.c b/net/net.c
> index 15958f881776..f056e8aebfb2 100644
> --- a/net/net.c
> +++ b/net/net.c
> @@ -1579,13 +1579,11 @@ void net_init_clients(void)
> &error_fatal);
> }
>
> -int net_client_parse(QemuOptsList *opts_list, const char *optarg)
> +void net_client_parse(QemuOptsList *opts_list, const char *optarg)
> {
> if (!qemu_opts_parse_noisily(opts_list, optarg, true)) {
> - return -1;
> + exit(1);
> }
> -
> - return 0;
> }
>
> /* From FreeBSD */
> diff --git a/softmmu/vl.c b/softmmu/vl.c
> index 1fe8b5c5a120..55d163475e9e 100644
> --- a/softmmu/vl.c
> +++ b/softmmu/vl.c
> @@ -2809,21 +2809,15 @@ void qemu_init(int argc, char **argv, char **envp)
> break;
> case QEMU_OPTION_netdev:
> default_net = 0;
> - if (net_client_parse(qemu_find_opts("netdev"), optarg) == -1) {
> - exit(1);
> - }
> + net_client_parse(qemu_find_opts("netdev"), optarg);
> break;
> case QEMU_OPTION_nic:
> default_net = 0;
> - if (net_client_parse(qemu_find_opts("nic"), optarg) == -1) {
> - exit(1);
> - }
> + net_client_parse(qemu_find_opts("nic"), optarg);
> break;
> case QEMU_OPTION_net:
> default_net = 0;
> - if (net_client_parse(qemu_find_opts("net"), optarg) == -1) {
> - exit(1);
> - }
> + net_client_parse(qemu_find_opts("net"), optarg);
> break;
> #ifdef CONFIG_LIBISCSI
> case QEMU_OPTION_iscsi:
--
David Gibson | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_
| _way_ _around_!
http://www.ozlabs.org/~dgibson
[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 833 bytes --]
^ permalink raw reply [flat|nested] 31+ messages in thread
* Re: [PATCH v8 05/14] qapi: net: add stream and dgram netdevs
2022-09-13 6:39 ` [PATCH v8 05/14] qapi: net: add stream and dgram netdevs Laurent Vivier
@ 2022-09-14 5:03 ` David Gibson
0 siblings, 0 replies; 31+ messages in thread
From: David Gibson @ 2022-09-14 5:03 UTC (permalink / raw)
To: Laurent Vivier
Cc: qemu-devel, Jason Wang, Paolo Bonzini, Gregory Kurz,
Daniel P. Berrangé,
Eric Blake, Markus Armbruster, Thomas Huth,
Dr. David Alan Gilbert, Stefano Brivio
[-- Attachment #1: Type: text/plain, Size: 47572 bytes --]
On Tue, Sep 13, 2022 at 08:39:51AM +0200, Laurent Vivier wrote:
> Copied from socket netdev file and modified to use SocketAddress
> to be able to introduce new features like unix socket.
>
> "udp" and "mcast" are squashed into dgram netdev, multicast is detected
> according to the IP address type.
> "listen" and "connect" modes are managed by stream netdev. An optional
> parameter "server" defines the mode (server by default)
>
> The two new types need to be parsed the modern way with -netdev, because
> with the traditional way, the "type" field of netdev structure collides with
> the "type" field of SocketAddress and prevents the correct evaluation of the
> command line option. Moreover the traditional way doesn't allow to use
> the same type (SocketAddress) several times with the -netdev option
> (needed to specify "local" and "remote" addresses).
>
> The previous commit paved the way for parsing the modern way, but
> omitted one detail: how to pick modern vs. traditional, in
> netdev_is_modern().
>
> We want to pick based on the value of parameter "type". But how to
> extract it from the option argument?
>
> Parsing the option argument, either the modern or the traditional way,
> extracts it for us, but only if parsing succeeds.
>
> If parsing fails, there is no good option. No matter which parser we
> pick, it'll be the wrong one for some arguments, and the error
> reporting will be confusing.
>
> Fortunately, the traditional parser accepts *anything* when called in
> a certain way. This maximizes our chance to extract the value of
> "type", and in turn minimizes the risk of confusing error reporting.
>
> Signed-off-by: Laurent Vivier <lvivier@redhat.com>
> Reviewed-by: Stefano Brivio <sbrivio@redhat.com>
> ---
> hmp-commands.hx | 2 +-
> net/clients.h | 6 +
> net/dgram.c | 631 ++++++++++++++++++++++++++++++++++++++++++++++++
> net/hub.c | 2 +
> net/meson.build | 2 +
> net/net.c | 30 ++-
> net/stream.c | 423 ++++++++++++++++++++++++++++++++
> qapi/net.json | 63 ++++-
> qemu-options.hx | 12 +
> 9 files changed, 1167 insertions(+), 4 deletions(-)
> create mode 100644 net/dgram.c
> create mode 100644 net/stream.c
>
> diff --git a/hmp-commands.hx b/hmp-commands.hx
> index 182e639d1498..83e8d45a2a8b 100644
> --- a/hmp-commands.hx
> +++ b/hmp-commands.hx
> @@ -1276,7 +1276,7 @@ ERST
> {
> .name = "netdev_add",
> .args_type = "netdev:O",
> - .params = "[user|tap|socket|vde|bridge|hubport|netmap|vhost-user"
> + .params = "[user|tap|socket|stream|dgram|vde|bridge|hubport|netmap|vhost-user"
> #ifdef CONFIG_VMNET
> "|vmnet-host|vmnet-shared|vmnet-bridged"
> #endif
> diff --git a/net/clients.h b/net/clients.h
> index c9157789f2ce..ed8bdfff1e7c 100644
> --- a/net/clients.h
> +++ b/net/clients.h
> @@ -40,6 +40,12 @@ int net_init_hubport(const Netdev *netdev, const char *name,
> int net_init_socket(const Netdev *netdev, const char *name,
> NetClientState *peer, Error **errp);
>
> +int net_init_stream(const Netdev *netdev, const char *name,
> + NetClientState *peer, Error **errp);
> +
> +int net_init_dgram(const Netdev *netdev, const char *name,
> + NetClientState *peer, Error **errp);
> +
> int net_init_tap(const Netdev *netdev, const char *name,
> NetClientState *peer, Error **errp);
>
> diff --git a/net/dgram.c b/net/dgram.c
> new file mode 100644
> index 000000000000..dbe65102d174
> --- /dev/null
> +++ b/net/dgram.c
> @@ -0,0 +1,631 @@
> +/*
> + * QEMU System Emulator
> + *
> + * Copyright (c) 2003-2008 Fabrice Bellard
Shouldn't this have your copyright as well as Fabrice's old one copied
from socket.c?
> + *
> + * Permission is hereby granted, free of charge, to any person obtaining a copy
> + * of this software and associated documentation files (the "Software"), to deal
> + * in the Software without restriction, including without limitation the rights
> + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
> + * copies of the Software, and to permit persons to whom the Software is
> + * furnished to do so, subject to the following conditions:
> + *
> + * The above copyright notice and this permission notice shall be included in
> + * all copies or substantial portions of the Software.
> + *
> + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
> + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
> + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
> + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
> + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
> + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
> + * THE SOFTWARE.
> + */
> +
> +#include "qemu/osdep.h"
> +
> +#include "net/net.h"
> +#include "clients.h"
> +#include "monitor/monitor.h"
> +#include "qapi/error.h"
> +#include "qemu/error-report.h"
> +#include "qemu/option.h"
> +#include "qemu/sockets.h"
> +#include "qemu/iov.h"
> +#include "qemu/main-loop.h"
> +#include "qemu/cutils.h"
> +
> +typedef struct NetDgramState {
> + NetClientState nc;
> + int listen_fd;
AFAICT dgram sockets don't use the listen_fd (it's always -1).
> + int fd;
> + SocketReadState rs;
> + /* contains inet host and port destination iff connectionless (SOCK_DGRAM) */
Comment is confusing since this is now dgram specific.
> + struct sockaddr_in dgram_dst;
> + IOHandler *send_fn; /* differs between SOCK_STREAM/SOCK_DGRAM */
So, is this still needed now that it's dgram only?
> + bool read_poll; /* waiting to receive data? */
> + bool write_poll; /* waiting to transmit data? */
> +} NetDgramState;
> +
> +static void net_dgram_accept(void *opaque);
> +static void net_dgram_writable(void *opaque);
> +
> +static void net_dgram_update_fd_handler(NetDgramState *s)
> +{
> + qemu_set_fd_handler(s->fd,
> + s->read_poll ? s->send_fn : NULL,
> + s->write_poll ? net_dgram_writable : NULL,
> + s);
> +}
> +
> +static void net_dgram_read_poll(NetDgramState *s, bool enable)
> +{
> + s->read_poll = enable;
> + net_dgram_update_fd_handler(s);
> +}
> +
> +static void net_dgram_write_poll(NetDgramState *s, bool enable)
> +{
> + s->write_poll = enable;
> + net_dgram_update_fd_handler(s);
> +}
> +
> +static void net_dgram_writable(void *opaque)
> +{
> + NetDgramState *s = opaque;
> +
> + net_dgram_write_poll(s, false);
> +
> + qemu_flush_queued_packets(&s->nc);
> +}
> +
> +static ssize_t net_dgram_receive_dgram(NetClientState *nc,
> + const uint8_t *buf, size_t size)
> +{
> + NetDgramState *s = DO_UPCAST(NetDgramState, nc, nc);
> + ssize_t ret;
> +
> + do {
> + if (s->dgram_dst.sin_family != AF_UNIX) {
> + ret = sendto(s->fd, buf, size, 0,
> + (struct sockaddr *)&s->dgram_dst,
> + sizeof(s->dgram_dst));
> + } else {
> + ret = send(s->fd, buf, size, 0);
> + }
> + } while (ret == -1 && errno == EINTR);
> +
> + if (ret == -1 && errno == EAGAIN) {
> + net_dgram_write_poll(s, true);
> + return 0;
> + }
> + return ret;
> +}
> +
> +static void net_dgram_send_completed(NetClientState *nc, ssize_t len)
> +{
> + NetDgramState *s = DO_UPCAST(NetDgramState, nc, nc);
> +
> + if (!s->read_poll) {
> + net_dgram_read_poll(s, true);
> + }
> +}
> +
> +static void net_dgram_rs_finalize(SocketReadState *rs)
> +{
> + NetDgramState *s = container_of(rs, NetDgramState, rs);
> +
> + if (qemu_send_packet_async(&s->nc, rs->buf,
> + rs->packet_len,
> + net_dgram_send_completed) == 0) {
> + net_dgram_read_poll(s, false);
> + }
> +}
> +
> +static void net_dgram_send(void *opaque)
> +{
> + NetDgramState *s = opaque;
> + int size;
> + int ret;
> + uint8_t buf1[NET_BUFSIZE];
> + const uint8_t *buf;
> +
> + size = recv(s->fd, buf1, sizeof(buf1), 0);
> + if (size < 0) {
> + if (errno != EWOULDBLOCK) {
> + goto eoc;
> + }
> + } else if (size == 0) {
> + /* end of connection */
> + eoc:
> + net_dgram_read_poll(s, false);
> + net_dgram_write_poll(s, false);
> + if (s->listen_fd != -1) {
> + qemu_set_fd_handler(s->listen_fd, net_dgram_accept, NULL, s);
> + }
> + closesocket(s->fd);
> +
> + s->fd = -1;
> + net_socket_rs_init(&s->rs, net_dgram_rs_finalize, false);
> + s->nc.link_down = true;
> + memset(s->nc.info_str, 0, sizeof(s->nc.info_str));
> +
> + return;
> + }
> + buf = buf1;
> +
> + ret = net_fill_rstate(&s->rs, buf, size);
> +
> + if (ret == -1) {
> + goto eoc;
> + }
> +}
> +
> +static void net_dgram_send_dgram(void *opaque)
> +{
> + NetDgramState *s = opaque;
> + int size;
> +
> + size = recv(s->fd, s->rs.buf, sizeof(s->rs.buf), 0);
> + if (size < 0) {
> + return;
> + }
> + if (size == 0) {
> + /* end of connection */
> + net_dgram_read_poll(s, false);
> + net_dgram_write_poll(s, false);
> + return;
> + }
> + if (qemu_send_packet_async(&s->nc, s->rs.buf, size,
> + net_dgram_send_completed) == 0) {
> + net_dgram_read_poll(s, false);
> + }
> +}
> +
> +static int net_dgram_mcast_create(struct sockaddr_in *mcastaddr,
> + struct in_addr *localaddr,
> + Error **errp)
> +{
> + struct ip_mreq imr;
> + int fd;
> + int val, ret;
> +#ifdef __OpenBSD__
> + unsigned char loop;
> +#else
> + int loop;
> +#endif
> +
> + if (!IN_MULTICAST(ntohl(mcastaddr->sin_addr.s_addr))) {
> + error_setg(errp, "specified mcastaddr %s (0x%08x) "
> + "does not contain a multicast address",
> + inet_ntoa(mcastaddr->sin_addr),
> + (int)ntohl(mcastaddr->sin_addr.s_addr));
> + return -1;
> + }
> +
> + fd = qemu_socket(PF_INET, SOCK_DGRAM, 0);
> + if (fd < 0) {
> + error_setg_errno(errp, errno, "can't create datagram socket");
> + return -1;
> + }
> +
> + /*
> + * Allow multiple sockets to bind the same multicast ip and port by setting
> + * SO_REUSEADDR. This is the only situation where SO_REUSEADDR should be set
> + * on windows. Use socket_set_fast_reuse otherwise as it sets SO_REUSEADDR
> + * only on posix systems.
