qemu-ga: add guest-get-osinfo command
Add a new 'guest-get-osinfo' command for reporting basic information of the guest operating system. This includes machine architecture, version and release of the kernel and several fields from os-release file if it is present (as defined in [1]). [1] https://www.freedesktop.org/software/systemd/man/os-release.html Signed-off-by: Vinzenz Feenstra <vfeenstr@redhat.com> Signed-off-by: Tomáš Golembiovský <tgolembi@redhat.com> * moved declarations to beginning of functions * dropped unecessary initialization of struct utsname Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
This commit is contained in:
Tomáš Golembiovský
Michael Roth
parent
cbcd9ba1b7
commit
9848f79740
@ -13,6 +13,7 @@
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#include "qemu/osdep.h"
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#include <sys/ioctl.h>
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#include <sys/utsname.h>
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#include <sys/wait.h>
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#include <dirent.h>
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#include "qga/guest-agent-core.h"
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@ -2592,3 +2593,137 @@ GuestUserList *qmp_guest_get_users(Error **errp)
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}
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#endif
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/* Replace escaped special characters with theire real values. The replacement
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* is done in place -- returned value is in the original string.
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*/
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static void ga_osrelease_replace_special(gchar *value)
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{
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gchar *p, *p2, quote;
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/* Trim the string at first space or semicolon if it is not enclosed in
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* single or double quotes. */
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if ((value[0] != '"') || (value[0] == '\'')) {
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p = strchr(value, ' ');
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if (p != NULL) {
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*p = 0;
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}
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p = strchr(value, ';');
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if (p != NULL) {
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*p = 0;
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}
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return;
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}
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quote = value[0];
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p2 = value;
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p = value + 1;
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while (*p != 0) {
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if (*p == '\\') {
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p++;
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switch (*p) {
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case '$':
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case '\'':
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case '"':
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case '\\':
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case '`':
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break;
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default:
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/* Keep literal backslash followed by whatever is there */
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p--;
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break;
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}
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} else if (*p == quote) {
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*p2 = 0;
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break;
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}
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*(p2++) = *(p++);
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}
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}
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static GKeyFile *ga_parse_osrelease(const char *fname)
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{
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gchar *content = NULL;
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gchar *content2 = NULL;
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GError *err = NULL;
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GKeyFile *keys = g_key_file_new();
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const char *group = "[os-release]\n";
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if (!g_file_get_contents(fname, &content, NULL, &err)) {
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slog("failed to read '%s', error: %s", fname, err->message);
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goto fail;
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}
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if (!g_utf8_validate(content, -1, NULL)) {
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slog("file is not utf-8 encoded: %s", fname);
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goto fail;
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}
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content2 = g_strdup_printf("%s%s", group, content);
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if (!g_key_file_load_from_data(keys, content2, -1, G_KEY_FILE_NONE,
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&err)) {
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slog("failed to parse file '%s', error: %s", fname, err->message);
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goto fail;
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}
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g_free(content);
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g_free(content2);
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return keys;
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fail:
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g_error_free(err);
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g_free(content);
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g_free(content2);
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g_key_file_free(keys);
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return NULL;
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}
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GuestOSInfo *qmp_guest_get_osinfo(Error **errp)
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{
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GuestOSInfo *info = NULL;
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struct utsname kinfo;
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GKeyFile *osrelease;
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info = g_new0(GuestOSInfo, 1);
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if (uname(&kinfo) != 0) {
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error_setg_errno(errp, errno, "uname failed");
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} else {
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info->has_kernel_version = true;
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info->kernel_version = g_strdup(kinfo.version);
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info->has_kernel_release = true;
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info->kernel_release = g_strdup(kinfo.release);
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info->has_machine = true;
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info->machine = g_strdup(kinfo.machine);
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}
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osrelease = ga_parse_osrelease("/etc/os-release");
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if (osrelease == NULL) {
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osrelease = ga_parse_osrelease("/usr/lib/os-release");
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}
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if (osrelease != NULL) {
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char *value;
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#define GET_FIELD(field, osfield) do { \
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value = g_key_file_get_value(osrelease, "os-release", osfield, NULL); \
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if (value != NULL) { \
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ga_osrelease_replace_special(value); \
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info->has_ ## field = true; \
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info->field = value; \
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} \
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} while (0)
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GET_FIELD(id, "ID");
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GET_FIELD(name, "NAME");
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GET_FIELD(pretty_name, "PRETTY_NAME");
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GET_FIELD(version, "VERSION");
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GET_FIELD(version_id, "VERSION_ID");
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GET_FIELD(variant, "VARIANT");
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GET_FIELD(variant_id, "VARIANT_ID");
