| Message ID | 20230105131322.469173-1-lvivier@redhat.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [v3] net: stream: add a new option to automatically reconnect | expand |
ping On 1/5/23 14:13, Laurent Vivier wrote: > In stream mode, if the server shuts down there is currently > no way to reconnect the client to a new server without removing > the NIC device and the netdev backend (or to reboot). > > This patch introduces a reconnect option that specifies a delay > to try to reconnect with the same parameters. > > Add a new test in qtest to test the reconnect option and the > connect/disconnect events. > > Signed-off-by: Laurent Vivier <lvivier@redhat.com> > --- > Based-on: <20230105093751.416666-1-lvivier@redhat.com> > > v3: > - add "since 8.0" in net.json > > v2: > - rebase > > net/stream.c | 53 ++++++++++++++++++- > qapi/net.json | 7 ++- > qemu-options.hx | 6 +-- > tests/qtest/netdev-socket.c | 100 ++++++++++++++++++++++++++++++++++++ > 4 files changed, 161 insertions(+), 5 deletions(-) > > diff --git a/net/stream.c b/net/stream.c > index 37ff727e0c42..9204b4c96e40 100644 > --- a/net/stream.c > +++ b/net/stream.c > @@ -39,6 +39,8 @@ > #include "io/channel-socket.h" > #include "io/net-listener.h" > #include "qapi/qapi-events-net.h" > +#include "qapi/qapi-visit-sockets.h" > +#include "qapi/clone-visitor.h" > > typedef struct NetStreamState { > NetClientState nc; > @@ -49,11 +51,15 @@ typedef struct NetStreamState { > guint ioc_write_tag; > SocketReadState rs; > unsigned int send_index; /* number of bytes sent*/ > + uint32_t reconnect; > + guint timer_tag; > + SocketAddress *addr; > } NetStreamState; > > static void net_stream_listen(QIONetListener *listener, > QIOChannelSocket *cioc, > void *opaque); > +static void net_stream_arm_reconnect(NetStreamState *s); > > static gboolean net_stream_writable(QIOChannel *ioc, > GIOCondition condition, > @@ -170,6 +176,7 @@ static gboolean net_stream_send(QIOChannel *ioc, > qemu_set_info_str(&s->nc, "%s", ""); > > qapi_event_send_netdev_stream_disconnected(s->nc.name); > + net_stream_arm_reconnect(s); > > return G_SOURCE_REMOVE; > } > @@ -187,6 +194,14 @@ static gboolean net_stream_send(QIOChannel *ioc, > static void net_stream_cleanup(NetClientState *nc) > { > NetStreamState *s = DO_UPCAST(NetStreamState, nc, nc); > + if (s->timer_tag) { > + g_source_remove(s->timer_tag); > + s->timer_tag = 0; > + } > + if (s->addr) { > + qapi_free_SocketAddress(s->addr); > + s->addr = NULL; > + } > if (s->ioc) { > if (QIO_CHANNEL_SOCKET(s->ioc)->fd != -1) { > if (s->ioc_read_tag) { > @@ -346,12 +361,37 @@ static void net_stream_client_connected(QIOTask *task, gpointer opaque) > error: > object_unref(OBJECT(s->ioc)); > s->ioc = NULL; > + net_stream_arm_reconnect(s); > +} > + > +static gboolean net_stream_reconnect(gpointer data) > +{ > + NetStreamState *s = data; > + QIOChannelSocket *sioc; > + > + s->timer_tag = 0; > + > + sioc = qio_channel_socket_new(); > + s->ioc = QIO_CHANNEL(sioc); > + qio_channel_socket_connect_async(sioc, s->addr, > + net_stream_client_connected, s, > + NULL, NULL); > + return G_SOURCE_REMOVE; > +} > + > +static void net_stream_arm_reconnect(NetStreamState *s) > +{ > + if (s->reconnect && s->timer_tag == 0) { > + s->timer_tag = g_timeout_add_seconds(s->reconnect, > + net_stream_reconnect, s); > + } > } > > static int net_stream_client_init(NetClientState *peer, > const char *model, > const char *name, > SocketAddress *addr, > + uint32_t reconnect, > Error **errp) > { > NetStreamState *s; > @@ -364,6 +404,10 @@ static int net_stream_client_init(NetClientState *peer, > s->ioc = QIO_CHANNEL(sioc); > s->nc.link_down = true; > > + s->reconnect = reconnect; > + if (reconnect) { > + s->addr = QAPI_CLONE(SocketAddress, addr); > + } > qio_channel_socket_connect_async(sioc, addr, > net_stream_client_connected, s, > NULL, NULL); > @@ -380,7 +424,14 @@ int net_init_stream(const Netdev *netdev, const char *name, > sock = &netdev->u.stream; > > if (!sock->has_server || !sock->server) { > - return net_stream_client_init(peer, "stream", name, sock->addr, errp); > + return net_stream_client_init(peer, "stream", name, sock->addr, > + sock->has_reconnect ? sock->reconnect : 0, > + errp); > + } > + if (sock->has_reconnect) { > + error_setg(errp, "'reconnect' option is incompatible with " > + "socket in server mode"); > + return -1; > } > return net_stream_server_init(peer, "stream", name, sock->addr, errp); > } > diff --git a/qapi/net.json b/qapi/net.json > index 522ac582edeb..d6eb30008be0 100644 > --- a/qapi/net.json > +++ b/qapi/net.json > @@ -585,6 +585,10 @@ > # @addr: socket address to listen on (server=true) > # or connect to (server=false) > # @server: create server socket (default: false) > +# @reconnect: For a client socket, if a socket is disconnected, > +# then attempt a reconnect after the given number of seconds. > +# Setting this to zero disables this function. (default: 0) > +# (since 8.0) > # > # Only SocketAddress types 'unix', 'inet' and 'fd' are supported. > # > @@ -593,7 +597,8 @@ > { 'struct': 'NetdevStreamOptions', > 'data': { > 'addr': 'SocketAddress', > - '*server': 'bool' } } > + '*server': 'bool', > + '*reconnect': 'uint32' } } > > ## > # @NetdevDgramOptions: > diff --git a/qemu-options.hx b/qemu-options.hx > index 7f99d15b231f..e8d3a384e165 100644 > --- a/qemu-options.hx > +++ b/qemu-options.hx > @@ -2766,9 +2766,9 @@ 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[,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=file-descriptor\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][,reconnect=seconds]\n" > + "-netdev stream,id=str[,server=on|off],addr.type=unix,addr.path=path[,abstract=on|off][,tight=on|off][,reconnect=seconds]\n" > + "-netdev stream,id=str[,server=on|off],addr.type=fd,addr.str=file-descriptor[,reconnect=seconds]\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" > diff --git a/tests/qtest/netdev-socket.c b/tests/qtest/netdev-socket.c > index a9db9fa06e79..b6db396599ae 100644 > --- a/tests/qtest/netdev-socket.c > +++ b/tests/qtest/netdev-socket.c > @@ -10,6 +10,10 @@ > #include <glib/gstdio.h> > #include "../unit/socket-helpers.h" > #include "libqtest.h" > +#include "qapi/qmp/qstring.h" > +#include "qemu/sockets.h" > +#include "qapi/qobject-input-visitor.h" > +#include "qapi/qapi-visit-sockets.h" > > #define CONNECTION_TIMEOUT 5 > > @@ -141,6 +145,101 @@ static void test_stream_inet_ipv4(void) > qtest_quit(qts0); > } > > +static void wait_stream_connected(QTestState *qts, const char *id, > + SocketAddress **addr) > +{ > + QDict *resp, *data; > + QString *qstr; > + QObject *obj; > + Visitor *v = NULL; > + > + resp = qtest_qmp_eventwait_ref(qts, "NETDEV_STREAM_CONNECTED"); > + g_assert_nonnull(resp); > + data = qdict_get_qdict(resp, "data"); > + g_assert_nonnull(data); > + > + qstr = qobject_to(QString, qdict_get(data, "netdev-id")); > + g_assert_nonnull(data); > + > + g_assert(!strcmp(qstring_get_str(qstr), id)); > + > + obj = qdict_get(data, "addr"); > + > + v = qobject_input_visitor_new(obj); > + visit_type_SocketAddress(v, NULL, addr, NULL); > + visit_free(v); > + qobject_unref(resp); > +} > + > +static void wait_stream_disconnected(QTestState *qts, const char *id) > +{ > + QDict *resp, *data; > + QString *qstr; > + > + resp = qtest_qmp_eventwait_ref(qts, "NETDEV_STREAM_DISCONNECTED"); > + g_assert_nonnull(resp); > + data = qdict_get_qdict(resp, "data"); > + g_assert_nonnull(data); > + > + qstr = qobject_to(QString, qdict_get(data, "netdev-id")); > + g_assert_nonnull(data); > + > + g_assert(!strcmp(qstring_get_str(qstr), id)); > + qobject_unref(resp); > +} > + > +static void test_stream_inet_reconnect(void) > +{ > + QTestState *qts0, *qts1; > + int port; > + SocketAddress *addr; > + > + port = inet_get_free_port(false); > + qts0 = qtest_initf("-nodefaults -M none " > + "-netdev stream,id=st0,server=true,addr.type=inet," > + "addr.ipv4=on,addr.ipv6=off," > + "addr.host=127.0.0.1,addr.port=%d", port); > + > + EXPECT_STATE(qts0, "st0: index=0,type=stream,\r\n", 0); > + > + qts1 = qtest_initf("-nodefaults -M none " > + "-netdev stream,server=false,id=st0,addr.type=inet," > + "addr.ipv4=on,addr.ipv6=off,reconnect=1," > + "addr.host=127.0.0.1,addr.port=%d", port); > + > + wait_stream_connected(qts0, "st0", &addr); > + g_assert_cmpint(addr->type, ==, SOCKET_ADDRESS_TYPE_INET); > + g_assert_cmpstr(addr->u.inet.host, ==, "127.0.0.1"); > + qapi_free_SocketAddress(addr); > + > + /* kill server */ > + qtest_quit(qts0); > + > + /* check client has been disconnected */ > + wait_stream_disconnected(qts1, "st0"); > + > + /* restart server */ > + qts0 = qtest_initf("-nodefaults -M none " > + "-netdev stream,id=st0,server=true,addr.type=inet," > + "addr.ipv4=on,addr.ipv6=off," > + "addr.host=127.0.0.1,addr.port=%d", port); > + > + /* wait connection events*/ > + wait_stream_connected(qts0, "st0", &addr); > + g_assert_cmpint(addr->type, ==, SOCKET_ADDRESS_TYPE_INET); > + g_assert_cmpstr(addr->u.inet.host, ==, "127.0.0.1"); > + qapi_free_SocketAddress(addr); > + > + wait_stream_connected(qts1, "st0", &addr); > + g_assert_cmpint(addr->type, ==, SOCKET_ADDRESS_TYPE_INET); > + g_assert_cmpstr(addr->u.inet.host, ==, "127.0.0.1"); > + g_assert_cmpint(atoi(addr->u.inet.port), ==, port); > + qapi_free_SocketAddress(addr); > + > + qtest_quit(qts1); > + qtest_quit(qts0); > +} > + > static void test_stream_inet_ipv6(void) > { > QTestState *qts0, *qts1; > @@ -415,6 +514,7 @@ int main(int argc, char **argv) > qtest_add_func("/netdev/stream/inet/ipv4", test_stream_inet_ipv4); > qtest_add_func("/netdev/dgram/inet", test_dgram_inet); > qtest_add_func("/netdev/dgram/mcast", test_dgram_mcast); > + qtest_add_func("/netdev/stream/inet/reconnect", test_stream_inet_reconnect); > } > if (has_ipv6) { > qtest_add_func("/netdev/stream/inet/ipv6", test_stream_inet_ipv6);
diff --git a/net/stream.c b/net/stream.c index 37ff727e0c42..9204b4c96e40 100644 --- a/net/stream.c +++ b/net/stream.c @@ -39,6 +39,8 @@ #include "io/channel-socket.h" #include "io/net-listener.h" #include "qapi/qapi-events-net.h" +#include "qapi/qapi-visit-sockets.h" +#include "qapi/clone-visitor.h" typedef struct NetStreamState { NetClientState nc; @@ -49,11 +51,15 @@ typedef struct NetStreamState { guint ioc_write_tag; SocketReadState rs; unsigned int send_index; /* number of bytes sent*/ + uint32_t reconnect; + guint timer_tag; + SocketAddress *addr; } NetStreamState; static void net_stream_listen(QIONetListener *listener, QIOChannelSocket *cioc, void *opaque); +static void net_stream_arm_reconnect(NetStreamState *s); static gboolean net_stream_writable(QIOChannel *ioc, GIOCondition condition, @@ -170,6 +176,7 @@ static gboolean net_stream_send(QIOChannel *ioc, qemu_set_info_str(&s->nc, "%s", ""); qapi_event_send_netdev_stream_disconnected(s->nc.name); + net_stream_arm_reconnect(s); return G_SOURCE_REMOVE; } @@ -187,6 +194,14 @@ static gboolean net_stream_send(QIOChannel *ioc, static void net_stream_cleanup(NetClientState *nc) { NetStreamState *s = DO_UPCAST(NetStreamState, nc, nc); + if (s->timer_tag) { + g_source_remove(s->timer_tag); + s->timer_tag = 0; + } + if (s->addr) { + qapi_free_SocketAddress(s->addr); + s->addr = NULL; + } if (s->ioc) { if (QIO_CHANNEL_SOCKET(s->ioc)->fd != -1) { if (s->ioc_read_tag) { @@ -346,12 +361,37 @@ static