> + */
> + val = 1;
> + ret = setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &val, sizeof(val));
> + if (ret < 0) {
> + error_setg_errno(errp, errno, "can't set socket option SO_REUSEADDR");
> + goto fail;
> + }
> +
> + ret = bind(fd, (struct sockaddr *)mcastaddr, sizeof(*mcastaddr));
> + if (ret < 0) {
> + error_setg_errno(errp, errno, "can't bind ip=%s to socket",
> + inet_ntoa(mcastaddr->sin_addr));
> + goto fail;
> + }
> +
> + /* Add host to multicast group */
> + imr.imr_multiaddr = mcastaddr->sin_addr;
> + if (localaddr) {
> + imr.imr_interface = *localaddr;
> + } else {
> + imr.imr_interface.s_addr = htonl(INADDR_ANY);
> + }
> +
> + ret = setsockopt(fd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
> + &imr, sizeof(struct ip_mreq));
> + if (ret < 0) {
> + error_setg_errno(errp, errno,
> + "can't add socket to multicast group %s",
> + inet_ntoa(imr.imr_multiaddr));
> + goto fail;
> + }
> +
> + /* Force mcast msgs to loopback (eg. several QEMUs in same host */
> + loop = 1;
> + ret = setsockopt(fd, IPPROTO_IP, IP_MULTICAST_LOOP,
> + &loop, sizeof(loop));
> + if (ret < 0) {
> + error_setg_errno(errp, errno,
> + "can't force multicast message to loopback");
> + goto fail;
> + }
> +
> + /* If a bind address is given, only send packets from that address */
> + if (localaddr != NULL) {
> + ret = setsockopt(fd, IPPROTO_IP, IP_MULTICAST_IF,
> + localaddr, sizeof(*localaddr));
> + if (ret < 0) {
> + error_setg_errno(errp, errno,
> + "can't set the default network send interface");
> + goto fail;
> + }
> + }
> +
> + qemu_socket_set_nonblock(fd);
> + return fd;
> +fail:
> + if (fd >= 0) {
> + closesocket(fd);
> + }
> + return -1;
> +}
> +
> +static void net_dgram_cleanup(NetClientState *nc)
> +{
> + NetDgramState *s = DO_UPCAST(NetDgramState, nc, nc);
> + if (s->fd != -1) {
> + net_dgram_read_poll(s, false);
> + net_dgram_write_poll(s, false);
> + close(s->fd);
> + s->fd = -1;
> + }
> + if (s->listen_fd != -1) {
> + qemu_set_fd_handler(s->listen_fd, NULL, NULL, NULL);
> + closesocket(s->listen_fd);
> + s->listen_fd = -1;
> + }
> +}
> +
> +static NetClientInfo net_dgram_socket_info = {
> + .type = NET_CLIENT_DRIVER_DGRAM,
> + .size = sizeof(NetDgramState),
> + .receive = net_dgram_receive_dgram,
> + .cleanup = net_dgram_cleanup,
> +};
> +
> +static NetDgramState *net_dgram_fd_init_dgram(NetClientState *peer,
> + const char *model,
> + const char *name,
> + int fd, int is_fd,
> + SocketAddress *mcast,
> + Error **errp)
> +{
> + struct sockaddr_in saddr;
> + int newfd;
> + NetClientState *nc;
> + NetDgramState *s;
> + SocketAddress *sa;
> + SocketAddressType sa_type;
> +
> + sa = socket_local_address(fd, errp);
> + if (!sa) {
> + return NULL;
> + }
> + sa_type = sa->type;
> + qapi_free_SocketAddress(sa);
> +
> + /*
> + * fd passed: multicast: "learn" dgram_dst address from bound address and
> + * save it. Because this may be "shared" socket from a "master" process,
> + * datagrams would be recv() by ONLY ONE process: we must "clone" this
> + * dgram socket --jjo
> + */
> +
> + if (is_fd && mcast != NULL) {
> + if (convert_host_port(&saddr, mcast->u.inet.host,
> + mcast->u.inet.port, errp) < 0) {
> + goto err;
> + }
> + /* must be bound */
> + if (saddr.sin_addr.s_addr == 0) {
> + error_setg(errp, "can't setup multicast destination address");
> + goto err;
> + }
> + /* clone dgram socket */
> + newfd = net_dgram_mcast_create(&saddr, NULL, errp);
> + if (newfd < 0) {
> + goto err;
> + }
> + /* clone newfd to fd, close newfd */
> + dup2(newfd, fd);
> + close(newfd);
> +
> + }
> +
> + nc = qemu_new_net_client(&net_dgram_socket_info, peer, model, name);
> +
> + s = DO_UPCAST(NetDgramState, nc, nc);
> +
> + s->fd = fd;
> + s->listen_fd = -1;
> + s->send_fn = net_dgram_send_dgram;
> + net_socket_rs_init(&s->rs, net_dgram_rs_finalize, false);
> + net_dgram_read_poll(s, true);
> +
> + /* mcast: save bound address as dst */
> + if (is_fd && mcast != NULL) {
> + s->dgram_dst = saddr;
> + snprintf(nc->info_str, sizeof(nc->info_str),
> + "fd=%d (cloned mcast=%s:%d)",
> + fd, inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
> + } else {
> + if (sa_type == SOCKET_ADDRESS_TYPE_UNIX) {
> + s->dgram_dst.sin_family = AF_UNIX;
> + }
> +
> + snprintf(nc->info_str, sizeof(nc->info_str), "fd=%d %s", fd,
> + SocketAddressType_str(sa_type));
> + }
> +
> + return s;
> +
> +err:
> + closesocket(fd);
> + return NULL;
> +}
> +
> +static void net_dgram_connect(void *opaque)
> +{
> + NetDgramState *s = opaque;
> + s->send_fn = net_dgram_send;
> + net_dgram_read_poll(s, true);
> +}
> +
> +static void net_dgram_accept(void *opaque)
I don't think accept makes any sense for a datagram socket.
> +{
> + NetDgramState *s = opaque;
> + struct sockaddr_in saddr;
> + socklen_t len;
> + int fd;
> +
> + for (;;) {
> + len = sizeof(saddr);
> + fd = qemu_accept(s->listen_fd, (struct sockaddr *)&saddr, &len);
> + if (fd < 0 && errno != EINTR) {
> + return;
> + } else if (fd >= 0) {
> + qemu_set_fd_handler(s->listen_fd, NULL, NULL, NULL);
> + break;
> + }
> + }
> +
> + s->fd = fd;
> + s->nc.link_down = false;
> + net_dgram_connect(s);
> + snprintf(s->nc.info_str, sizeof(s->nc.info_str), "connection from %s:%d",
> + inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
> +}
> +
> +static int net_dgram_mcast_init(NetClientState *peer,
> + const char *model,
> + const char *name,
> + SocketAddress *remote,
> + SocketAddress *local,
> + Error **errp)
> +{
> + NetDgramState *s;
> + int fd, ret;
> + struct sockaddr_in saddr;
> +
> + if (remote->type != SOCKET_ADDRESS_TYPE_INET) {
> + error_setg(errp, "multicast only support inet type");
> + return -1;
> + }
> +
> + if (convert_host_port(&saddr, remote->u.inet.host, remote->u.inet.port,
> + errp) < 0) {
> + return -1;
> + }
> +
> + if (!local) {
> + fd = net_dgram_mcast_create(&saddr, NULL, errp);
> + if (fd < 0) {
> + return -1;
> + }
> + } else {
> + switch (local->type) {
> + case SOCKET_ADDRESS_TYPE_INET: {
> + struct in_addr localaddr;
> +
> + if (inet_aton(local->u.inet.host, &localaddr) == 0) {
> + error_setg(errp, "localaddr '%s' is not a valid IPv4 address",
> + local->u.inet.host);
> + return -1;
> + }
> +
> + fd = net_dgram_mcast_create(&saddr, &localaddr, errp);
> + if (fd < 0) {
> + return -1;
> + }
> + break;
> + }
> + case SOCKET_ADDRESS_TYPE_FD:
> + fd = monitor_fd_param(monitor_cur(), local->u.fd.str, errp);
> + if (fd == -1) {
> + return -1;
> + }
> + ret = qemu_socket_try_set_nonblock(fd);
> + if (ret < 0) {
> + error_setg_errno(errp, -ret, "%s: Can't use file descriptor %d",
> + name, fd);
> + return -1;
> + }
> + break;
> + default:
> + error_setg(errp, "only support inet or fd type for local");
> + return -1;
> + }
> + }
> +
> + s = net_dgram_fd_init_dgram(peer, model, name, fd,
> + local->type == SOCKET_ADDRESS_TYPE_FD,
> + remote, errp);
> + if (!s) {
> + return -1;
> + }
> +
> + s->dgram_dst = saddr;
> +
> + snprintf(s->nc.info_str, sizeof(s->nc.info_str), "mcast=%s:%d",
> + inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
> + return 0;
> +
> +}
> +
> +static int net_dgram_udp_init(NetClientState *peer,
> + const char *model,
> + const char *name,
> + SocketAddress *remote,
> + SocketAddress *local,
> + Error **errp)
IIUC, when passing as an fd, this could already be a Unix datagram
socket rather than an inet socket, in which case "udp" is misleading.
