[libvirt PATCH 5/9] remote: split out function for constructing socket path

The remoteGetUNIXSocketHelper method will be needed by source files beyond the remote driver client. Signed-off-by: Daniel P. Berrangé <berrange(a)redhat.com&gt; --- src/remote/remote_driver.c | 129 +--------------------------------- src/remote/remote_sockets.c | 134 ++++++++++++++++++++++++++++++++++++ src/remote/remote_sockets.h | 8 +++ 3 files changed, 145 insertions(+), 126 deletions(-) diff --git a/src/remote/remote_driver.c b/src/remote/remote_driver.c index c39085951e..c7fd24625e 100644 --- a/src/remote/remote_driver.c +++ b/src/remote/remote_driver.c @@ -697,131 +697,6 @@ remoteConnectSupportsFeatureUnlocked(virConnectPtr conn, } -static char * -remoteGetUNIXSocketHelper(remoteDriverTransport transport, - const char *sock_prefix, - unsigned int flags) -{ - char *sockname = NULL; - g_autofree char *userdir = 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; - } - userdir = virGetUserRuntimeDirectory(); - - sockname = g_strdup_printf("%s/%s-sock", userdir, sock_prefix); - } else { - /* Intentionally do *NOT* use RUNSTATEDIR here. We might - * be connecting to a remote machine, and cannot assume - * the remote host has /run. The converse is ok though, - * any machine with /run will have a /var/run symlink. - * The portable option is to thus use $LOCALSTATEDIR/run - */ - sockname = g_strdup_printf("%s/run/libvirt/%s-%s", LOCALSTATEDIR, - sock_prefix, - flags & VIR_DRV_OPEN_REMOTE_RO ? "sock-ro" : "sock"); - } - - VIR_DEBUG("Built UNIX sockname %s for transport %s prefix %s flags=0x%x", - sockname, remoteDriverTransportTypeToString(transport), - sock_prefix, flags); - return sockname; -} - - -static char * -remoteGetUNIXSocket(remoteDriverTransport transport, - remoteDriverMode mode, - const char *driver, - char **daemon, - unsigned int flags) -{ - char *sock_name = NULL; - g_autofree char *direct_daemon = NULL; - g_autofree char *legacy_daemon = NULL; - g_autofree char *direct_sock_name = NULL; - g_autofree char *legacy_sock_name = NULL; - - if (driver) - direct_daemon = g_strdup_printf("virt%sd", driver); - - legacy_daemon = g_strdup("libvirtd"); - - if (driver && - !(direct_sock_name = remoteGetUNIXSocketHelper(transport, direct_daemon, flags))) - return NULL; - - if (!(legacy_sock_name = remoteGetUNIXSocketHelper(transport, "libvirt", flags))) - return NULL; - - if (mode == REMOTE_DRIVER_MODE_AUTO) { - if (transport == REMOTE_DRIVER_TRANSPORT_UNIX) { - if (direct_sock_name && virFileExists(direct_sock_name)) { - mode = REMOTE_DRIVER_MODE_DIRECT; - } else if (virFileExists(legacy_sock_name)) { - mode = REMOTE_DRIVER_MODE_LEGACY; - } else if (driver) { - /* - * This constant comes from the configure script and - * maps to either the direct or legacy mode constant - */ - mode = REMOTE_DRIVER_MODE_DEFAULT; - } else { - mode = REMOTE_DRIVER_MODE_LEGACY; - } - } else { - mode = REMOTE_DRIVER_MODE_LEGACY; - } - } - - switch ((remoteDriverMode)mode) { - case REMOTE_DRIVER_MODE_LEGACY: - sock_name = g_steal_pointer(&legacy_sock_name); - *daemon = g_steal_pointer(&legacy_daemon); - break; - - case REMOTE_DRIVER_MODE_DIRECT: - if (transport != REMOTE_DRIVER_TRANSPORT_UNIX) { - virReportError(VIR_ERR_OPERATION_UNSUPPORTED, - _("Cannot use direct socket mode for %s transport"), - remoteDriverTransportTypeToString(transport)); - return NULL; - } - - if (!direct_sock_name) { - virReportError(VIR_ERR_OPERATION_UNSUPPORTED, "%s", - _("Cannot use direct socket mode if no URI is set")); - return NULL; - } - - sock_name = g_steal_pointer(&direct_sock_name); - *daemon = g_steal_pointer(&direct_daemon); - break; - - case REMOTE_DRIVER_MODE_AUTO: - case REMOTE_DRIVER_MODE_LAST: - default: - virReportEnumRangeError(remoteDriverMode, mode); - return NULL; - } - - VIR_DEBUG("Chosen UNIX sockname %s daemon %s " - "for mode %s transport %s flags=0x%x", - sock_name, NULLSTR(*daemon), - remoteDriverModeTypeToString(mode), - remoteDriverTransportTypeToString(transport), - flags); - return sock_name; -} - - #ifndef WIN32 static const char * remoteGetDaemonPathEnv(void) @@ -1015,7 +890,9 @@ doRemoteOpen(virConnectPtr conn, case REMOTE_DRIVER_TRANSPORT_LIBSSH2: if (!sockname && !