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#undef GET_FIELD
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g_key_file_free(osrelease);
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}
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return info;
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}
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@ -1642,3 +1642,194 @@ GuestUserList *qmp_guest_get_users(Error **err)
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return NULL;
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#endif
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}
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typedef struct _ga_matrix_lookup_t {
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int major;
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int minor;
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char const *version;
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char const *version_id;
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} ga_matrix_lookup_t;
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static ga_matrix_lookup_t const WIN_VERSION_MATRIX[2][8] = {
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{
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/* Desktop editions */
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{ 5, 0, "Microsoft Windows 2000", "2000"},
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{ 5, 1, "Microsoft Windows XP", "xp"},
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{ 6, 0, "Microsoft Windows Vista", "vista"},
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{ 6, 1, "Microsoft Windows 7" "7"},
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{ 6, 2, "Microsoft Windows 8", "8"},
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{ 6, 3, "Microsoft Windows 8.1", "8.1"},
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{10, 0, "Microsoft Windows 10", "10"},
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{ 0, 0, 0}
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},{
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/* Server editions */
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{ 5, 2, "Microsoft Windows Server 2003", "2003"},
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{ 6, 0, "Microsoft Windows Server 2008", "2008"},
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{ 6, 1, "Microsoft Windows Server 2008 R2", "2008r2"},
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{ 6, 2, "Microsoft Windows Server 2012", "2012"},
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{ 6, 3, "Microsoft Windows Server 2012 R2", "2012r2"},
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{10, 0, "Microsoft Windows Server 2016", "2016"},
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{ 0, 0, 0},
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{ 0, 0, 0}
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}
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};
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static void ga_get_win_version(RTL_OSVERSIONINFOEXW *info, Error **errp)
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{
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typedef NTSTATUS(WINAPI * rtl_get_version_t)(
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RTL_OSVERSIONINFOEXW *os_version_info_ex);
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info->dwOSVersionInfoSize = sizeof(RTL_OSVERSIONINFOEXW);
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HMODULE module = GetModuleHandle("ntdll");
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PVOID fun = GetProcAddress(module, "RtlGetVersion");
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if (fun == NULL) {
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error_setg(errp, QERR_QGA_COMMAND_FAILED,
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"Failed to get address of RtlGetVersion");
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return;
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}
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rtl_get_version_t rtl_get_version = (rtl_get_version_t)fun;
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rtl_get_version(info);
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return;
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}
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static char *ga_get_win_name(OSVERSIONINFOEXW const *os_version, bool id)
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{
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DWORD major = os_version->dwMajorVersion;
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DWORD minor = os_version->dwMinorVersion;
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int tbl_idx = (os_version->wProductType != VER_NT_WORKSTATION);
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ga_matrix_lookup_t const *table = WIN_VERSION_MATRIX[tbl_idx];
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while (table->version != NULL) {
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if (major == table->major && minor == table->minor) {
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if (id) {
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return g_strdup(table->version_id);
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} else {
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return g_strdup(table->version);
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}
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}
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++table;
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}
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slog("failed to lookup Windows version: major=%lu, minor=%lu",
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major, minor);
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return g_strdup("N/A");
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}
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static char *ga_get_win_product_name(Error **errp)
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{
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HKEY key = NULL;
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DWORD size = 128;
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char *result = g_malloc0(size);
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LONG err = ERROR_SUCCESS;
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err = RegOpenKeyA(HKEY_LOCAL_MACHINE,
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"SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion",
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&key);
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if (err != ERROR_SUCCESS) {
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error_setg_win32(errp, err, "failed to open registry key");
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goto fail;
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}
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err = RegQueryValueExA(key, "ProductName", NULL, NULL,
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(LPBYTE)result, &size);
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if (err == ERROR_MORE_DATA) {
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slog("ProductName longer than expected (%lu bytes), retrying",
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size);
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g_free(result);
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result = NULL;
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if (size > 0) {
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result = g_malloc0(size);
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err = RegQueryValueExA(key, "ProductName", NULL, NULL,
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(LPBYTE)result, &size);
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}
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}
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if (err != ERROR_SUCCESS) {
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error_setg_win32(errp, err, "failed to retrive ProductName");
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goto fail;
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}
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return result;
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fail:
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g_free(result);
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return NULL;
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}
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static char *ga_get_current_arch(void)
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{
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SYSTEM_INFO info;
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GetNativeSystemInfo(&info);
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char *result = NULL;
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switch (info.wProcessorArchitecture) {
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case PROCESSOR_ARCHITECTURE_AMD64:
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result = g_strdup("x86_64");
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break;
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case PROCESSOR_ARCHITECTURE_ARM:
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result = g_strdup("arm");
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break;
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case PROCESSOR_ARCHITECTURE_IA64:
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result = g_strdup("ia64");
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break;
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case PROCESSOR_ARCHITECTURE_INTEL:
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result = g_strdup("x86");
