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remote: refactor the code for choosing the UNIX socket path

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The ssh, libssh, libssh2 & unix transports all need to use a UNIX socket
path, and duplicate some of the same logic for error checking. Pull this
out into a separate method to increase code sharing.

Reviewed-by: Andrea Bolognani <abologna@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
This commit is contained in:
Daniel P. Berrangé 2019-07-09 15:08:34 +01:00
parent 8b21674932
commit 746955690a
1 changed files with 48 additions and 74 deletions
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122
src/remote/remote_driver.c
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@ -747,34 +747,35 @@ remoteConnectSupportsFeatureUnlocked(virConnectPtr conn,
}
#ifndef WIN32
static char *remoteGetUNIXSocketNonRoot(void)
static char *
remoteGetUNIXSocket(remoteDriverTransport transport,
unsigned int flags)
{
char *sockname = NULL;
char *userdir = virGetUserRuntimeDirectory();
VIR_AUTOFREE(char *) userdir = NULL;
if (!userdir)
return NULL;
if (flags & VIR_DRV_OPEN_REMOTE_USER) {
if (transport != REMOTE_DRIVER_TRANSPORT_UNIX) {
virReportError(VIR_ERR_OPERATION_UNSUPPORTED,
_("Connecting to session instance without "
"socket path is not supported by the %s "
"transport"),
remoteDriverTransportTypeToString(transport));
return NULL;
}
if (!(userdir = virGetUserRuntimeDirectory()))
return NULL;
if (virAsprintf(&sockname, "%s/" LIBVIRTD_USER_UNIX_SOCKET, userdir) < 0) {
VIR_FREE(userdir);
return NULL;
if (virAsprintf(&sockname,
"%s/" LIBVIRTD_USER_UNIX_SOCKET, userdir) < 0)
return NULL;
} else {
if (VIR_STRDUP(sockname,
flags & VIR_DRV_OPEN_REMOTE_RO ?
LIBVIRTD_PRIV_UNIX_SOCKET_RO :
LIBVIRTD_PRIV_UNIX_SOCKET) < 0)
return NULL;
}
VIR_FREE(userdir);
VIR_DEBUG("Chosen UNIX sockname %s", sockname);
return sockname;
}
#endif /* WIN32 */
static char *remoteGetUNIXSocketRoot(unsigned int flags)
{
char *sockname = NULL;
if (VIR_STRDUP(sockname,
flags & VIR_DRV_OPEN_REMOTE_RO ?
LIBVIRTD_PRIV_UNIX_SOCKET_RO : LIBVIRTD_PRIV_UNIX_SOCKET) < 0)
return NULL;
VIR_DEBUG("Chosen UNIX sockname %s", sockname);
return sockname;
@ -961,6 +962,30 @@ doRemoteOpen(virConnectPtr conn,
}
VIR_DEBUG("Connecting with transport %d", transport);
switch ((remoteDriverTransport)transport) {
case REMOTE_DRIVER_TRANSPORT_UNIX:
case REMOTE_DRIVER_TRANSPORT_SSH:
case REMOTE_DRIVER_TRANSPORT_LIBSSH:
case REMOTE_DRIVER_TRANSPORT_LIBSSH2:
if (!sockname &&
!(sockname = remoteGetUNIXSocket(transport, flags)))
goto failed;
break;
case REMOTE_DRIVER_TRANSPORT_TCP:
case REMOTE_DRIVER_TRANSPORT_TLS:
case REMOTE_DRIVER_TRANSPORT_EXT:
break;
case REMOTE_DRIVER_TRANSPORT_LAST:
default:
virReportEnumRangeError(remoteDriverTransport, transport);
goto failed;
}
VIR_DEBUG("Chosen UNIX socket %s", NULLSTR(sockname));
/* Connect to the remote service. */
switch ((remoteDriverTransport)transport) {
case REMOTE_DRIVER_TRANSPORT_TLS:
@ -1002,20 +1027,6 @@ doRemoteOpen(virConnectPtr conn,
break;
case REMOTE_DRIVER_TRANSPORT_LIBSSH2:
if (!sockname) {
/* Right now we don't support default session connections */
if (flags & VIR_DRV_OPEN_REMOTE_USER) {
virReportError(VIR_ERR_OPERATION_UNSUPPORTED, "%s",
_("Connecting to session instance without "
"socket path is not supported by the libssh2 "
"connection driver"));
goto failed;
}
if (!(sockname = remoteGetUNIXSocketRoot(flags)))
goto failed;
}
VIR_DEBUG("Starting LibSSH2 session");
priv->client = virNetClientNewLibSSH2(priv->hostname,
@ -1037,20 +1048,6 @@ doRemoteOpen(virConnectPtr conn,
break;
case REMOTE_DRIVER_TRANSPORT_LIBSSH:
if (!sockname) {
/* Right now we don't support default session connections */
if (flags & VIR_DRV_OPEN_REMOTE_USER) {
virReportError(VIR_ERR_OPERATION_UNSUPPORTED, "%s",
_("Connecting to session instance without "
"socket path is not supported by the libssh "
"connection driver"));
goto failed;
}
if (!(sockname = remoteGetUNIXSocketRoot(flags)))
goto failed;
}
VIR_DEBUG("Starting libssh session");
priv->client = virNetClientNewLibssh(priv->hostname,
@ -1073,15 +1070,6 @@ doRemoteOpen(virConnectPtr conn,
#ifndef WIN32
case REMOTE_DRIVER_TRANSPORT_UNIX:
if (!sockname) {
if (flags & VIR_DRV_OPEN_REMOTE_USER)
sockname = remoteGetUNIXSocketNonRoot();
else
sockname = remoteGetUNIXSocketRoot(flags);
if (!sockname)
goto failed;
}
if ((flags & VIR_DRV_OPEN_REMOTE_AUTOSTART) &&
!(daemonPath = virFileFindResourceFull("libvirtd",
NULL, NULL,
@ -1102,20 +1090,6 @@ doRemoteOpen(virConnectPtr conn,
if (!command && VIR_STRDUP(command, "ssh") < 0)
goto failed;
if (!sockname) {
/* Right now we don't support default session connections */
if (flags & VIR_DRV_OPEN_REMOTE_USER) {
virReportError(VIR_ERR_OPERATION_UNSUPPORTED, "%s",
_("Connecting to session instance without "
"socket path is not supported by the ssh "
"connection driver"));
goto failed;
}
if (!(sockname = remoteGetUNIXSocketRoot(flags)))
goto failed;
}
if (!(priv->client = virNetClientNewSSH(priv->hostname,
port,
command,