> +{
> + NetDgramState *s;
> + int fd, ret;
> + struct sockaddr_in raddr_in;
> + gchar *info_str;
> +
> + if (remote) {
> + if (local->type == SOCKET_ADDRESS_TYPE_FD) {
> + error_setg(errp, "don't set remote with local.fd");
> + return -1;
> + }
> + if (remote->type != local->type) {
> + error_setg(errp, "remote and local types must be the same");
> + return -1;
> + }
> + } else {
> + if (local->type != SOCKET_ADDRESS_TYPE_FD) {
> + error_setg(errp, "type=inet requires remote parameter");
> + return -1;
> + }
> + }
> +
> + switch (local->type) {
> + case SOCKET_ADDRESS_TYPE_INET: {
> + struct sockaddr_in laddr_in;
> +
> + if (convert_host_port(&laddr_in, local->u.inet.host, local->u.inet.port,
> + errp) < 0) {
> + return -1;
> + }
> +
> + if (convert_host_port(&raddr_in, remote->u.inet.host,
> + remote->u.inet.port, errp) < 0) {
> + return -1;
> + }
> +
> + fd = qemu_socket(PF_INET, SOCK_DGRAM, 0);
> + if (fd < 0) {
> + error_setg_errno(errp, errno, "can't create datagram socket");
> + return -1;
> + }
> +
> + ret = socket_set_fast_reuse(fd);
> + if (ret < 0) {
> + error_setg_errno(errp, errno,
> + "can't set socket option SO_REUSEADDR");
> + closesocket(fd);
> + return -1;
> + }
> + ret = bind(fd, (struct sockaddr *)&laddr_in, sizeof(laddr_in));
> + if (ret < 0) {
> + error_setg_errno(errp, errno, "can't bind ip=%s to socket",
> + inet_ntoa(laddr_in.sin_addr));
> + closesocket(fd);
> + return -1;
> + }
> + qemu_socket_set_nonblock(fd);
> +
> + info_str = g_strdup_printf("udp=%s:%d/%s:%d",
> + inet_ntoa(laddr_in.sin_addr), ntohs(laddr_in.sin_port),
> + inet_ntoa(raddr_in.sin_addr), ntohs(raddr_in.sin_port));
> +
> + break;
> + }
> + case SOCKET_ADDRESS_TYPE_FD:
> + fd = monitor_fd_param(monitor_cur(), local->u.fd.str, errp);
> + if (fd == -1) {
> + return -1;
> + }
> + ret = qemu_socket_try_set_nonblock(fd);
> + if (ret < 0) {
> + error_setg_errno(errp, -ret, "%s: Can't use file descriptor %d",
> + name, fd);
> + return -1;
> + }
> + break;
> + default:
> + error_setg(errp, "only support inet or fd type for local");
> + return -1;
> + }
> +
> + s = net_dgram_fd_init_dgram(peer, model, name, fd, 0, NULL, errp);
> + if (!s) {
> + return -1;
> + }
> +
> + if (remote) {
> + s->dgram_dst = raddr_in;
> +
> + pstrcpy(s->nc.info_str, sizeof(s->nc.info_str), info_str);
> + g_free(info_str);
> + }
> + return 0;
> +}
> +
> +static int net_dgram_init(NetClientState *peer,
> + const char *model,
> + const char *name,
> + SocketAddress *remote,
> + SocketAddress *local,
> + Error **errp)
> +{
> + /* detect multicast address */
> + if (remote && remote->type == SOCKET_ADDRESS_TYPE_INET) {
> + struct sockaddr_in mcastaddr;
> +
> + if (convert_host_port(&mcastaddr, remote->u.inet.host,
> + remote->u.inet.port, errp) < 0) {
> + return -1;
> + }
> +
> + if (IN_MULTICAST(ntohl(mcastaddr.sin_addr.s_addr))) {
> + return net_dgram_mcast_init(peer, model, name, remote, local,
> + errp);
> + }
> + }
> + /* unicast address */
> + if (!local) {
> + error_setg(errp, "dgram requires local= parameter");
> + return -1;
> + }
> + return net_dgram_udp_init(peer, model, name, remote, local, errp);
Since this is called unconditionally and only here, would it make more
sense to just expand net_dgram_udp_init() inline.
> +}
> +
> +int net_init_dgram(const Netdev *netdev, const char *name,
> + NetClientState *peer, Error **errp)
> +{
> + const NetdevDgramOptions *sock;
> +
> + assert(netdev->type == NET_CLIENT_DRIVER_DGRAM);
> + sock = &netdev->u.dgram;
> +
> + return net_dgram_init(peer, "dgram", name, sock->remote, sock->local,
> + errp);
> +}
> diff --git a/net/hub.c b/net/hub.c
> index 1375738bf121..67ca53485638 100644
> --- a/net/hub.c
> +++ b/net/hub.c
> @@ -313,6 +313,8 @@ void net_hub_check_clients(void)
> case NET_CLIENT_DRIVER_USER:
> case NET_CLIENT_DRIVER_TAP:
> case NET_CLIENT_DRIVER_SOCKET:
> + case NET_CLIENT_DRIVER_STREAM:
> + case NET_CLIENT_DRIVER_DGRAM:
> case NET_CLIENT_DRIVER_VDE:
> case NET_CLIENT_DRIVER_VHOST_USER:
> has_host_dev = 1;
> diff --git a/net/meson.build b/net/meson.build
> index d1be76daf361..6cd1e3dab3a6 100644
> --- a/net/meson.build
> +++ b/net/meson.build
> @@ -13,6 +13,8 @@ softmmu_ss.add(files(
> 'net.c',
> 'queue.c',
> 'socket.c',
> + 'stream.c',
> + 'dgram.c',
> 'util.c',
> ))
>
> diff --git a/net/net.c b/net/net.c
> index ffe3e5a2cf1d..79e54e6228e8 100644
> --- a/net/net.c
> +++ b/net/net.c
> @@ -48,6 +48,7 @@
> #include "qemu/qemu-print.h"
> #include "qemu/main-loop.h"
> #include "qemu/option.h"
> +#include "qemu/keyval.h"
> #include "qapi/error.h"
> #include "qapi/opts-visitor.h"
> #include "sysemu/runstate.h"
> @@ -1014,6 +1015,8 @@ static int (* const net_client_init_fun[NET_CLIENT_DRIVER__MAX])(
> #endif
> [NET_CLIENT_DRIVER_TAP] = net_init_tap,
> [NET_CLIENT_DRIVER_SOCKET] = net_init_socket,
> + [NET_CLIENT_DRIVER_STREAM] = net_init_stream,
> + [NET_CLIENT_DRIVER_DGRAM] = net_init_dgram,
> #ifdef CONFIG_VDE
> [NET_CLIENT_DRIVER_VDE] = net_init_vde,
> #endif
> @@ -1101,6 +1104,8 @@ void show_netdevs(void)
> int idx;
> const char *available_netdevs[] = {
> "socket",
> + "stream",
> + "dgram",
> "hubport",
> "tap",
> #ifdef CONFIG_SLIRP
> @@ -1613,7 +1618,30 @@ void net_init_clients(void)
> */
> bool netdev_is_modern(const char *optarg)
> {
> - return false;
> + QemuOpts *opts;
> + bool is_modern;
> + const char *type;
> + static QemuOptsList dummy_opts = {
> + .name = "netdev",
> + .implied_opt_name = "type",
> + .head = QTAILQ_HEAD_INITIALIZER(dummy_opts.head),
> + .desc = { { } },
> + };
> +
> + if (optarg[0] == '{') {
> + /* This is JSON, which means it's modern syntax */
> + return true;
> + }
> +
> + opts = qemu_opts_create(&dummy_opts, NULL, false, &error_abort);
> + qemu_opts_do_parse(opts, optarg, dummy_opts.implied_opt_name,
> + &error_abort);
> + type = qemu_opt_get(opts, "type");
> + is_modern = !g_strcmp0(type, "stream") || !g_strcmp0(type, "dgram");
> +
> + qemu_opts_reset(&dummy_opts);
> +
> + return is_modern;
> }
>
> /*
> diff --git a/net/stream.c b/net/stream.c
> new file mode 100644
> index 000000000000..0851e90becca
> --- /dev/null
> +++ b/net/stream.c
> @@ -0,0 +1,423 @@
> +/*
> + * QEMU System Emulator
> + *
> + * Copyright (c) 2003-2008 Fabrice Bellard
Same comments on the copyright message as for dgram.c.
> + *
> + * Permission is hereby granted, free of charge, to any person obtaining a copy
> + * of this software and associated documentation files (the "Software"), to deal
> + * in the Software without restriction, including without limitation the rights
> + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
> + * copies of the Software, and to permit persons to whom the Software is
> + * furnished to do so, subject to the following conditions:
> + *
> + * The above copyright notice and this permission notice shall be included in
> + * all copies or substantial portions of the Software.
> + *
> + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
> + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
> + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
> + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
> + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
> + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
> + * THE SOFTWARE.
> + */
> +
> +#include "qemu/osdep.h"
> +
> +#include "net/net.h"
> +#include "clients.h"
> +#include "monitor/monitor.h"
> +#include "qapi/error.h"
> +#include "qemu/error-report.h"
> +#include "qemu/option.h"
> +#include "qemu/sockets.h"
> +#include "qemu/iov.h"
> +#include "qemu/main-loop.h"
> +#include "qemu/cutils.h"
> +
> +typedef struct NetStreamState {
> + NetClientState nc;
> + int listen_fd;
> + int fd;
> + SocketReadState rs;
> + unsigned int send_index; /* number of bytes sent*/
> + IOHandler *send_fn;
AFAICT, this always has the same value, so do we need the field?