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break;
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case PROCESSOR_ARCHITECTURE_UNKNOWN:
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default:
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slog("unknown processor architecture 0x%0x",
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info.wProcessorArchitecture);
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result = g_strdup("unknown");
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break;
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}
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return result;
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}
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GuestOSInfo *qmp_guest_get_osinfo(Error **errp)
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{
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Error *local_err = NULL;
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OSVERSIONINFOEXW os_version = {0};
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bool server;
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char *product_name;
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GuestOSInfo *info;
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ga_get_win_version(&os_version, &local_err);
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if (local_err) {
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error_propagate(errp, local_err);
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return NULL;
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}
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server = os_version.wProductType != VER_NT_WORKSTATION;
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product_name = ga_get_win_product_name(&local_err);
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if (product_name == NULL) {
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error_propagate(errp, local_err);
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return NULL;
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}
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info = g_new0(GuestOSInfo, 1);
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info->has_kernel_version = true;
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info->kernel_version = g_strdup_printf("%lu.%lu",
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os_version.dwMajorVersion,
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os_version.dwMinorVersion);
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info->has_kernel_release = true;
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info->kernel_release = g_strdup_printf("%lu",
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os_version.dwBuildNumber);
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info->has_machine = true;
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info->machine = ga_get_current_arch();
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info->has_id = true;
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info->id = g_strdup("mswindows");
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info->has_name = true;
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info->name = g_strdup("Microsoft Windows");
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info->has_pretty_name = true;
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info->pretty_name = product_name;
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info->has_version = true;
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info->version = ga_get_win_name(&os_version, false);
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info->has_version_id = true;
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info->version_id = ga_get_win_name(&os_version, true);
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info->has_variant = true;
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info->variant = g_strdup(server ? "server" : "client");
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info->has_variant_id = true;
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info->variant_id = g_strdup(server ? "server" : "client");
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return info;
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}
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@ -1126,3 +1126,68 @@
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##
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{ 'command': 'guest-get-timezone',
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'returns': 'GuestTimezone' }
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##
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# @GuestOSInfo:
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#
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# @kernel-release:
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# * POSIX: release field returned by uname(2)
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# * Windows: version number of the OS
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# @kernel-version:
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# * POSIX: version field returned by uname(2)
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# * Windows: build number of the OS
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# @machine:
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# * POSIX: machine field returned by uname(2)
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# * Windows: one of x86, x86_64, arm, ia64
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# @id:
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# * POSIX: as defined by os-release(5)
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# * Windows: contains string "mswindows"
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# @name:
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# * POSIX: as defined by os-release(5)
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# * Windows: contains string "Microsoft Windows"
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# @pretty-name:
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# * POSIX: as defined by os-release(5)
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# * Windows: product name, e.g. "Microsoft Windows 10 Enterprise"
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# @version:
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# * POSIX: as defined by os-release(5)
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# * Windows: long version string, e.g. "Microsoft Windows Server 2008"
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# @version-id:
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# * POSIX: as defined by os-release(5)
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# * Windows: short version identifier, e.g. "7" or "20012r2"
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# @variant:
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# * POSIX: as defined by os-release(5)
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# * Windows: contains string "server" or "client"
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# @variant-id:
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# * POSIX: as defined by os-release(5)
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# * Windows: contains string "server" or "client"
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#
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# Notes:
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#
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# On POSIX systems the fields @id, @name, @pretty-name, @version, @version-id,
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# @variant and @variant-id follow the definition specified in os-release(5).
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# Refer to the manual page for exact description of the fields. Their values
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# are taken from the os-release file. If the file is not present in the system,
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# or the values are not present in the file, the fields are not included.
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#
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# On Windows the values are filled from information gathered from the system.
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#
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# Since: 2.10
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##
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{ 'struct': 'GuestOSInfo',
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'data': {
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'*kernel-release': 'str', '*kernel-version': 'str',
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'*machine': 'str', '*id': 'str', '*name': 'str',
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'*pretty-name': 'str', '*version': 'str', '*version-id': 'str',
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'*variant': 'str', '*variant-id': 'str' } }
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##
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# @guest-get-osinfo:
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#
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# Retrieve guest operating system information
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#
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# Returns: @GuestOSInfo
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#
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# Since: 2.10
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##
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{ 'command': 'guest-get-osinfo',
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'returns': 'GuestOSInfo' }
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