void net_stream_client_connected(QIOTask *task, gpointer opaque) error: object_unref(OBJECT(s->ioc)); s->ioc = NULL; + net_stream_arm_reconnect(s); +} + +static gboolean net_stream_reconnect(gpointer data) +{ + NetStreamState *s = data; + QIOChannelSocket *sioc; + + s->timer_tag = 0; + + sioc = qio_channel_socket_new(); + s->ioc = QIO_CHANNEL(sioc); + qio_channel_socket_connect_async(sioc, s->addr, + net_stream_client_connected, s, + NULL, NULL); + return G_SOURCE_REMOVE; +} + +static void net_stream_arm_reconnect(NetStreamState *s) +{ + if (s->reconnect && s->timer_tag == 0) { + s->timer_tag = g_timeout_add_seconds(s->reconnect, + net_stream_reconnect, s); + } } static int net_stream_client_init(NetClientState *peer, const char *model, const char *name, SocketAddress *addr, + uint32_t reconnect, Error **errp) { NetStreamState *s; @@ -364,6 +404,10 @@ static int net_stream_client_init(NetClientState *peer, s->ioc = QIO_CHANNEL(sioc); s->nc.link_down = true; + s->reconnect = reconnect; + if (reconnect) { + s->addr = QAPI_CLONE(SocketAddress, addr); + } qio_channel_socket_connect_async(sioc, addr, net_stream_client_connected, s, NULL, NULL); @@ -380,7 +424,14 @@ int net_init_stream(const Netdev *netdev, const char *name, sock = &netdev->u.stream; if (!sock->has_server || !sock->server) { - return net_stream_client_init(peer, "stream", name, sock->addr, errp); + return net_stream_client_init(peer, "stream", name, sock->addr, + sock->has_reconnect ? sock->reconnect : 0, + errp); + } + if (sock->has_reconnect) { + error_setg(errp, "'reconnect' option is incompatible with " + "socket in server mode"); + return -1; } return net_stream_server_init(peer, "stream", name, sock->addr, errp); } diff --git a/qapi/net.json b/qapi/net.json index 522ac582edeb..d6eb30008be0 100644 --- a/qapi/net.json +++ b/qapi/net.json @@ -585,6 +585,10 @@ # @addr: socket address to listen on (server=true) # or connect to (server=false) # @server: create server socket (default: false) +# @reconnect: For a client socket, if a socket is disconnected, +# then attempt a reconnect after the given number of seconds. +# Setting this to zero disables this function. (default: 0) +# (since 8.0) # # Only SocketAddress types 'unix', 'inet' and 'fd' are supported. # @@ -593,7 +597,8 @@ { 'struct': 'NetdevStreamOptions', 'data': { 'addr': 'SocketAddress', - '*server': 'bool' } } + '*server': 'bool', + '*reconnect': 'uint32' } } ## # @NetdevDgramOptions: diff --git a/qemu-options.hx b/qemu-options.hx index 7f99d15b231f..e8d3a384e165 100644 --- a/qemu-options.hx +++ b/qemu-options.hx @@ -2766,9 +2766,9 @@ 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[,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=file-descriptor\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][,reconnect=seconds]\n" + "-netdev stream,id=str[,server=on|off],addr.type=unix,addr.path=path[,abstract=on|off][,tight=on|off][,reconnect=seconds]\n" + "-netdev stream,id=str[,server=on|off],addr.type=fd,addr.str=file-descriptor[,reconnect=seconds]\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" diff --git a/tests/qtest/netdev-socket.c b/tests/qtest/netdev-socket.c index a9db9fa06e79..b6db396599ae 100644 --- a/tests/qtest/netdev-socket.c +++ b/tests/qtest/netdev-socket.c @@ -10,6 +10,10 @@ #include <glib/gstdio.h> #include "../unit/socket-helpers.h" #include "libqtest.h" +#include "qapi/qmp/qstring.h" +#include "qemu/sockets.h" +#include "qapi/qobject-input-visitor.h" +#include "qapi/qapi-visit-sockets.h" #define CONNECTION_TIMEOUT 5 @@ -141,6 +145,101 @@ static void test_stream_inet_ipv4(void) qtest_quit(qts0); } +static void wait_stream_connected(QTestState *qts, const char *id, + SocketAddress **addr) +{ + QDict *resp, *data; + QString *qstr; + QObject *obj; + Visitor *v = NULL; + + resp = qtest_qmp_eventwait_ref(qts, "NETDEV_STREAM_CONNECTED"); + g_assert_nonnull(resp); + data = qdict_get_qdict(resp, "data"); + g_assert_nonnull(data); + + qstr = qobject_to(QString, qdict_get(data, "netdev-id")); + g_assert_nonnull(data); + + g_assert(!strcmp(qstring_get_str(qstr), id)); + + obj = qdict_get(data, "addr"); + + v = qobject_input_visitor_new(obj); + visit_type_SocketAddress(v, NULL, addr, NULL); + visit_free(v); + qobject_unref(resp); +} + +static void wait_stream_disconnected(QTestState *qts, const char *id) +{ + QDict *resp, *data; + QString *qstr; + + resp = qtest_qmp_eventwait_ref(qts, "NETDEV_STREAM_DISCONNECTED"); + g_assert_nonnull(resp); + data = qdict_get_qdict(resp, "data"); + g_assert_nonnull(data); + + qstr = qobject_to(QString, qdict_get(data, "netdev-id")); + g_assert_nonnull(data); + + g_assert(!strcmp(qstring_get_str(qstr), id)); + qobject_unref(resp); +} + +static void test_stream_inet_reconnect(void) +{ + QTestState *qts0, *qts1; + int port; + SocketAddress *addr; + + port = inet_get_free_port(false); + qts0 = qtest_initf("-nodefaults -M none " + "-netdev stream,id=st0,server=true,addr.type=inet," + "addr.ipv4=on,addr.ipv6=off," + "addr.host=127.0.0.1,addr.port=%d", port); + + EXPECT_STATE(qts0, "st0: index=0,type=stream,\r\n", 0); + + qts1 = qtest_initf("-nodefaults -M none " + "-netdev stream,server=false,id=st0,addr.type=inet," + "addr.ipv4=on,addr.ipv6=off,reconnect=1," + "addr.host=127.0.0.1,addr.port=%d", port); + + wait_stream_connected(qts0, "st0", &addr); + g_assert_cmpint(addr->type, ==, SOCKET_ADDRESS_TYPE_INET); + g_assert_cmpstr(addr->u.inet.host, ==, "127.0.0.1"); + qapi_free_SocketAddress(addr); + + /* kill server */ + qtest_quit(qts0); + + /* check client has been disconnected */ + wait_stream_disconnected(qts1, "st0"); + + /* restart server */ + qts0 = qtest_initf("-nodefaults -M none " + "-netdev stream,id=st0,server=true,addr.type=inet," + "addr.ipv4=on,addr.ipv6=off," + "addr.host=127.0.0.1,addr.port=%d", port); + + /* wait connection events*/ + wait_stream_connected(qts0, "st0", &addr); + g_assert_cmpint(addr->type, ==, SOCKET_ADDRESS_TYPE_INET); + g_assert_cmpstr(addr->u.inet.host, ==, "127.0.0.1"); + qapi_free_SocketAddress(addr); + + wait_stream_connected(qts1, "st0", &addr); + g_assert_cmpint(addr->type, ==, SOCKET_ADDRESS_TYPE_INET); + g_assert_cmpstr(addr->u.inet.host, ==, "127.0.0.1"); + g_assert_cmpint(atoi(addr->u.inet.port), ==, port); + qapi_free_SocketAddress(addr); + + qtest_quit(qts1); + qtest_quit(qts0); +} + static void test_stream_inet_ipv6(void) { QTestState *qts0, *qts1; @@ -415,6 +514,7 @@ int main(int argc, char **argv) qtest_add_func("/netdev/stream/inet/ipv4", test_stream_inet_ipv4); qtest_add_func("/netdev/dgram/inet", test_dgram_inet); qtest_add_func("/netdev/dgram/mcast", test_dgram_mcast); + qtest_add_func("/netdev/stream/inet/reconnect", test_stream_inet_reconnect); } if (has_ipv6) { qtest_add_func("/netdev/stream/inet/ipv6", test_stream_inet_ipv6);
In stream mode, if the server shuts down there is currently no way to reconnect the client to a new server without removing the NIC device and the netdev backend (or to reboot). This patch introduces a reconnect option that specifies a delay to try to reconnect with the same parameters. Add a new test in qtest to test the reconnect option and the connect/disconnect events. Signed-off-by: Laurent Vivier <lvivier@redhat.com> --- Based-on: <20230105093751.416666-1-lvivier@redhat.com> v3: - add "since 8.0" in net.json v2: - rebase net/stream.c | 53 ++++++++++++++++++- qapi/net.json | 7 ++- qemu-options.hx | 6 +-- tests/qtest/netdev-socket.c | 100 ++++++++++++++++++++++++++++++++++++ 4 files changed, 161 insertions(+), 5 deletions(-)