> + bool read_poll; /* waiting to receive data? */
> + bool write_poll; /* waiting to transmit data? */
> +} NetStreamState;
> +
> +static void net_stream_accept(void *opaque);
> +static void net_stream_writable(void *opaque);
> +
> +static void net_stream_update_fd_handler(NetStreamState *s)
> +{
> + qemu_set_fd_handler(s->fd,
> + s->read_poll ? s->send_fn : NULL,
> + s->write_poll ? net_stream_writable : NULL,
> + s);
> +}
> +
> +static void net_stream_read_poll(NetStreamState *s, bool enable)
> +{
> + s->read_poll = enable;
> + net_stream_update_fd_handler(s);
> +}
> +
> +static void net_stream_write_poll(NetStreamState *s, bool enable)
> +{
> + s->write_poll = enable;
> + net_stream_update_fd_handler(s);
> +}
> +
> +static void net_stream_writable(void *opaque)
> +{
> + NetStreamState *s = opaque;
> +
> + net_stream_write_poll(s, false);
> +
> + qemu_flush_queued_packets(&s->nc);
> +}
> +
> +static ssize_t net_stream_receive(NetClientState *nc, const uint8_t *buf,
> + size_t size)
> +{
> + NetStreamState *s = DO_UPCAST(NetStreamState, nc, nc);
> + uint32_t len = htonl(size);
> + struct iovec iov[] = {
> + {
> + .iov_base = &len,
> + .iov_len = sizeof(len),
> + }, {
> + .iov_base = (void *)buf,
> + .iov_len = size,
> + },
> + };
> + size_t remaining;
> + ssize_t ret;
> +
> + remaining = iov_size(iov, 2) - s->send_index;
> + ret = iov_send(s->fd, iov, 2, s->send_index, remaining);
> +
> + if (ret == -1 && errno == EAGAIN) {
> + ret = 0; /* handled further down */
> + }
> + if (ret == -1) {
> + s->send_index = 0;
> + return -errno;
> + }
> + if (ret < (ssize_t)remaining) {
> + s->send_index += ret;
> + net_stream_write_poll(s, true);
> + return 0;
> + }
> + s->send_index = 0;
> + return size;
> +}
> +
> +static void net_stream_send_completed(NetClientState *nc, ssize_t len)
> +{
> + NetStreamState *s = DO_UPCAST(NetStreamState, nc, nc);
> +
> + if (!s->read_poll) {
> + net_stream_read_poll(s, true);
> + }
> +}
> +
> +static void net_stream_rs_finalize(SocketReadState *rs)
> +{
> + NetStreamState *s = container_of(rs, NetStreamState, rs);
> +
> + if (qemu_send_packet_async(&s->nc, rs->buf,
> + rs->packet_len,
> + net_stream_send_completed) == 0) {
> + net_stream_read_poll(s, false);
> + }
> +}
> +
> +static void net_stream_send(void *opaque)
> +{
> + NetStreamState *s = opaque;
> + int size;
> + int ret;
> + uint8_t buf1[NET_BUFSIZE];
> + const uint8_t *buf;
> +
> + size = recv(s->fd, buf1, sizeof(buf1), 0);
> + if (size < 0) {
> + if (errno != EWOULDBLOCK) {
> + goto eoc;
> + }
> + } else if (size == 0) {
> + /* end of connection */
> + eoc:
> + net_stream_read_poll(s, false);
> + net_stream_write_poll(s, false);
> + if (s->listen_fd != -1) {
> + qemu_set_fd_handler(s->listen_fd, net_stream_accept, NULL, s);
> + }
> + closesocket(s->fd);
> +
> + s->fd = -1;
> + net_socket_rs_init(&s->rs, net_stream_rs_finalize, false);
> + s->nc.link_down = true;
> + memset(s->nc.info_str, 0, sizeof(s->nc.info_str));
> +
> + return;
> + }
> + buf = buf1;
> +
> + ret = net_fill_rstate(&s->rs, buf, size);
> +
> + if (ret == -1) {
> + goto eoc;
> + }
> +}
> +
> +static void net_stream_cleanup(NetClientState *nc)
> +{
> + NetStreamState *s = DO_UPCAST(NetStreamState, nc, nc);
> + if (s->fd != -1) {
> + net_stream_read_poll(s, false);
> + net_stream_write_poll(s, false);
> + close(s->fd);
> + s->fd = -1;
> + }
> + if (s->listen_fd != -1) {
> + qemu_set_fd_handler(s->listen_fd, NULL, NULL, NULL);
> + closesocket(s->listen_fd);
> + s->listen_fd = -1;
> + }
> +}
> +
> +static void net_stream_connect(void *opaque)
> +{
> + NetStreamState *s = opaque;
> + s->send_fn = net_stream_send;
> + net_stream_read_poll(s, true);
> +}
> +
> +static NetClientInfo net_stream_info = {
> + .type = NET_CLIENT_DRIVER_STREAM,
> + .size = sizeof(NetStreamState),
> + .receive = net_stream_receive,
> + .cleanup = net_stream_cleanup,
> +};
> +
> +static NetStreamState *net_stream_fd_init_stream(NetClientState *peer,
> + const char *model,
> + const char *name,
> + int fd, int is_connected)
> +{
> + NetClientState *nc;
> + NetStreamState *s;
> +
> + nc = qemu_new_net_client(&net_stream_info, peer, model, name);
> +
> + snprintf(nc->info_str, sizeof(nc->info_str), "fd=%d", fd);
> +
> + s = DO_UPCAST(NetStreamState, nc, nc);
> +
> + s->fd = fd;
> + s->listen_fd = -1;
> + net_socket_rs_init(&s->rs, net_stream_rs_finalize, false);
> +
> + /* Disable Nagle algorithm on TCP sockets to reduce latency */
> + socket_set_nodelay(fd);
> +
> + if (is_connected) {
> + net_stream_connect(s);
> + } else {
> + qemu_set_fd_handler(s->fd, NULL, net_stream_connect, s);
> + }
> + return s;
> +}
> +
> +static void net_stream_accept(void *opaque)
> +{
> + NetStreamState *s = opaque;
> + struct sockaddr_in saddr;
> + socklen_t len;
> + int fd;
> +
> + for (;;) {
> + len = sizeof(saddr);
> + fd = qemu_accept(s->listen_fd, (struct sockaddr *)&saddr, &len);
> + if (fd < 0 && errno != EINTR) {
> + return;
> + } else if (fd >= 0) {
> + qemu_set_fd_handler(s->listen_fd, NULL, NULL, NULL);
> + break;
> + }
> + }
> +
> + s->fd = fd;
> + s->nc.link_down = false;
> + net_stream_connect(s);
> + snprintf(s->nc.info_str, sizeof(s->nc.info_str),
> + "connection from %s:%d",
> + inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
> +}
> +
> +static int net_stream_server_init(NetClientState *peer,
> + const char *model,
> + const char *name,
> + SocketAddress *addr,
> + Error **errp)
> +{
> + NetClientState *nc;
> + NetStreamState *s;
> + int fd, ret;
> +
> + switch (addr->type) {
> + case SOCKET_ADDRESS_TYPE_INET: {
> + struct sockaddr_in saddr_in;
> +
> + if (convert_host_port(&saddr_in, addr->u.inet.host, addr->u.inet.port,
> + errp) < 0) {
> + return -1;
> + }
> +
> + fd = qemu_socket(PF_INET, SOCK_STREAM, 0);
> + if (fd < 0) {
> + error_setg_errno(errp, errno, "can't create stream socket");
> + return -1;
> + }
> + qemu_socket_set_nonblock(fd);
> +
> + socket_set_fast_reuse(fd);
> +
> + ret = bind(fd, (struct sockaddr *)&saddr_in, sizeof(saddr_in));
> + if (ret < 0) {
> + error_setg_errno(errp, errno, "can't bind ip=%s to socket",
> + inet_ntoa(saddr_in.sin_addr));
> + closesocket(fd);
> + return -1;
> + }
> + break;
> + }
> + case SOCKET_ADDRESS_TYPE_FD:
> + fd = monitor_fd_param(monitor_cur(), addr->u.fd.str, errp);
> + if (fd == -1) {
> + return -1;
> + }
> + ret = qemu_socket_try_set_nonblock(fd);
> + if (ret < 0) {
> + error_setg_errno(errp, -ret, "%s: Can't use file descriptor %d",
> + name, fd);
> + return -1;
> + }
> + break;
> + default:
> + error_setg(errp, "only support inet or fd type");
> + return -1;
> + }
> +
> + ret = listen(fd, 0);
> + if (ret < 0) {
> + error_setg_errno(errp, errno, "can't listen on socket");
> + closesocket(fd);
> + return -1;
> + }
> +
> + nc = qemu_new_net_client(&net_stream_info, peer, model, name);
> + s = DO_UPCAST(NetStreamState, nc, nc);
> + s->fd = -1;
> + s->listen_fd = fd;
> + s->nc.link_down = true;
> + net_socket_rs_init(&s->rs, net_stream_rs_finalize, false);
> +
> + qemu_set_fd_handler(s->listen_fd, net_stream_accept, NULL, s);
> + return 0;
> +}
> +
> +static int net_stream_client_init(NetClientState *peer,
> + const char *model,
> + const char *name,
> + SocketAddress *addr,
> + Error **errp)
> +{
> + NetStreamState *s;
> + int fd, connected, ret;
> + gchar *info_str;
> +
> + switch (addr->type) {
> + case SOCKET_ADDRESS_TYPE_INET: {
> + struct sockaddr_in saddr_in;
> +
> + if (convert_host_port(&saddr_in, addr->u.inet.host, addr->u.inet.port,
> + errp) < 0) {
> + return -1;
> + }
> +
> + fd = qemu_socket(PF_INET, SOCK_STREAM, 0);
> + if (fd < 0) {
> + error_setg_errno(errp, errno, "can't create stream socket");
> + return -1;
> + }
> + qemu_socket_set_nonblock(fd);
> +
> + connected = 0;
> + for (;;) {
> + ret = connect(fd, (struct sockaddr *)&saddr_in, sizeof(saddr_in));
> + if (ret < 0) {
> + if (errno == EINTR || errno == EWOULDBLOCK) {
> + /* continue */
> + } else if (errno == EINPROGRESS ||
> + errno == EALREADY ||
> + errno == EINVAL) {
> + break;
> + } else {
> + error_setg_errno(errp, errno, "can't connect socket");
> + closesocket(fd);
> + return -1;
> + }
> + } else {
> + connected = 1;
> + break;
> + }
> + }
> + info_str = g_strdup_printf("connect to %s:%d",
> + inet_ntoa(saddr_in.sin_addr),
> + ntohs(saddr_in.sin_port));
> + break;
> + }
> + case SOCKET_ADDRESS_TYPE_FD:
> + fd = monitor_fd_param(monitor_cur(), addr->u.fd.str, errp);
> + if (fd == -1) {
> + return -1;
> + }
> + ret = qemu_socket_try_set_nonblock(fd);
> + if (ret < 0) {
> + error_setg_errno(errp, -ret, "%s: Can't use file descriptor %d",
> + name, fd);
> + return -1;
> + }
> + connected = 1;
> + info_str = g_strdup_printf("connect to fd %d", fd);
> + break;
> + default:
> + error_setg(errp, "only support inet or fd type");
> + return -1;
> + }
> +
> + s = net_stream_fd_init_stream(peer, model, name, fd, connected);
> +
> + pstrcpy(s->nc.info_str, sizeof(s->nc.info_str), info_str);
> + g_free(info_str);
> +
> + return 0;
> +}
> +
> +int net_init_stream(const Netdev *netdev, const char *name,
> + NetClientState *peer, Error **errp)
> +{
> + const NetdevStreamOptions *sock;
> +
> + assert(netdev->type == NET_CLIENT_DRIVER_STREAM);
> + sock = &netdev->u.stream;
> +
> + if (!sock->has_server || sock->server) {
> + return net_stream_server_init(peer, "stream", name, sock->addr, errp);
> + }
> + return net_stream_client_init(peer, "stream", name, sock->addr, errp);
> +}
> diff --git a/qapi/net.json b/qapi/net.json
> index dd088c09c509..e02e8001a000 100644
> --- a/qapi/net.json
> +++ b/qapi/net.json
> @@ -7,6 +7,7 @@
> ##
>
> { 'include': 'common.json' }
> +{ 'include': 'sockets.json' }
>
> ##
> # @set_link:
> @@ -573,6 +574,61 @@
> '*isolated': 'bool' },
> 'if': 'CONFIG_VMNET' }
>
> +##
> +# @NetdevStreamOptions:
> +#
> +# Configuration info for stream socket netdev
> +#
> +# @addr: socket address to listen on (server=true)
> +# or connect to (server=false)
> +# @server: create server socket (default: true)
> +#
> +# Only SocketAddress types 'inet' and 'fd' are supported.
> +#
> +# Since: 7.1
> +##
> +{ 'struct': 'NetdevStreamOptions',
> + 'data': {
> + 'addr': 'SocketAddress',
> + '*server': 'bool' } }
> +
> +##
> +# @NetdevDgramOptions:
> +#
> +# Configuration info for datagram socket netdev.
> +#
> +# @remote: remote address
> +# @local: local address
> +#
> +# Only SocketAddress types 'inet' and 'fd' are supported.
> +#
> +# The code checks there is at least one of these options and reports an error
> +# if not. If remote address is present and it's a multicast address, local
> +# address is optional. Otherwise local address is required and remote address
> +# is optional.
> +#
> +# .. table:: Valid parameters combination table
> +# :widths: auto
> +#
> +# ============= ======== =====
> +# remote local okay?
