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remote: fix handling of systemd activation wrt socket ordering
The current libvirtd code for systemd socket activation assumes socket FDs are passed in the order unix-rw, unix-ro, unix-admin. There is in fact no ordering guarantee made by systemd. Applications are expected to check the address or name associated with each FD to figure out its identity. This rewrites libvirtd to make use of the new systemd activation APIs to make it robust wrt socket ordering changes. Reviewed-by: Michal Privoznik <mprivozn@redhat.com> Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
This commit is contained in:
Daniel P. Berrangé
parent
e9095c328a
commit
e2f012b8f0
@ -56,6 +56,7 @@
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#include "virutil.h"
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#include "virgettext.h"
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#include "util/virnetdevopenvswitch.h"
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#include "virsystemd.h"
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#include "driver.h"
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@ -367,30 +368,34 @@ daemonSetupNetworking(virNetServerPtr srv,
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bool ipsock,
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bool privileged)
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{
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virNetServerServicePtr svc = NULL;
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virNetServerServicePtr svcAdm = NULL;
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virNetServerServicePtr svcRO = NULL;
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virNetServerServicePtr svcTCP = NULL;
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virNetServerServicePtr svcTLS = NULL;
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gid_t unix_sock_gid = 0;
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int unix_sock_ro_mask = 0;
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int unix_sock_rw_mask = 0;
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int unix_sock_adm_mask = 0;
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int ret = -1;
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VIR_AUTOPTR(virSystemdActivation) act = NULL;
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virSystemdActivationMap actmap[] = {
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{ .name = "libvirtd.socket", .family = AF_UNIX, .path = sock_path },
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{ .name = "libvirtd-ro.socket", .family = AF_UNIX, .path = sock_path_ro },
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{ .name = "libvirtd-admin.socket", .family = AF_UNIX, .path = sock_path_adm },
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{ .name = "libvirtd-tcp.socket", .family = AF_INET },
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{ .name = "libvirtd-tls.socket", .family = AF_INET },
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};
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unsigned int cur_fd = STDERR_FILENO + 1;
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unsigned int nfds = virGetListenFDs();
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if ((actmap[3].port = virSocketAddrResolveService(config->tcp_port)) < 0)
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return -1;
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if ((actmap[4].port = virSocketAddrResolveService(config->tls_port)) < 0)
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return -1;
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if (virSystemdGetActivation(actmap, ARRAY_CARDINALITY(actmap), &act) < 0)
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return -1;
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if (config->unix_sock_group) {
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if (virGetGroupID(config->unix_sock_group, &unix_sock_gid) < 0)
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return ret;
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}
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if (nfds > (sock_path_ro ? 2 : 1)) {
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VIR_ERROR(_("Too many (%u) FDs passed from caller"), nfds);
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return ret;
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}
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if (virStrToLong_i(config->unix_sock_ro_perms, NULL, 8, &unix_sock_ro_mask) != 0) {
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VIR_ERROR(_("Failed to parse mode '%s'"), config->unix_sock_ro_perms);
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goto cleanup;
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@ -406,71 +411,61 @@ daemonSetupNetworking(virNetServerPtr srv,
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goto cleanup;
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}
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if (!(svc = virNetServerServiceNewFDOrUNIX(sock_path,
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if (virNetServerAddServiceUNIX(srv,
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act,
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"libvirtd.socket",
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sock_path,
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unix_sock_rw_mask,
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unix_sock_gid,
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config->auth_unix_rw,
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NULL,
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false,
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config->max_queued_clients,
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config->max_client_requests,
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nfds, &cur_fd)))
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config->max_client_requests) < 0)
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goto cleanup;
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if (sock_path_ro) {
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if (!(svcRO = virNetServerServiceNewFDOrUNIX(sock_path_ro,
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if (sock_path_ro &&
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virNetServerAddServiceUNIX(srv,
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act,
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"libvirtd-ro.socket",
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sock_path_ro,
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unix_sock_ro_mask,
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unix_sock_gid,
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config->auth_unix_ro,
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NULL,
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true,
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config->max_queued_clients,
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config->max_client_requests,
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nfds, &cur_fd)))
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goto cleanup;
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}
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if (virNetServerAddService(srv, svc) < 0)
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config->max_client_requests) < 0)
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goto cleanup;
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if (svcRO &&
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virNetServerAddService(srv, svcRO) < 0)
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goto cleanup;
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if (sock_path_adm) {
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VIR_DEBUG("Registering unix socket %s", sock_path_adm);
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if (!(svcAdm = virNetServerServiceNewUNIX(sock_path_adm,
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if (sock_path_adm &&
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virNetServerAddServiceUNIX(srvAdm,
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act,
