From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:36855) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1br3oO-00049g-6B for qemu-devel@nongnu.org; Mon, 03 Oct 2016 10:01:47 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1br3oI-0007M1-TA for qemu-devel@nongnu.org; Mon, 03 Oct 2016 10:01:43 -0400 Received: from mailhub.sw.ru ([195.214.232.25]:8367 helo=relay.sw.ru) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1br3oI-0007KK-H9 for qemu-devel@nongnu.org; Mon, 03 Oct 2016 10:01:38 -0400 From: "Denis V. Lunev" Date: Mon, 3 Oct 2016 17:01:25 +0300 Message-Id: <1475503285-9021-1-git-send-email-den@openvz.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Subject: [Qemu-devel] [PATCH v4 1/1] qga: minimal support for fstrim for Windows guests List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: den@openvz.org, Denis Plotnikov , Michael Roth , Stefan Weil , =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= Unfortunately, there is no public Windows API to start trimming the filesystem. The only viable way here is to call 'defrag.exe /L' for each volume. This is working since Win8 and Win2k12. Signed-off-by: Denis V. Lunev Signed-off-by: Denis Plotnikov CC: Michael Roth CC: Stefan Weil CC: Marc-Andr=C3=A9 Lureau --- qga/commands-win32.c | 97 ++++++++++++++++++++++++++++++++++++++++++++++= ++++-- 1 file changed, 94 insertions(+), 3 deletions(-) Changes from v3: - fixed memory leak on error path for FindFirstVolumeW - replaced g_malloc0 with g_malloc for uc_path. g_malloc is better as we = are allocating string, not an object Changes from v1, v2: - next attempt to fix error handling on error in FindFirstVolumeW diff --git a/qga/commands-win32.c b/qga/commands-win32.c index 9c9be12..cebf4cc 100644 --- a/qga/commands-win32.c +++ b/qga/commands-win32.c @@ -840,8 +840,99 @@ static void guest_fsfreeze_cleanup(void) GuestFilesystemTrimResponse * qmp_guest_fstrim(bool has_minimum, int64_t minimum, Error **errp) { - error_setg(errp, QERR_UNSUPPORTED); - return NULL; + GuestFilesystemTrimResponse *resp; + HANDLE handle; + WCHAR guid[MAX_PATH] =3D L""; + + handle =3D FindFirstVolumeW(guid, ARRAYSIZE(guid)); + if (handle =3D=3D INVALID_HANDLE_VALUE) { + error_setg_win32(errp, GetLastError(), "failed to find any volum= e"); + return NULL; + } + + resp =3D g_new0(GuestFilesystemTrimResponse, 1); + + do { + GuestFilesystemTrimResult *res; + GuestFilesystemTrimResultList *list; + PWCHAR uc_path; + DWORD char_count =3D 0; + char *path, *out; + GError *gerr =3D NULL; + gchar * argv[4]; + + GetVolumePathNamesForVolumeNameW(guid, NULL, 0, &char_count); + + if (GetLastError() !=3D ERROR_MORE_DATA) { + continue; + } + if (GetDriveTypeW(guid) !=3D DRIVE_FIXED) { + continue; + } + + uc_path =3D g_malloc(sizeof(WCHAR) * char_count); + if (!GetVolumePathNamesForVolumeNameW(guid, uc_path, char_count, + &char_count) || !*uc_path)= { + /* strange, but this condition could be faced even with size= =3D=3D 2 */ + g_free(uc_path); + continue; + } + + res =3D g_new0(GuestFilesystemTrimResult, 1); + + path =3D g_utf16_to_utf8(uc_path, char_count, NULL, NULL, &gerr)= ; + + g_free(uc_path); + + if (gerr !=3D NULL && gerr->code) { + res->has_error =3D true; + res->error =3D g_strdup(gerr->message); + g_error_free(gerr); + break; + } + + res->path =3D path; + + list =3D g_new0(GuestFilesystemTrimResultList, 1); + list->value =3D res; + list->next =3D resp->paths; + + resp->paths =3D list; + + memset(argv, 0, sizeof(argv)); + argv[0] =3D (gchar *)"defrag.exe"; + argv[1] =3D (gchar *)"/L"; + argv[2] =3D path; + + if (!g_spawn_sync(NULL, argv, NULL, G_SPAWN_SEARCH_PATH, NULL, N= ULL, + &out /* stdout */, NULL /* stdin */, + NULL, &gerr)) { + res->has_error =3D true; + res->error =3D g_strdup(gerr->message); + g_error_free(gerr); + } else { + /* defrag.exe is UGLY. Exit code is ALWAYS zero. + Error is reported in the output with something like + (x89000020) etc code in the stdout */ + + int i; + gchar **lines =3D g_strsplit(out, "\r\n", 0); + g_free(out); + + for (i =3D 0; lines[i] !=3D NULL; i++) { + if (g_strstr_len(lines[i], -1, "(0x") =3D=3D NULL) { + continue; + } + res->has_error =3D true; + res->error =3D g_strdup(lines[i]); + break; + } + g_strfreev(lines); + } + } while (FindNextVolumeW(handle, guid, ARRAYSIZE(guid))); + + FindVolumeClose(handle); + return resp; } =20 typedef enum { @@ -1416,7 +1507,7 @@ GList *ga_command_blacklist_init(GList *blacklist) "guest-get-memory-blocks", "guest-set-memory-blocks", "guest-get-memory-block-size", "guest-fsfreeze-freeze-list", - "guest-fstrim", NULL}; + NULL}; char **p =3D (char **)list_unsupported; =20 while (*p) { --=20 2.7.4