> +# ============= ======== =====
> +# absent absent no
> +# absent not fd no
> +# absent fd yes
> +# multicast absent yes
> +# multicast present yes
> +# not multicast absent no
> +# not multicast present yes
> +# ============= ======== =====
> +#
> +# Since: 7.1
> +##
> +{ 'struct': 'NetdevDgramOptions',
> + 'data': {
> + '*local': 'SocketAddress',
> + '*remote': 'SocketAddress' } }
> +
> ##
> # @NetClientDriver:
> #
> @@ -586,8 +642,9 @@
> # @vmnet-bridged since 7.1
> ##
> { 'enum': 'NetClientDriver',
> - 'data': [ 'none', 'nic', 'user', 'tap', 'l2tpv3', 'socket', 'vde',
> - 'bridge', 'hubport', 'netmap', 'vhost-user', 'vhost-vdpa',
> + 'data': [ 'none', 'nic', 'user', 'tap', 'l2tpv3', 'socket', 'stream',
> + 'dgram', 'vde', 'bridge', 'hubport', 'netmap', 'vhost-user',
> + 'vhost-vdpa',
> { 'name': 'vmnet-host', 'if': 'CONFIG_VMNET' },
> { 'name': 'vmnet-shared', 'if': 'CONFIG_VMNET' },
> { 'name': 'vmnet-bridged', 'if': 'CONFIG_VMNET' }] }
> @@ -617,6 +674,8 @@
> 'tap': 'NetdevTapOptions',
> 'l2tpv3': 'NetdevL2TPv3Options',
> 'socket': 'NetdevSocketOptions',
> + 'stream': 'NetdevStreamOptions',
> + 'dgram': 'NetdevDgramOptions',
> 'vde': 'NetdevVdeOptions',
> 'bridge': 'NetdevBridgeOptions',
> 'hubport': 'NetdevHubPortOptions',
> diff --git a/qemu-options.hx b/qemu-options.hx
> index 31c04f7eea0b..bb16a61bae8e 100644
> --- a/qemu-options.hx
> +++ b/qemu-options.hx
> @@ -2732,6 +2732,18 @@ DEF("netdev", HAS_ARG, QEMU_OPTION_netdev,
> "-netdev socket,id=str[,fd=h][,udp=host:port][,localaddr=host:port]\n"
> " configure a network backend to connect to another network\n"
> " using an UDP tunnel\n"
> + "-netdev stream,id=str[,server=on|off],addr.type=inet,addr.host=host,addr.port=port\n"
> + "-netdev stream,id=str[,server=on|off],addr.type=fd,addr.str=h\n"
> + " configure a network backend to connect to another network\n"
> + " using a socket connection in stream mode.\n"
> + "-netdev dgram,id=str,remote.type=inet,remote.host=maddr,remote.port=port[,local.type=inet,local.host=addr]\n"
> + "-netdev dgram,id=str,remote.type=inet,remote.host=maddr,remote.port=port[,local.type=fd,local.str=h]\n"
> + " configure a network backend to connect to a multicast maddr and port\n"
> + " use ``local.host=addr`` to specify the host address to send packets from\n"
> + "-netdev dgram,id=str,local.type=inet,local.host=addr,local.port=port[,remote.type=inet,remote.host=addr,remote.port=port]\n"
> + "-netdev dgram,id=str,local.type=fd,local.str=h\n"
> + " configure a network backend to connect to another network\n"
> + " using an UDP tunnel\n"
> #ifdef CONFIG_VDE
> "-netdev vde,id=str[,sock=socketpath][,port=n][,group=groupname][,mode=octalmode]\n"
> " configure a network backend to connect to port 'n' of a vde switch\n"
--
David Gibson | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_
| _way_ _around_!
http://www.ozlabs.org/~dgibson
[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 833 bytes --]
^ permalink raw reply [flat|nested] 31+ messages in thread
* Re: [PATCH v8 06/14] net: stream: Don't ignore EINVAL on netdev socket connection
2022-09-13 6:39 ` [PATCH v8 06/14] net: stream: Don't ignore EINVAL on netdev socket connection Laurent Vivier
@ 2022-09-14 5:05 ` David Gibson
2022-09-23 14:58 ` Laurent Vivier
0 siblings, 1 reply; 31+ messages in thread
From: David Gibson @ 2022-09-14 5:05 UTC (permalink / raw)
To: Laurent Vivier
Cc: qemu-devel, Jason Wang, Paolo Bonzini, Gregory Kurz,
Daniel P. Berrangé,
Eric Blake, Markus Armbruster, Thomas Huth,
Dr. David Alan Gilbert, Stefano Brivio
[-- Attachment #1: Type: text/plain, Size: 1516 bytes --]
On Tue, Sep 13, 2022 at 08:39:52AM +0200, Laurent Vivier wrote:
> From: Stefano Brivio <sbrivio@redhat.com>
>
> Other errors are treated as failure by net_stream_client_init(),
> but if connect() returns EINVAL, we'll fail silently. Remove the
> related exception.
Is this also a bug in net_socket_connect_init()? Is there an
equivalent bug in dgram.c?
> Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
> [lvivier: applied to net/stream.c]
> Signed-off-by: Laurent Vivier <lvivier@redhat.com>
> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
> ---
> net/stream.c | 3 +--
> 1 file changed, 1 insertion(+), 2 deletions(-)
>
> diff --git a/net/stream.c b/net/stream.c
> index 0851e90becca..e8afbaca50b6 100644
> --- a/net/stream.c
> +++ b/net/stream.c
> @@ -363,8 +363,7 @@ static int net_stream_client_init(NetClientState *peer,
> if (errno == EINTR || errno == EWOULDBLOCK) {
> /* continue */
> } else if (errno == EINPROGRESS ||
> - errno == EALREADY ||
> - errno == EINVAL) {
> + errno == EALREADY) {
> break;
> } else {
> error_setg_errno(errp, errno, "can't connect socket");
--
David Gibson | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_
| _way_ _around_!
http://www.ozlabs.org/~dgibson
[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 833 bytes --]
^ permalink raw reply [flat|nested] 31+ messages in thread
* Re: [PATCH v8 07/14] net: stream: add unix socket
2022-09-13 6:39 ` [PATCH v8 07/14] net: stream: add unix socket Laurent Vivier
@ 2022-09-14 5:16 ` David Gibson
2022-09-26 12:15 ` Laurent Vivier
0 siblings, 1 reply; 31+ messages in thread
From: David Gibson @ 2022-09-14 5:16 UTC (permalink / raw)
To: Laurent Vivier
Cc: qemu-devel, Jason Wang, Paolo Bonzini, Gregory Kurz,
Daniel P. Berrangé,
Eric Blake, Markus Armbruster, Thomas Huth,
Dr. David Alan Gilbert, Stefano Brivio
[-- Attachment #1: Type: text/plain, Size: 7624 bytes --]
On Tue, Sep 13, 2022 at 08:39:53AM +0200, Laurent Vivier wrote:
> Signed-off-by: Laurent Vivier <lvivier@redhat.com>
> Reviewed-by: Stefano Brivio <sbrivio@redhat.com>
> ---
> net/stream.c | 108 +++++++++++++++++++++++++++++++++++++++++++++---
> qapi/net.json | 2 +-
> qemu-options.hx | 1 +
> 3 files changed, 105 insertions(+), 6 deletions(-)
>
> diff --git a/net/stream.c b/net/stream.c
> index e8afbaca50b6..0f91ff20df61 100644
> --- a/net/stream.c
> +++ b/net/stream.c
> @@ -235,7 +235,7 @@ static NetStreamState *net_stream_fd_init_stream(NetClientState *peer,
> static void net_stream_accept(void *opaque)
> {
> NetStreamState *s = opaque;
> - struct sockaddr_in saddr;
> + struct sockaddr_storage saddr;
> socklen_t len;
> int fd;
>
> @@ -253,9 +253,27 @@ static void net_stream_accept(void *opaque)
> s->fd = fd;
> s->nc.link_down = false;
> net_stream_connect(s);
> - snprintf(s->nc.info_str, sizeof(s->nc.info_str),
> - "connection from %s:%d",
> - inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
> + switch (saddr.ss_family) {
> + case AF_INET: {
> + struct sockaddr_in *saddr_in = (struct sockaddr_in *)&saddr;
> +
> + snprintf(s->nc.info_str, sizeof(s->nc.info_str),
> + "connection from %s:%d",
> + inet_ntoa(saddr_in->sin_addr), ntohs(saddr_in->sin_port));
> + break;
> + }
> + case AF_UNIX: {
> + struct sockaddr_un saddr_un;
> +
> + len = sizeof(saddr_un);
> + getsockname(s->listen_fd, (struct sockaddr *)&saddr_un, &len);
It seems like there's an asymmetry here in that we've gotten the
connection address outside the switch for inet sockets, but we need an
additional getsockname() for unix sockets. Am I missing something?
> + snprintf(s->nc.info_str, sizeof(s->nc.info_str),
> + "connect from %s", saddr_un.sun_path);
> + break;
> + }
> + default:
> + g_assert_not_reached();
> + }
> }
>
> static int net_stream_server_init(NetClientState *peer,
> @@ -295,6 +313,43 @@ static int net_stream_server_init(NetClientState *peer,
> }
> break;
> }
> + case SOCKET_ADDRESS_TYPE_UNIX: {
> + struct sockaddr_un saddr_un;
> +
> + ret = unlink(addr->u.q_unix.path);
> + if (ret < 0 && errno != ENOENT) {
> + error_setg_errno(errp, errno, "failed to unlink socket %s",
> + addr->u.q_unix.path);
> + return -1;
> + }
> +
> + saddr_un.sun_family = PF_UNIX;
> + ret = snprintf(saddr_un.sun_path, sizeof(saddr_un.sun_path), "%s",
> + addr->u.q_unix.path);
> + if (ret < 0 || ret >= sizeof(saddr_un.sun_path)) {
> + error_setg(errp, "UNIX socket path '%s' is too long",
> + addr->u.q_unix.path);
> + error_append_hint(errp, "Path must be less than %zu bytes\n",
> + sizeof(saddr_un.sun_path));
> + return -1;
> + }
> +
> + fd = qemu_socket(PF_UNIX, SOCK_STREAM, 0);
> + if (fd < 0) {
> + error_setg_errno(errp, errno, "can't create stream socket");
> + return -1;
> + }
> + qemu_socket_set_nonblock(fd);
> +
> + ret = bind(fd, (struct sockaddr *)&saddr_un, sizeof(saddr_un));
> + if (ret < 0) {
> + error_setg_errno(errp, errno, "can't create socket with path: %s",
> + saddr_un.sun_path);
> + closesocket(fd);
> + return -1;
> + }
> + break;
> + }
> case SOCKET_ADDRESS_TYPE_FD:
> fd = monitor_fd_param(monitor_cur(), addr->u.fd.str, errp);
> if (fd == -1) {
> @@ -380,6 +435,49 @@ static int net_stream_client_init(NetClientState *peer,
> ntohs(saddr_in.sin_port));
> break;
> }
> + case SOCKET_ADDRESS_TYPE_UNIX: {
> + struct sockaddr_un saddr_un;
> +
> + saddr_un.sun_family = PF_UNIX;
> + ret = snprintf(saddr_un.sun_path, sizeof(saddr_un.sun_path), "%s",
> + addr->u.q_unix.path);
> + if (ret < 0 || ret >= sizeof(saddr_un.sun_path)) {
> + error_setg(errp, "UNIX socket path '%s' is too long",
> + addr->u.q_unix.path);
> + error_append_hint(errp, "Path must be less than %zu bytes\n",
> + sizeof(saddr_un.sun_path));
> + return -1;
> + }
> +
> + fd = qemu_socket(PF_UNIX, SOCK_STREAM, 0);
> + if (fd < 0) {
> + error_setg_errno(errp, errno, "can't create stream socket");
> + return -1;
> + }
> + qemu_socket_set_nonblock(fd);
> +
> + connected = 0;
> + for (;;) {
> + ret = connect(fd, (struct sockaddr *)&saddr_un, sizeof(saddr_un));
> + if (ret < 0) {
> + if (errno == EINTR || errno == EWOULDBLOCK) {
> + /* continue */
> + } else if (errno == EAGAIN ||
> + errno == EALREADY) {
> + break;
> + } else {
> + error_setg_errno(errp, errno, "can't connect socket");
> + closesocket(fd);
> + return -1;
> + }
> + } else {
> + connected = 1;
> + break;
> + }
> + }
> + info_str = g_strdup_printf(" connect to %s", saddr_un.sun_path);
> + break;
> + }
> case SOCKET_ADDRESS_TYPE_FD:
> fd = monitor_fd_param(monitor_cur(), addr->u.fd.str, errp);
> if (fd == -1) {
> @@ -395,7 +493,7 @@ static int net_stream_client_init(NetClientState *peer,
> info_str = g_strdup_printf("connect to fd %d", fd);
> break;
> default:
> - error_setg(errp, "only support inet or fd type");
> + error_setg(errp, "only support inet, unix or fd type");
> return -1;
> }
>
> diff --git a/qapi/net.json b/qapi/net.json
> index e02e8001a000..bb96701a49a7 100644
> --- a/qapi/net.json
> +++ b/qapi/net.json
> @@ -583,7 +583,7 @@
> # or connect to (server=false)
> # @server: create server socket (default: true)
> #
> -# Only SocketAddress types 'inet' and 'fd' are supported.
