[libvirt] [PATCH v2 4/8] qemu_monitor: Introduce qemuMonitorAttachCharDev

The function being introduced is responsible for preparing and executing 'chardev-add' qemu monitor command. Moreover, in case of PTY chardev, the corresponding pty path is updated. --- src/qemu/qemu_monitor.c | 21 +++++ src/qemu/qemu_monitor.h | 3 + src/qemu/qemu_monitor_json.c | 189 +++++++++++++++++++++++++++++++++++++++++++ src/qemu/qemu_monitor_json.h | 3 + 4 files changed, 216 insertions(+) diff --git a/src/qemu/qemu_monitor.c b/src/qemu/qemu_monitor.c index ad326c5..d11b97e 100644 --- a/src/qemu/qemu_monitor.c +++ b/src/qemu/qemu_monitor.c @@ -3626,3 +3626,24 @@ int qemuMonitorGetTPMTypes(qemuMonitorPtr mon, return qemuMonitorJSONGetTPMTypes(mon, tpmtypes); } + +int qemuMonitorAttachCharDev(qemuMonitorPtr mon, + const char *chrID, + virDomainChrSourceDefPtr chr) +{ + VIR_DEBUG("mon=%p chrID=%s chr=%p", mon, chrID, chr); + + if (!mon) { + virReportError(VIR_ERR_INVALID_ARG, "%s", + _("monitor must not be NULL")); + return -1; + } + + if (!mon->json) { + virReportError(VIR_ERR_OPERATION_UNSUPPORTED, "%s", + _("JSON monitor is required")); + return -1; + } + + return qemuMonitorJSONAttachCharDev(mon, chrID, chr); +} diff --git a/src/qemu/qemu_monitor.h b/src/qemu/qemu_monitor.h index a607712..3e7b4cb 100644 --- a/src/qemu/qemu_monitor.h +++ b/src/qemu/qemu_monitor.h @@ -696,6 +696,9 @@ int qemuMonitorGetTPMModels(qemuMonitorPtr mon, int qemuMonitorGetTPMTypes(qemuMonitorPtr mon, char ***tpmtypes); +int qemuMonitorAttachCharDev(qemuMonitorPtr mon, + const char *chrID, + virDomainChrSourceDefPtr chr); /** * When running two dd process and using <> redirection, we need a * shell that will not truncate files. These two strings serve that diff --git a/src/qemu/qemu_monitor_json.c b/src/qemu/qemu_monitor_json.c index b87b8b5..0399963 100644 --- a/src/qemu/qemu_monitor_json.c +++ b/src/qemu/qemu_monitor_json.c @@ -4760,6 +4760,30 @@ error: return NULL; } +static virJSONValuePtr +qemuMonitorJSONBuildUnixSocketAddress(const char *path) +{ + virJSONValuePtr addr = NULL; + virJSONValuePtr data = NULL; + + if (!(data = virJSONValueNewObject()) || + !(addr = virJSONValueNewObject())) + goto error; + + /* port is really expected as a string here by qemu */ + if (virJSONValueObjectAppendString(data, "path", path) < 0 || + virJSONValueObjectAppendString(addr, "type", "unix") < 0 || + virJSONValueObjectAppend(addr, "data", data) < 0) + goto error; + + return addr; +error: + virReportOOMError(); + virJSONValueFree(data); + virJSONValueFree(addr); + return NULL; +} + int qemuMonitorJSONNBDServerStart(qemuMonitorPtr mon, const char *host, @@ -4939,3 +4963,168 @@ int qemuMonitorJSONGetTPMTypes(qemuMonitorPtr mon, { return qemuMonitorJSONGetStringArray(mon, "query-tpm-types", tpmtypes); } + +static virJSONValuePtr +qemuMonitorJSONAttachCharDevCommand(const char *chrID, + const virDomainChrSourceDefPtr chr) +{ + virJSONValuePtr ret; + virJSONValuePtr backend; + virJSONValuePtr data = NULL; + virJSONValuePtr addr = NULL; + const char *backend_type; + bool telnet; + + if (!(backend = virJSONValueNewObject()) || + !