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"libvirtd-admin.socket",
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sock_path_adm,
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unix_sock_adm_mask,
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unix_sock_gid,
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REMOTE_AUTH_NONE,
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NULL,
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false,
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config->admin_max_queued_clients,
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config->admin_max_client_requests)))
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config->admin_max_client_requests) < 0)
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goto cleanup;
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if (virNetServerAddService(srvAdm, svcAdm) < 0)
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goto cleanup;
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}
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if (ipsock) {
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if (config->listen_tcp) {
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VIR_DEBUG("Registering TCP socket %s:%s",
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config->listen_addr, config->tcp_port);
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if (!(svcTCP = virNetServerServiceNewTCP(config->listen_addr,
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if (((ipsock && config->listen_tcp) || act) &&
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virNetServerAddServiceTCP(srv,
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act,
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"libvirtd-tcp.socket",
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config->listen_addr,
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config->tcp_port,
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AF_UNSPEC,
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config->auth_tcp,
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NULL,
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false,
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config->max_queued_clients,
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config->max_client_requests)))
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config->max_client_requests) < 0)
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goto cleanup;
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if (virNetServerAddService(srv, svcTCP) < 0)
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goto cleanup;
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}
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if (config->listen_tls) {
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if (((ipsock && config->listen_tls) || (act && virSystemdActivationHasName(act, "ip-tls")))) {
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virNetTLSContextPtr ctxt = NULL;
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if (config->ca_file ||
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@ -514,24 +509,26 @@ daemonSetupNetworking(virNetServerPtr srv,
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VIR_DEBUG("Registering TLS socket %s:%s",
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config->listen_addr, config->tls_port);
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if (!(svcTLS =
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virNetServerServiceNewTCP(config->listen_addr,
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if (virNetServerAddServiceTCP(srv,
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act,
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"libvirtd-tls.socket",
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config->listen_addr,
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config->tls_port,
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AF_UNSPEC,
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config->auth_tls,
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ctxt,
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false,
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config->max_queued_clients,
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config->max_client_requests))) {
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config->max_client_requests) < 0) {
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virObjectUnref(ctxt);
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goto cleanup;
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}
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if (virNetServerAddService(srv, svcTLS) < 0)
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goto cleanup;
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virObjectUnref(ctxt);
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}
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virObjectUnref(ctxt);
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}
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}
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if (act &&
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virSystemdActivationComplete(act) < 0)
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goto cleanup;
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#if WITH_SASL
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if (virNetServerNeedsAuth(srv, REMOTE_AUTH_SASL) &&
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@ -543,11 +540,6 @@ daemonSetupNetworking(virNetServerPtr srv,
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ret = 0;
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cleanup:
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virObjectUnref(svcTLS);
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virObjectUnref(svcTCP);
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virObjectUnref(svcRO);
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virObjectUnref(svcAdm);
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virObjectUnref(svc);
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return ret;
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}
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@ -28,9 +28,12 @@
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#include "viralloc.h"
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#include "virerror.h"
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#include "virthread.h"
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#include "virlog.h"
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#define VIR_FROM_THIS VIR_FROM_RPC
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VIR_LOG_INIT("rpc.netserverservice");
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struct _virNetServerService {
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virObject parent;
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@ -201,6 +204,8 @@ virNetServerServicePtr virNetServerServiceNewTCP(const char *nodename,
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virNetSocketPtr *socks;
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size_t nsocks;
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VIR_DEBUG("Creating new TCP server nodename='%s' service='%s'",
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NULLSTR(nodename), NULLSTR(service));
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if (virNetSocketNewListenTCP(nodename,
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service,
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family,
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@ -236,6 +241,8 @@ virNetServerServicePtr virNetServerServiceNewUNIX(const char *path,
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virNetServerServicePtr svc;
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virNetSocketPtr sock;
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VIR_DEBUG("Creating new UNIX server path='%s' mask=%o gid=%u",
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path, mask, grp);
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if (virNetSocketNewListenUNIX(path,
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mask,
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-1,
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