> +# Only SocketAddress types 'unix', 'inet' and 'fd' are supported.
> #
> # Since: 7.1
> ##
> diff --git a/qemu-options.hx b/qemu-options.hx
> index bb16a61bae8e..8870bcce6bcd 100644
> --- a/qemu-options.hx
> +++ b/qemu-options.hx
> @@ -2733,6 +2733,7 @@ DEF("netdev", HAS_ARG, QEMU_OPTION_netdev,
> " configure a network backend to connect to another network\n"
> " using an UDP tunnel\n"
> "-netdev stream,id=str[,server=on|off],addr.type=inet,addr.host=host,addr.port=port\n"
> + "-netdev stream,id=str[,server=on|off],addr.type=unix,addr.path=path\n"
> "-netdev stream,id=str[,server=on|off],addr.type=fd,addr.str=h\n"
> " configure a network backend to connect to another network\n"
> " using a socket connection in stream mode.\n"
--
David Gibson | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_
| _way_ _around_!
http://www.ozlabs.org/~dgibson
[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 833 bytes --]
^ permalink raw reply [flat|nested] 31+ messages in thread
* Re: [PATCH v8 11/14] qemu-sockets: move and rename SocketAddress_to_str()
2022-09-13 6:39 ` [PATCH v8 11/14] qemu-sockets: move and rename SocketAddress_to_str() Laurent Vivier
@ 2022-09-14 5:23 ` David Gibson
2022-09-14 19:08 ` Dr. David Alan Gilbert
1 sibling, 0 replies; 31+ messages in thread
From: David Gibson @ 2022-09-14 5:23 UTC (permalink / raw)
To: Laurent Vivier
Cc: qemu-devel, Jason Wang, Paolo Bonzini, Gregory Kurz,
Daniel P. Berrangé,
Eric Blake, Markus Armbruster, Thomas Huth,
Dr. David Alan Gilbert
[-- Attachment #1: Type: text/plain, Size: 4405 bytes --]
On Tue, Sep 13, 2022 at 08:39:57AM +0200, Laurent Vivier wrote:
> Rename SocketAddress_to_str() to socket_uri() and move it to
> util/qemu-sockets.c close to socket_parse().
>
> socket_uri() generates a string from a SocketAddress while
> socket_parse() generates a SocketAddress from a string.
>
> Signed-off-by: Laurent Vivier <lvivier@redhat.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
> ---
> include/qemu/sockets.h | 2 +-
> monitor/hmp-cmds.c | 23 +----------------------
> util/qemu-sockets.c | 20 ++++++++++++++++++++
> 3 files changed, 22 insertions(+), 23 deletions(-)
>
> diff --git a/include/qemu/sockets.h b/include/qemu/sockets.h
> index 47194b9732f8..e5a06d2e3729 100644
> --- a/include/qemu/sockets.h
> +++ b/include/qemu/sockets.h
> @@ -40,6 +40,7 @@ NetworkAddressFamily inet_netfamily(int family);
> int unix_listen(const char *path, Error **errp);
> int unix_connect(const char *path, Error **errp);
>
> +char *socket_uri(SocketAddress *addr);
> SocketAddress *socket_parse(const char *str, Error **errp);
> int socket_connect(SocketAddress *addr, Error **errp);
> int socket_listen(SocketAddress *addr, int num, Error **errp);
> @@ -123,5 +124,4 @@ SocketAddress *socket_address_flatten(SocketAddressLegacy *addr);
> * Return 0 on success.
> */
> int socket_address_parse_named_fd(SocketAddress *addr, Error **errp);
> -
> #endif /* QEMU_SOCKETS_H */
> diff --git a/monitor/hmp-cmds.c b/monitor/hmp-cmds.c
> index c6cd6f91dde6..cb35059c2d45 100644
> --- a/monitor/hmp-cmds.c
> +++ b/monitor/hmp-cmds.c
> @@ -197,27 +197,6 @@ void hmp_info_mice(Monitor *mon, const QDict *qdict)
> qapi_free_MouseInfoList(mice_list);
> }
>
> -static char *SocketAddress_to_str(SocketAddress *addr)
> -{
> - switch (addr->type) {
> - case SOCKET_ADDRESS_TYPE_INET:
> - return g_strdup_printf("tcp:%s:%s",
> - addr->u.inet.host,
> - addr->u.inet.port);
> - case SOCKET_ADDRESS_TYPE_UNIX:
> - return g_strdup_printf("unix:%s",
> - addr->u.q_unix.path);
> - case SOCKET_ADDRESS_TYPE_FD:
> - return g_strdup_printf("fd:%s", addr->u.fd.str);
> - case SOCKET_ADDRESS_TYPE_VSOCK:
> - return g_strdup_printf("tcp:%s:%s",
> - addr->u.vsock.cid,
> - addr->u.vsock.port);
> - default:
> - return g_strdup("unknown address type");
> - }
> -}
> -
> void hmp_info_migrate(Monitor *mon, const QDict *qdict)
> {
> MigrationInfo *info;
> @@ -380,7 +359,7 @@ void hmp_info_migrate(Monitor *mon, const QDict *qdict)
> monitor_printf(mon, "socket address: [\n");
>
> for (addr = info->socket_address; addr; addr = addr->next) {
> - char *s = SocketAddress_to_str(addr->value);
> + char *s = socket_uri(addr->value);
> monitor_printf(mon, "\t%s\n", s);
> g_free(s);
> }
> diff --git a/util/qemu-sockets.c b/util/qemu-sockets.c
> index 83f4bd6fd211..9f6f655fd526 100644
> --- a/util/qemu-sockets.c
> +++ b/util/qemu-sockets.c
> @@ -1077,6 +1077,26 @@ int unix_connect(const char *path, Error **errp)
> return sock;
> }
>
> +char *socket_uri(SocketAddress *addr)
> +{
> + switch (addr->type) {
> + case SOCKET_ADDRESS_TYPE_INET:
> + return g_strdup_printf("tcp:%s:%s",
> + addr->u.inet.host,
> + addr->u.inet.port);
> + case SOCKET_ADDRESS_TYPE_UNIX:
> + return g_strdup_printf("unix:%s",
> + addr->u.q_unix.path);
> + case SOCKET_ADDRESS_TYPE_FD:
> + return g_strdup_printf("fd:%s", addr->u.fd.str);
> + case SOCKET_ADDRESS_TYPE_VSOCK:
> + return g_strdup_printf("tcp:%s:%s",
> + addr->u.vsock.cid,
> + addr->u.vsock.port);
> + default:
> + return g_strdup("unknown address type");
> + }
> +}
>
> SocketAddress *socket_parse(const char *str, Error **errp)
> {
--
David Gibson | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_
| _way_ _around_!
http://www.ozlabs.org/~dgibson
[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 833 bytes --]
^ permalink raw reply [flat|nested] 31+ messages in thread
* Re: [PATCH v8 12/14] qemu-sockets: update socket_uri() and socket_parse() to be consistent
2022-09-13 6:39 ` [PATCH v8 12/14] qemu-sockets: update socket_uri() and socket_parse() to be consistent Laurent Vivier
@ 2022-09-14 19:06 ` Dr. David Alan Gilbert
2022-09-21 15:01 ` Markus Armbruster
1 sibling, 0 replies; 31+ messages in thread
From: Dr. David Alan Gilbert @ 2022-09-14 19:06 UTC (permalink / raw)
To: Laurent Vivier
Cc: qemu-devel, Jason Wang, Paolo Bonzini, Gregory Kurz,
Daniel P. Berrangé,
Eric Blake, Markus Armbruster, Thomas Huth, David Gibson
* Laurent Vivier (lvivier@redhat.com) wrote:
> To be consistent with socket_uri(), add 'tcp:' prefix for inet type in
> socket_parse(), by default socket_parse() use tcp when no prefix is
> provided (format is host:port).
>
> In socket_uri(), use 'vsock:' prefix for vsock type rather than 'tcp:'
> because it makes a vsock address look like an inet address with CID
> misinterpreted as host.
> Goes back to commit 9aca82ba31 "migration: Create socket-address parameter"
>
> Signed-off-by: Laurent Vivier <lvivier@redhat.com>
Yeh I think that's safer than the last version for migrate URIs
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
> ---
> util/qemu-sockets.c | 7 ++++++-
> 1 file changed, 6 insertions(+), 1 deletion(-)
>
> diff --git a/util/qemu-sockets.c b/util/qemu-sockets.c
> index 9f6f655fd526..a9926af714c4 100644
> --- a/util/qemu-sockets.c
> +++ b/util/qemu-sockets.c
> @@ -1090,7 +1090,7 @@ char *socket_uri(SocketAddress *addr)
> case SOCKET_ADDRESS_TYPE_FD:
> return g_strdup_printf("fd:%s", addr->u.fd.str);
> case SOCKET_ADDRESS_TYPE_VSOCK:
> - return g_strdup_printf("tcp:%s:%s",
> + return g_strdup_printf("vsock:%s:%s",
> addr->u.vsock.cid,
> addr->u.vsock.port);
> default:
> @@ -1124,6 +1124,11 @@ SocketAddress *socket_parse(const char *str, Error **errp)
> if (vsock_parse(&addr->u.vsock, str + strlen("vsock:"), errp)) {
> goto fail;
> }
> + } else if (strstart(str, "tcp:", NULL)) {
> + addr->type = SOCKET_ADDRESS_TYPE_INET;
> + if (inet_parse(&addr->u.inet, str + strlen("tcp:"), errp)) {
> + goto fail;
> + }
> } else {
> addr->type = SOCKET_ADDRESS_TYPE_INET;
> if (inet_parse(&addr->u.inet, str, errp)) {
> --
> 2.37.3
>
--
Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK
^ permalink raw reply [flat|nested] 31+ messages in thread
* Re: [PATCH v8 11/14] qemu-sockets: move and rename SocketAddress_to_str()
2022-09-13 6:39 ` [PATCH v8 11/14] qemu-sockets: move and rename SocketAddress_to_str() Laurent Vivier
2022-09-14 5:23 ` David Gibson
@ 2022-09-14 19:08 ` Dr. David Alan Gilbert
1 sibling, 0 replies; 31+ messages in thread
From: Dr. David Alan Gilbert @ 2022-09-14 19:08 UTC (permalink / raw)
To: Laurent Vivier
Cc: qemu-devel, Jason Wang, Paolo Bonzini, Gregory Kurz,
Daniel P. Berrangé,
Eric Blake, Markus Armbruster, Thomas Huth, David Gibson
* Laurent Vivier (lvivier@redhat.com) wrote:
> Rename SocketAddress_to_str() to socket_uri() and move it to
> util/qemu-sockets.c close to socket_parse().
