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util: include the target address in socket connect failures

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Reporting "Failed to connect socket" is essentially useless for a user
attempting to diagnose failure. It needs to include the target address
details. Similarly when failing to create a socket we should include the
socket family info, so the user understands what particular feature was
missing in their kernel build (IPv6, VSock in particular).

Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
This commit is contained in:
Daniel P. Berrangé 2020-09-18 10:31:45 +01:00
parent 77b7829e75
commit dfc00eb7de
2 changed files with 21 additions and 15 deletions
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4
tests/qemu-iotests/162.out
View file

@ -6,8 +6,8 @@ image: nbd://localhost:PORT
image: nbd+unix://?socket=42
=== SSH ===
qemu-img: Could not open 'json:{"driver": "ssh", "host": "localhost", "port": "0", "path": "/foo"}': Failed to connect socket: Connection refused
qemu-img: Could not open 'driver=ssh,host=localhost,port=0,path=/foo': Failed to connect socket: Connection refused
qemu-img: Could not open 'json:{"driver": "ssh", "host": "localhost", "port": "0", "path": "/foo"}': Failed to connect to 'localhost:0': Connection refused
qemu-img: Could not open 'driver=ssh,host=localhost,port=0,path=/foo': Failed to connect to 'localhost:0': Connection refused
qemu-img: Could not open 'json:{"driver": "ssh", "host": "localhost", "port": 0.42, "path": "/foo"}': Parameter 'port' expects a number
qemu-img: Could not open 'driver=ssh,host=localhost,port=0.42,path=/foo': Parameter 'port' expects a number

32
util/qemu-sockets.c
View file

@ -354,15 +354,15 @@ listen_ok:
((rc) == -EINPROGRESS)
#endif
static int inet_connect_addr(struct addrinfo *addr, Error **errp);
static int inet_connect_addr(struct addrinfo *addr, Error **errp)
static int inet_connect_addr(const InetSocketAddress *saddr,
struct addrinfo *addr, Error **errp)
{
int sock, rc;
sock = qemu_socket(addr->ai_family, addr->ai_socktype, addr->ai_protocol);
if (sock < 0) {
error_setg_errno(errp, errno, "Failed to create socket");
error_setg_errno(errp, errno, "Failed to create socket family %d",
addr->ai_family);
return -1;
}
socket_set_fast_reuse(sock);
@ -376,7 +376,8 @@ static int inet_connect_addr(struct addrinfo *addr, Error **errp)
} while (rc == -EINTR);
if (rc < 0) {
error_setg_errno(errp, errno, "Failed to connect socket");
error_setg_errno(errp, errno, "Failed to connect to '%s:%s'",
saddr->host, saddr->port);
closesocket(sock);
return -1;
}
@ -455,7 +456,7 @@ int inet_connect_saddr(InetSocketAddress *saddr, Error **errp)
for (e = res; e != NULL; e = e->ai_next) {
error_free(local_err);
local_err = NULL;
sock = inet_connect_addr(e, &local_err);
sock = inet_connect_addr(saddr, e, &local_err);
if (sock >= 0) {
break;
}
@ -549,7 +550,8 @@ static int inet_dgram_saddr(InetSocketAddress *sraddr,
/* create socket */
sock = qemu_socket(peer->ai_family, peer->ai_socktype, peer->ai_protocol);
if (sock < 0) {
error_setg_errno(errp, errno, "Failed to create socket");
error_setg_errno(errp, errno, "Failed to create socket family %d",
peer->ai_family);
goto err;
}
socket_set_fast_reuse(sock);
@ -562,7 +564,8 @@ static int inet_dgram_saddr(InetSocketAddress *sraddr,
/* connect to peer */
if (connect(sock,peer->ai_addr,peer->ai_addrlen) < 0) {
error_setg_errno(errp, errno, "Failed to connect socket");
error_setg_errno(errp, errno, "Failed to connect to '%s:%s'",
addr, port);
goto err;
}
@ -735,13 +738,15 @@ static bool vsock_parse_vaddr_to_sockaddr(const VsockSocketAddress *vaddr,
return true;
}
static int vsock_connect_addr(const struct sockaddr_vm *svm, Error **errp)
static int vsock_connect_addr(const VsockSocketAddress *vaddr,
const struct sockaddr_vm *svm, Error **errp)
{
int sock, rc;
sock = qemu_socket(AF_VSOCK, SOCK_STREAM, 0);
if (sock < 0) {
error_setg_errno(errp, errno, "Failed to create socket");
error_setg_errno(errp, errno, "Failed to create socket family %d",
AF_VSOCK);
return -1;
}
@ -754,7 +759,8 @@ static int vsock_connect_addr(const struct sockaddr_vm *svm, Error **errp)
} while (rc == -EINTR);
if (rc < 0) {
error_setg_errno(errp, errno, "Failed to connect socket");
error_setg_errno(errp, errno, "Failed to connect to '%s:%s'",
vaddr->cid, vaddr->port);
closesocket(sock);
return -1;
}
@ -770,7 +776,7 @@ static int vsock_connect_saddr(VsockSocketAddress *vaddr, Error **errp)
return -1;
}
return vsock_connect_addr(&svm, errp);
return vsock_connect_addr(vaddr, &svm, errp);
}
static int vsock_listen_saddr(VsockSocketAddress *vaddr,
@ -994,7 +1000,7 @@ static int unix_connect_saddr(UnixSocketAddress *saddr, Error **errp)
} while (rc == -EINTR);
if (rc < 0) {
error_setg_errno(errp, -rc, "Failed to connect socket %s",
error_setg_errno(errp, -rc, "Failed to connect to '%s'",
saddr->path);
goto err;
}