(sockname = remoteGetUNIXSocket(transport, mode, driver_str, - &daemon_name, flags))) + flags & VIR_DRV_OPEN_REMOTE_RO, + flags & VIR_DRV_OPEN_REMOTE_USER, + &daemon_name))) goto failed; break; diff --git a/src/remote/remote_sockets.c b/src/remote/remote_sockets.c index cdc0a00293..28e02e24d5 100644 --- a/src/remote/remote_sockets.c +++ b/src/remote/remote_sockets.c @@ -22,9 +22,15 @@ #include "remote_sockets.h" #include "virerror.h" +#include "virlog.h" +#include "virfile.h" +#include "virutil.h" +#include "configmake.h" #define VIR_FROM_THIS VIR_FROM_REMOTE +VIR_LOG_INIT("remote.remote_sockets"); + VIR_ENUM_IMPL(remoteDriverTransport, REMOTE_DRIVER_TRANSPORT_LAST, "tls", @@ -90,3 +96,131 @@ remoteSplitURIScheme(virURIPtr uri, return 0; } + + +static char * +remoteGetUNIXSocketHelper(remoteDriverTransport transport, + const char *sock_prefix, + bool ro, + bool session) +{ + char *sockname = NULL; + g_autofree char *userdir = NULL; + + if (session) { + 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; + } + userdir = virGetUserRuntimeDirectory(); + + sockname = g_strdup_printf("%s/%s-sock", userdir, sock_prefix); + } else { + /* Intentionally do *NOT* use RUNSTATEDIR here. We might + * be connecting to a remote machine, and cannot assume + * the remote host has /run. The converse is ok though, + * any machine with /run will have a /var/run symlink. + * The portable option is to thus use $LOCALSTATEDIR/run + */ + sockname = g_strdup_printf("%s/run/libvirt/%s-%s", LOCALSTATEDIR, + sock_prefix, + ro ? "sock-ro" : "sock"); + } + + VIR_DEBUG("Built UNIX sockname=%s for transport=%s " + "prefix=%s ro=%d session=%d", + sockname, remoteDriverTransportTypeToString(transport), + sock_prefix, ro, session); + return sockname; +} + + +char * +remoteGetUNIXSocket(remoteDriverTransport transport, + remoteDriverMode mode, + const char *driver, + bool ro, + bool session, + char **daemon) +{ + char *sock_name = NULL; + g_autofree char *direct_daemon = NULL; + g_autofree char *legacy_daemon = NULL; + g_autofree char *direct_sock_name = NULL; + g_autofree char *legacy_sock_name = NULL; + + if (driver) + direct_daemon = g_strdup_printf("virt%sd", driver); + + legacy_daemon = g_strdup("libvirtd"); + + if (driver && + !(direct_sock_name = remoteGetUNIXSocketHelper(transport, direct_daemon, ro, session))) + return NULL; + + if (!(legacy_sock_name = remoteGetUNIXSocketHelper(transport, "libvirt", ro, session))) + return NULL; + + if (mode == REMOTE_DRIVER_MODE_AUTO) { + if (transport == REMOTE_DRIVER_TRANSPORT_UNIX) { + if (direct_sock_name && virFileExists(direct_sock_name)) { + mode = REMOTE_DRIVER_MODE_DIRECT; + } else if (virFileExists(legacy_sock_name)) { + mode = REMOTE_DRIVER_MODE_LEGACY; + } else if (driver) { + /* + * This constant comes from the configure script and + * maps to either the direct or legacy mode constant + */ + mode = REMOTE_DRIVER_MODE_DEFAULT; + } else { + mode = REMOTE_DRIVER_MODE_LEGACY; + } + } else { + mode = REMOTE_DRIVER_MODE_LEGACY; + } + } + + switch ((remoteDriverMode)mode) { + case REMOTE_DRIVER_MODE_LEGACY: + sock_name = g_steal_pointer(&legacy_sock_name); + *daemon = g_steal_pointer(&legacy_daemon); + break; + + case REMOTE_DRIVER_MODE_DIRECT: + if (transport != REMOTE_DRIVER_TRANSPORT_UNIX) { + virReportError(VIR_ERR_OPERATION_UNSUPPORTED, + _("Cannot use direct socket mode for %s transport"), + remoteDriverTransportTypeToString(transport)); + return NULL; + } + + if (!direct_sock_name) { + virReportError(VIR_ERR_OPERATION_UNSUPPORTED, "%s", + _("Cannot use direct socket mode if no URI is set")); + return NULL; + } + + sock_name = g_steal_pointer(&direct_sock_name); + *daemon = g_steal_pointer(&direct_daemon); + break; + + case REMOTE_DRIVER_MODE_AUTO: + case REMOTE_DRIVER_MODE_LAST: + default: + virReportEnumRangeError(remoteDriverMode, mode); + return NULL; + } + + VIR_DEBUG("Chosen UNIX sockname=%s daemon=%s " + "for mode=%s transport=%s ro=%d session=%d", + sock_name, NULLSTR(*daemon), + remoteDriverModeTypeToString(mode), + remoteDriverTransportTypeToString(transport), + ro, session); + return sock_name; +} diff --git a/src/remote/remote_sockets.h b/src/remote/remote_sockets.h index ade3feab88..64055f3d44 100644 --- a/src/remote/remote_sockets.h +++ b/src/remote/remote_sockets.h @@ -54,3 +54,11 @@ int remoteSplitURIScheme(virURIPtr uri, char **driver, remoteDriverTransport *transport); + +char * +remoteGetUNIXSocket(remoteDriverTransport transport, + remoteDriverMode mode, + const char *driver, + bool ro, + bool session, + char **daemon); -- 2.26.2