>
> socket_uri() generates a string from a SocketAddress while
> socket_parse() generates a SocketAddress from a string.
>
> Signed-off-by: Laurent Vivier <lvivier@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
> ---
> include/qemu/sockets.h | 2 +-
> monitor/hmp-cmds.c | 23 +----------------------
> util/qemu-sockets.c | 20 ++++++++++++++++++++
> 3 files changed, 22 insertions(+), 23 deletions(-)
>
> diff --git a/include/qemu/sockets.h b/include/qemu/sockets.h
> index 47194b9732f8..e5a06d2e3729 100644
> --- a/include/qemu/sockets.h
> +++ b/include/qemu/sockets.h
> @@ -40,6 +40,7 @@ NetworkAddressFamily inet_netfamily(int family);
> int unix_listen(const char *path, Error **errp);
> int unix_connect(const char *path, Error **errp);
>
> +char *socket_uri(SocketAddress *addr);
> SocketAddress *socket_parse(const char *str, Error **errp);
> int socket_connect(SocketAddress *addr, Error **errp);
> int socket_listen(SocketAddress *addr, int num, Error **errp);
> @@ -123,5 +124,4 @@ SocketAddress *socket_address_flatten(SocketAddressLegacy *addr);
> * Return 0 on success.
> */
> int socket_address_parse_named_fd(SocketAddress *addr, Error **errp);
> -
> #endif /* QEMU_SOCKETS_H */
> diff --git a/monitor/hmp-cmds.c b/monitor/hmp-cmds.c
> index c6cd6f91dde6..cb35059c2d45 100644
> --- a/monitor/hmp-cmds.c
> +++ b/monitor/hmp-cmds.c
> @@ -197,27 +197,6 @@ void hmp_info_mice(Monitor *mon, const QDict *qdict)
> qapi_free_MouseInfoList(mice_list);
> }
>
> -static char *SocketAddress_to_str(SocketAddress *addr)
> -{
> - switch (addr->type) {
> - case SOCKET_ADDRESS_TYPE_INET:
> - return g_strdup_printf("tcp:%s:%s",
> - addr->u.inet.host,
> - addr->u.inet.port);
> - case SOCKET_ADDRESS_TYPE_UNIX:
> - return g_strdup_printf("unix:%s",
> - addr->u.q_unix.path);
> - case SOCKET_ADDRESS_TYPE_FD:
> - return g_strdup_printf("fd:%s", addr->u.fd.str);
> - case SOCKET_ADDRESS_TYPE_VSOCK:
> - return g_strdup_printf("tcp:%s:%s",
> - addr->u.vsock.cid,
> - addr->u.vsock.port);
> - default:
> - return g_strdup("unknown address type");
> - }
> -}
> -
> void hmp_info_migrate(Monitor *mon, const QDict *qdict)
> {
> MigrationInfo *info;
> @@ -380,7 +359,7 @@ void hmp_info_migrate(Monitor *mon, const QDict *qdict)
> monitor_printf(mon, "socket address: [\n");
>
> for (addr = info->socket_address; addr; addr = addr->next) {
> - char *s = SocketAddress_to_str(addr->value);
> + char *s = socket_uri(addr->value);
> monitor_printf(mon, "\t%s\n", s);
> g_free(s);
> }
> diff --git a/util/qemu-sockets.c b/util/qemu-sockets.c
> index 83f4bd6fd211..9f6f655fd526 100644
> --- a/util/qemu-sockets.c
> +++ b/util/qemu-sockets.c
> @@ -1077,6 +1077,26 @@ int unix_connect(const char *path, Error **errp)
> return sock;
> }
>
> +char *socket_uri(SocketAddress *addr)
> +{
> + switch (addr->type) {
> + case SOCKET_ADDRESS_TYPE_INET:
> + return g_strdup_printf("tcp:%s:%s",
> + addr->u.inet.host,
> + addr->u.inet.port);
> + case SOCKET_ADDRESS_TYPE_UNIX:
> + return g_strdup_printf("unix:%s",
> + addr->u.q_unix.path);
> + case SOCKET_ADDRESS_TYPE_FD:
> + return g_strdup_printf("fd:%s", addr->u.fd.str);
> + case SOCKET_ADDRESS_TYPE_VSOCK:
> + return g_strdup_printf("tcp:%s:%s",
> + addr->u.vsock.cid,
> + addr->u.vsock.port);
> + default:
> + return g_strdup("unknown address type");
> + }
> +}
>
> SocketAddress *socket_parse(const char *str, Error **errp)
> {
> --
> 2.37.3
>
--
Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK
^ permalink raw reply [flat|nested] 31+ messages in thread
* Re: [PATCH v8 13/14] net: stream: move to QIO
2022-09-13 6:39 ` [PATCH v8 13/14] net: stream: move to QIO Laurent Vivier
@ 2022-09-21 14:58 ` Markus Armbruster
2022-09-22 9:13 ` Laurent Vivier
0 siblings, 1 reply; 31+ messages in thread
From: Markus Armbruster @ 2022-09-21 14:58 UTC (permalink / raw)
To: Laurent Vivier
Cc: qemu-devel, Jason Wang, Paolo Bonzini, Gregory Kurz,
Daniel P. Berrangé,
Eric Blake, Thomas Huth, David Gibson, Dr. David Alan Gilbert
Laurent Vivier <lvivier@redhat.com> writes:
> Use QIOChannel, QIOChannelSocket and QIONetListener.
>
> Signed-off-by: Laurent Vivier <lvivier@redhat.com>
> ---
[...]
> diff --git a/qemu-options.hx b/qemu-options.hx
> index ee2436ae14a7..a0b5b70c80cb 100644
> --- a/qemu-options.hx
> +++ b/qemu-options.hx
> @@ -2732,8 +2732,8 @@ DEF("netdev", HAS_ARG, QEMU_OPTION_netdev,
> "-netdev socket,id=str[,fd=h][,udp=host:port][,localaddr=host:port]\n"
> " configure a network backend to connect to another network\n"
> " using an UDP tunnel\n"
> - "-netdev stream,id=str[,server=on|off],addr.type=inet,addr.host=host,addr.port=port\n"
> - "-netdev stream,id=str[,server=on|off],addr.type=unix,addr.path=path\n"
> + "-netdev stream,id=str[,server=on|off],addr.type=inet,addr.host=host,addr.port=port[,to=maxport][,numeric=on|off][,keep-alive=on|off][,mptcp=on|off][,addr.ipv4=on|off][,addr.ipv6=on|off]\n"
> + "-netdev stream,id=str[,server=on|off],addr.type=unix,addr.path=path[,abstract=on|off][,tight=on|off]\n"
> "-netdev stream,id=str[,server=on|off],addr.type=fd,addr.str=h\n"
> " configure a network backend to connect to another network\n"
> " using a socket connection in stream mode.\n"
The commit message didn't prepare me for this change. Could you
explain?
^ permalink raw reply [flat|nested] 31+ messages in thread
* Re: [PATCH v8 12/14] qemu-sockets: update socket_uri() and socket_parse() to be consistent
2022-09-13 6:39 ` [PATCH v8 12/14] qemu-sockets: update socket_uri() and socket_parse() to be consistent Laurent Vivier
2022-09-14 19:06 ` Dr. David Alan Gilbert
@ 2022-09-21 15:01 ` Markus Armbruster
1 sibling, 0 replies; 31+ messages in thread
From: Markus Armbruster @ 2022-09-21 15:01 UTC (permalink / raw)
To: Laurent Vivier
Cc: qemu-devel, Jason Wang, Paolo Bonzini, Gregory Kurz,
Daniel P. Berrangé,
Eric Blake, Thomas Huth, David Gibson, Dr. David Alan Gilbert
Laurent Vivier <lvivier@redhat.com> writes:
> To be consistent with socket_uri(), add 'tcp:' prefix for inet type in
> socket_parse(), by default socket_parse() use tcp when no prefix is
> provided (format is host:port).
>
> In socket_uri(), use 'vsock:' prefix for vsock type rather than 'tcp:'
> because it makes a vsock address look like an inet address with CID
> misinterpreted as host.
> Goes back to commit 9aca82ba31 "migration: Create socket-address parameter"
>
> Signed-off-by: Laurent Vivier <lvivier@redhat.com>
> ---
> util/qemu-sockets.c | 7 ++++++-
> 1 file changed, 6 insertions(+), 1 deletion(-)
>
> diff --git a/util/qemu-sockets.c b/util/qemu-sockets.c
> index 9f6f655fd526..a9926af714c4 100644
> --- a/util/qemu-sockets.c
> +++ b/util/qemu-sockets.c
> @@ -1090,7 +1090,7 @@ char *socket_uri(SocketAddress *addr)
> case SOCKET_ADDRESS_TYPE_FD:
> return g_strdup_printf("fd:%s", addr->u.fd.str);
> case SOCKET_ADDRESS_TYPE_VSOCK:
> - return g_strdup_printf("tcp:%s:%s",
> + return g_strdup_printf("vsock:%s:%s",
> addr->u.vsock.cid,
> addr->u.vsock.port);
> default:
> @@ -1124,6 +1124,11 @@ SocketAddress *socket_parse(const char *str, Error **errp)
> if (vsock_parse(&addr->u.vsock, str + strlen("vsock:"), errp)) {
> goto fail;
> }
> + } else if (strstart(str, "tcp:", NULL)) {
> + addr->type = SOCKET_ADDRESS_TYPE_INET;
> + if (inet_parse(&addr->u.inet, str + strlen("tcp:"), errp)) {
> + goto fail;
> + }
> } else {
> addr->type = SOCKET_ADDRESS_TYPE_INET;
> if (inet_parse(&addr->u.inet, str, errp)) {
I'd be tempted to split this patch, but I'm a compulsive patch splitter
;)
Reviewed-by: Markus Armbruster <armbru@redhat.com>
^ permalink raw reply [flat|nested] 31+ messages in thread
* Re: [PATCH v8 13/14] net: stream: move to QIO
2022-09-21 14:58 ` Markus Armbruster
@ 2022-09-22 9:13 ` Laurent Vivier
2022-09-22 9:40 ` Markus Armbruster
0 siblings, 1 reply; 31+ messages in thread
From: Laurent Vivier @ 2022-09-22 9:13 UTC (permalink / raw)
To: Markus Armbruster
Cc: qemu-devel, Jason Wang, Paolo Bonzini, Gregory Kurz,
Daniel P. Berrangé,
Eric Blake, Thomas Huth, David Gibson, Dr. David Alan Gilbert
On 9/21/22 16:58, Markus Armbruster wrote:
> Laurent Vivier <lvivier@redhat.com> writes:
>
>> Use QIOChannel, QIOChannelSocket and QIONetListener.
>>
>> Signed-off-by: Laurent Vivier <lvivier@redhat.com>
>> ---
>
> [...]