(data = virJSONValueNewObject())) { + goto no_memory; + } + + switch ((enum virDomainChrType) chr->type) { + case VIR_DOMAIN_CHR_TYPE_NULL: + case VIR_DOMAIN_CHR_TYPE_VC: + backend_type = "null"; + break; + + case VIR_DOMAIN_CHR_TYPE_PTY: + backend_type = "pty"; + break; + + case VIR_DOMAIN_CHR_TYPE_FILE: + backend_type = "file"; + if (virJSONValueObjectAppendString(data, "out", chr->data.file.path) < 0) + goto no_memory; + break; + + case VIR_DOMAIN_CHR_TYPE_DEV: + backend_type = STRPREFIX(chrID, "parallel") ? "parallel" : "serial"; + if (virJSONValueObjectAppendString(data, "device", + chr->data.file.path) < 0) + goto no_memory; + break; + + case VIR_DOMAIN_CHR_TYPE_TCP: + backend_type = "socket"; + addr = qemuMonitorJSONBuildInetSocketAddress(chr->data.tcp.host, + chr->data.tcp.service); + if (!addr || + virJSONValueObjectAppend(data, "addr", addr) < 0) + goto no_memory; + addr = NULL; + + telnet = chr->data.tcp.protocol == VIR_DOMAIN_CHR_TCP_PROTOCOL_TELNET; + + if (virJSONValueObjectAppendBoolean(data, "wait", false) < 0 || + virJSONValueObjectAppendBoolean(data, "telnet", telnet) < 0 || + virJSONValueObjectAppendBoolean(data, "server", chr->data.tcp.listen) < 0) + goto no_memory; + break; + + case VIR_DOMAIN_CHR_TYPE_UDP: + backend_type = "socket"; + addr = qemuMonitorJSONBuildInetSocketAddress(chr->data.udp.connectHost, + chr->data.udp.connectService); + if (!addr || + virJSONValueObjectAppend(data, "addr", addr) < 0) + goto no_memory; + addr = NULL; + break; + + case VIR_DOMAIN_CHR_TYPE_UNIX: + backend_type = "socket"; + addr = qemuMonitorJSONBuildUnixSocketAddress(chr->data.nix.path); + + if (!addr || + virJSONValueObjectAppend(data, "addr", addr) < 0) + goto no_memory; + addr = NULL; + + if (virJSONValueObjectAppendBoolean(data, "wait", false) < 0 || + virJSONValueObjectAppendBoolean(data, "server", chr->data.nix.listen) < 0) + goto no_memory; + break; + + case VIR_DOMAIN_CHR_TYPE_SPICEVMC: + case VIR_DOMAIN_CHR_TYPE_PIPE: + case VIR_DOMAIN_CHR_TYPE_STDIO: + case VIR_DOMAIN_CHR_TYPE_LAST: + default: + virReportError(VIR_ERR_OPERATION_FAILED, + _("Unsupported char device type '%d'"), + chr->type); + goto error; + } + + if (virJSONValueObjectAppendString(backend, "type", backend_type) < 0 || + virJSONValueObjectAppend(backend, "data", data) < 0) + goto no_memory; + data = NULL; + + if (!(ret = qemuMonitorJSONMakeCommand("chardev-add", + "s:id", chrID, + "a:backend", backend, + NULL))) + goto error; + + return ret; + +no_memory: + virReportOOMError(); +error: + virJSONValueFree(addr); + virJSONValueFree(data); + virJSONValueFree(backend); + return NULL; +} + +static int +qemuMonitorJSONAttachCharDevInfo(virJSONValuePtr reply, + virDomainChrSourceDefPtr chr) +{ + virJSONValuePtr data; + const char *path; + + if (chr->type != VIR_DOMAIN_CHR_TYPE_PTY) + return 0; + + if (!(data = virJSONValueObjectGet(reply, "return"))) { + virReportError(VIR_ERR_INTERNAL_ERROR, "%s", + _("chardev-add reply was missing return data")); + return -1; + } + + if (!(path = virJSONValueObjectGetString(data, "pty"))) { + virReportError(VIR_ERR_INTERNAL_ERROR, "%s", + _("chardev-add reply was missing pty path")); + return -1; + } + + if (VIR_STRDUP(chr->data.file.path, path) < 0) + return -1; + return 0; +} + +int +qemuMonitorJSONAttachCharDev(qemuMonitorPtr mon, + const char *chrID, + virDomainChrSourceDefPtr chr) +{ + int ret = -1; + virJSONValuePtr cmd; + virJSONValuePtr reply = NULL; + + if (!(cmd = qemuMonitorJSONAttachCharDevCommand(chrID, chr))) + return ret; + + ret = qemuMonitorJSONCommand(mon, cmd, &reply); + + if (ret == 0) + ret = qemuMonitorJSONCheckError(cmd, reply); + + if (ret == 0) + ret = qemuMonitorJSONAttachCharDevInfo(reply, chr); + + virJSONValueFree(cmd); + virJSONValueFree(reply); + return ret; +} diff --git a/src/qemu/qemu_monitor_json.h b/src/qemu/qemu_monitor_json.h index 74e2476..b66fd3d 100644 --- a/src/qemu/qemu_monitor_json.h +++ b/src/qemu/qemu_monitor_json.h @@ -353,4 +353,7 @@ int qemuMonitorJSONGetTPMTypes(qemuMonitorPtr mon, char ***tpmtypes) ATTRIBUTE_NONNULL(2); +int qemuMonitorJSONAttachCharDev(qemuMonitorPtr mon, + const char *chrID, + virDomainChrSourceDefPtr chr); #endif /* QEMU_MONITOR_JSON_H */ -- 1.8.2.1