>
>> diff --git a/qemu-options.hx b/qemu-options.hx
>> index ee2436ae14a7..a0b5b70c80cb 100644
>> --- a/qemu-options.hx
>> +++ b/qemu-options.hx
>> @@ -2732,8 +2732,8 @@ DEF("netdev", HAS_ARG, QEMU_OPTION_netdev,
>> "-netdev socket,id=str[,fd=h][,udp=host:port][,localaddr=host:port]\n"
>> " configure a network backend to connect to another network\n"
>> " using an UDP tunnel\n"
>> - "-netdev stream,id=str[,server=on|off],addr.type=inet,addr.host=host,addr.port=port\n"
>> - "-netdev stream,id=str[,server=on|off],addr.type=unix,addr.path=path\n"
>> + "-netdev stream,id=str[,server=on|off],addr.type=inet,addr.host=host,addr.port=port[,to=maxport][,numeric=on|off][,keep-alive=on|off][,mptcp=on|off][,addr.ipv4=on|off][,addr.ipv6=on|off]\n"
>> + "-netdev stream,id=str[,server=on|off],addr.type=unix,addr.path=path[,abstract=on|off][,tight=on|off]\n"
>> "-netdev stream,id=str[,server=on|off],addr.type=fd,addr.str=h\n"
>> " configure a network backend to connect to another network\n"
>> " using a socket connection in stream mode.\n"
>
> The commit message didn't prepare me for this change. Could you
> explain?
>
You're right, I should explain:
moving to QIOChannel allows net/stream to use the all the available parameters provided by
SocketAddress. They were not listed here before because they were not supported, and as
they are supported now I have added them in the list.
Thanks,
Laurent
^ permalink raw reply [flat|nested] 31+ messages in thread
* Re: [PATCH v8 13/14] net: stream: move to QIO
2022-09-22 9:13 ` Laurent Vivier
@ 2022-09-22 9:40 ` Markus Armbruster
0 siblings, 0 replies; 31+ messages in thread
From: Markus Armbruster @ 2022-09-22 9:40 UTC (permalink / raw)
To: Laurent Vivier
Cc: qemu-devel, Jason Wang, Paolo Bonzini, Gregory Kurz,
Daniel P. Berrangé,
Eric Blake, Thomas Huth, David Gibson, Dr. David Alan Gilbert
Laurent Vivier <lvivier@redhat.com> writes:
> On 9/21/22 16:58, Markus Armbruster wrote:
>> Laurent Vivier <lvivier@redhat.com> writes:
>>
>>> Use QIOChannel, QIOChannelSocket and QIONetListener.
>>>
>>> Signed-off-by: Laurent Vivier <lvivier@redhat.com>
>>> ---
>> [...]
>>
>>> diff --git a/qemu-options.hx b/qemu-options.hx
>>> index ee2436ae14a7..a0b5b70c80cb 100644
>>> --- a/qemu-options.hx
>>> +++ b/qemu-options.hx
>>> @@ -2732,8 +2732,8 @@ DEF("netdev", HAS_ARG, QEMU_OPTION_netdev,
>>> "-netdev socket,id=str[,fd=h][,udp=host:port][,localaddr=host:port]\n"
>>> " configure a network backend to connect to another network\n"
>>> " using an UDP tunnel\n"
>>> - "-netdev stream,id=str[,server=on|off],addr.type=inet,addr.host=host,addr.port=port\n"
>>> - "-netdev stream,id=str[,server=on|off],addr.type=unix,addr.path=path\n"
>>> + "-netdev stream,id=str[,server=on|off],addr.type=inet,addr.host=host,addr.port=port[,to=maxport][,numeric=on|off][,keep-alive=on|off][,mptcp=on|off][,addr.ipv4=on|off][,addr.ipv6=on|off]\n"
>>> + "-netdev stream,id=str[,server=on|off],addr.type=unix,addr.path=path[,abstract=on|off][,tight=on|off]\n"
>>> "-netdev stream,id=str[,server=on|off],addr.type=fd,addr.str=h\n"
>>> " configure a network backend to connect to another network\n"
>>> " using a socket connection in stream mode.\n"
>> The commit message didn't prepare me for this change. Could you
>> explain?
>>
>
> You're right, I should explain:
>
> moving to QIOChannel allows net/stream to use the all the available parameters provided by SocketAddress. They were not listed here before because they were not supported, and as
> they are supported now I have added them in the list.
Fine addition to the commit message. Suggest to amend its subject like
net stream: move to QIO to enable additional parameters
or
net stream: move to QIO, enabling additional parameters
^ permalink raw reply [flat|nested] 31+ messages in thread
* Re: [PATCH v8 06/14] net: stream: Don't ignore EINVAL on netdev socket connection
2022-09-14 5:05 ` David Gibson
@ 2022-09-23 14:58 ` Laurent Vivier
0 siblings, 0 replies; 31+ messages in thread
From: Laurent Vivier @ 2022-09-23 14:58 UTC (permalink / raw)
To: David Gibson
Cc: qemu-devel, Jason Wang, Paolo Bonzini, Gregory Kurz,
Daniel P. Berrangé,
Eric Blake, Markus Armbruster, Thomas Huth,
Dr. David Alan Gilbert, Stefano Brivio
On 9/14/22 07:05, David Gibson wrote:
> On Tue, Sep 13, 2022 at 08:39:52AM +0200, Laurent Vivier wrote:
>> From: Stefano Brivio <sbrivio@redhat.com>
>>
>> Other errors are treated as failure by net_stream_client_init(),
>> but if connect() returns EINVAL, we'll fail silently. Remove the
>> related exception.
>
> Is this also a bug in net_socket_connect_init()? Is there an
> equivalent bug in dgram.c?
Yes, the bug has been found by Stefano in socket.c, I'm adding his patch to the series.
There is no equivalent bug in dgram.c
Thanks,
Laurent
^ permalink raw reply [flat|nested] 31+ messages in thread
* Re: [PATCH v8 07/14] net: stream: add unix socket
2022-09-14 5:16 ` David Gibson
@ 2022-09-26 12:15 ` Laurent Vivier
0 siblings, 0 replies; 31+ messages in thread
From: Laurent Vivier @ 2022-09-26 12:15 UTC (permalink / raw)
To: David Gibson
Cc: qemu-devel, Jason Wang, Paolo Bonzini, Gregory Kurz,
Daniel P. Berrangé,
Eric Blake, Markus Armbruster, Thomas Huth,
Dr. David Alan Gilbert, Stefano Brivio
On 9/14/22 07:16, David Gibson wrote:
> On Tue, Sep 13, 2022 at 08:39:53AM +0200, Laurent Vivier wrote:
>> Signed-off-by: Laurent Vivier <lvivier@redhat.com>
>> Reviewed-by: Stefano Brivio <sbrivio@redhat.com>
>> ---
>> net/stream.c | 108 +++++++++++++++++++++++++++++++++++++++++++++---
>> qapi/net.json | 2 +-
>> qemu-options.hx | 1 +
>> 3 files changed, 105 insertions(+), 6 deletions(-)
>>
>> diff --git a/net/stream.c b/net/stream.c
>> index e8afbaca50b6..0f91ff20df61 100644
>> --- a/net/stream.c
>> +++ b/net/stream.c
>> @@ -235,7 +235,7 @@ static NetStreamState *net_stream_fd_init_stream(NetClientState *peer,
>> static void net_stream_accept(void *opaque)
>> {
>> NetStreamState *s = opaque;
>> - struct sockaddr_in saddr;
>> + struct sockaddr_storage saddr;
>> socklen_t len;
>> int fd;
>>
>> @@ -253,9 +253,27 @@ static void net_stream_accept(void *opaque)
>> s->fd = fd;
>> s->nc.link_down = false;
>> net_stream_connect(s);
>> - snprintf(s->nc.info_str, sizeof(s->nc.info_str),
>> - "connection from %s:%d",
>> - inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
>> + switch (saddr.ss_family) {
>> + case AF_INET: {
>> + struct sockaddr_in *saddr_in = (struct sockaddr_in *)&saddr;
>> +
>> + snprintf(s->nc.info_str, sizeof(s->nc.info_str),
>> + "connection from %s:%d",
>> + inet_ntoa(saddr_in->sin_addr), ntohs(saddr_in->sin_port));
>> + break;
>> + }
>> + case AF_UNIX: {
>> + struct sockaddr_un saddr_un;
>> +
>> + len = sizeof(saddr_un);
>> + getsockname(s->listen_fd, (struct sockaddr *)&saddr_un, &len);
>
> It seems like there's an asymmetry here in that we've gotten the
> connection address outside the switch for inet sockets, but we need an
> additional getsockname() for unix sockets. Am I missing something?
>
This is because unix socket are not symmetric.
connect() returns the peer socket address.
With inet, server is waiting on, for instance, 127.0.0.1:1234 and peer address will appear
to be something like 127.0.0.1:33946. So info_str will be set with "127.0.0.1:33946".
In case of unix, server is waiting on, for instance, /tmp/qemu0 and there is no peer
address as the client connect to this same file. So the sun_path is empty when it returns
from accept(). So to set the path of the socket (sun_path) in info_str I use the
getsockname() to retrieve the server sun_path.
Thanks,
Laurent
^ permalink raw reply [flat|nested] 31+ messages in thread
end of thread, other threads:[~2022-09-26 12:25 UTC | newest]
Thread overview: 31+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2022-09-13 6:39 [PATCH v8 00/14] qapi: net: add unix socket type support to netdev backend Laurent Vivier
2022-09-13 6:39 ` [PATCH v8 01/14] net: introduce convert_host_port() Laurent Vivier
2022-09-14 2:26 ` David Gibson
2022-09-13 6:39 ` [PATCH v8 02/14] net: remove the @errp argument of net_client_inits() Laurent Vivier
2022-09-14 2:28 ` David Gibson
2022-09-13 6:39 ` [PATCH v8 03/14] net: simplify net_client_parse() error management Laurent Vivier
2022-09-14 2:29 ` David Gibson
2022-09-13 6:39 ` [PATCH v8 04/14] qapi: net: introduce a way to bypass qemu_opts_parse_noisily() Laurent Vivier
2022-09-13 6:39 ` [PATCH v8 05/14] qapi: net: add stream and dgram netdevs Laurent Vivier
2022-09-14 5:03 ` David Gibson
2022-09-13 6:39 ` [PATCH v8 06/14] net: stream: Don't ignore EINVAL on netdev socket connection Laurent Vivier
2022-09-14 5:05 ` David Gibson
2022-09-23 14:58 ` Laurent Vivier
2022-09-13 6:39 ` [PATCH v8 07/14] net: stream: add unix socket Laurent Vivier
2022-09-14 5:16 ` David Gibson
2022-09-26 12:15 ` Laurent Vivier
2022-09-13 6:39 ` [PATCH v8 08/14] net: dgram: make dgram_dst generic Laurent Vivier
2022-09-13 6:39 ` [PATCH v8 09/14] net: dgram: move mcast specific code from net_socket_fd_init_dgram() Laurent Vivier
2022-09-13 6:39 ` [PATCH v8 10/14] net: dgram: add unix socket Laurent Vivier
2022-09-13 6:39 ` [PATCH v8 11/14] qemu-sockets: move and rename SocketAddress_to_str() Laurent Vivier
2022-09-14 5:23 ` David Gibson
2022-09-14 19:08 ` Dr. David Alan Gilbert
2022-09-13 6:39 ` [PATCH v8 12/14] qemu-sockets: update socket_uri() and socket_parse() to be consistent Laurent Vivier
2022-09-14 19:06 ` Dr. David Alan Gilbert
2022-09-21 15:01 ` Markus Armbruster
2022-09-13 6:39 ` [PATCH v8 13/14] net: stream: move to QIO Laurent Vivier
2022-09-21 14:58 ` Markus Armbruster
2022-09-22 9:13 ` Laurent Vivier
2022-09-22 9:40 ` Markus Armbruster
2022-09-13 6:40 ` [PATCH v8 14/14] tests/qtest: netdev: test stream and dgram backends Laurent Vivier
2022-09-13 10:24 ` [PATCH v8 00/14] qapi: net: add unix socket type support to netdev backend Stefano Brivio
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.