qemu: reject unknown flags

* src/qemu/qemu_driver.c (qemudOpen, qemuDomainScreenshot)
(qemuDomainXMLFromNative, qemuDomainXMLToNative)
(qemudDomainBlockPeek, qemuCPUCompare, qemuCPUBaseline): Reject
unknown flags.
* src/qemu/qemu_migration.c (qemuMigrationConfirm): Likewise.
(_qemuMigrationCookie, qemuMigrationCookieXMLParse)
(qemuMigrationCookieXMLParseStr, qemuMigrationBakeCookie)
(qemuMigrationEatCookie): Make flags unsigned.
* src/qemu/qemu_domain.h: (qemuDomainDefFormatXML)
(qemuDomainFormatXML): Prefer unsigned flags.
* src/qemu/qemu_domain.c (qemuDomainDefFormatXML)
(qemuDomainFormatXML): Likewise.
(qemuDomainOpenLogHelper, qemuDomainCreateLog): Rename variable.

src/qemu/qemu_domain.c

@@ -1032,7 +1032,7 @@ void qemuDomainObjExitRemoteWithDriver(struct qemud_driver *driver,
 
 char *qemuDomainDefFormatXML(struct qemud_driver *driver,
                              virDomainDefPtr def,
-                             int flags)
+                             unsigned int flags)
 {
     char *ret = NULL;
     virCPUDefPtr cpu = NULL;
@@ -1064,7 +1064,7 @@ cleanup:
 
 char *qemuDomainFormatXML(struct qemud_driver *driver,
                           virDomainObjPtr vm,
-                          int flags)
+                          unsigned int flags)
 {
     virDomainDefPtr def;
 
@@ -1164,7 +1164,7 @@ void qemuDomainObjCheckNetTaint(struct qemud_driver *driver,
 static int
 qemuDomainOpenLogHelper(struct qemud_driver *driver,
                         virDomainObjPtr vm,
-                        int flags,
+                        int oflags,
                         mode_t mode)
 {
     char *logfile;
@@ -1175,7 +1175,7 @@ qemuDomainOpenLogHelper(struct qemud_driver *driver,
         return -1;
     }
 
-    if ((fd = open(logfile, flags, mode)) < 0) {
+    if ((fd = open(logfile, oflags, mode)) < 0) {
         virReportSystemError(errno, _("failed to create logfile %s"),
                              logfile);
         goto cleanup;
@@ -1194,18 +1194,19 @@ cleanup:
 
 
 int
-qemuDomainCreateLog(struct qemud_driver *driver, virDomainObjPtr vm, bool append)
+qemuDomainCreateLog(struct qemud_driver *driver, virDomainObjPtr vm,
+                    bool append)
 {
-    int flags;
+    int oflags;
 
-    flags = O_CREAT | O_WRONLY;
+    oflags = O_CREAT | O_WRONLY;
     /* Only logrotate files in /var/log, so only append if running privileged */
     if (driver->privileged || append)
-        flags |= O_APPEND;
+        oflags |= O_APPEND;
     else
-        flags |= O_TRUNC;
+        oflags |= O_TRUNC;
 
-    return qemuDomainOpenLogHelper(driver, vm, flags, S_IRUSR | S_IWUSR);
+    return qemuDomainOpenLogHelper(driver, vm, oflags, S_IRUSR | S_IWUSR);
 }
 
 

src/qemu/qemu_domain.h

@@ -215,11 +215,11 @@ void qemuDomainObjExitRemoteWithDriver(struct qemud_driver *driver,
 
 char *qemuDomainDefFormatXML(struct qemud_driver *driver,
                              virDomainDefPtr vm,
-                             int flags);
+                             unsigned int flags);
 
 char *qemuDomainFormatXML(struct qemud_driver *driver,
                           virDomainObjPtr vm,
-                          int flags);
+                          unsigned int flags);
 
 void qemuDomainObjTaint(struct qemud_driver *driver,
                         virDomainObjPtr obj,

src/qemu/qemu_driver.c

@@ -804,8 +804,10 @@ static int qemuDomainSnapshotSetCurrentInactive(virDomainObjPtr vm,
 
 static virDrvOpenStatus qemudOpen(virConnectPtr conn,
                                   virConnectAuthPtr auth ATTRIBUTE_UNUSED,
-                                  unsigned int flags ATTRIBUTE_UNUSED)
+                                  unsigned int flags)
 {
+    virCheckFlags(VIR_CONNECT_RO, VIR_DRV_OPEN_ERROR);
+
     if (conn->uri == NULL) {
         if (qemu_driver == NULL)
             return VIR_DRV_OPEN_DECLINED;
@@ -2691,7 +2693,7 @@ static char *
 qemuDomainScreenshot(virDomainPtr dom,
                      virStreamPtr st,
                      unsigned int screen,
-                     unsigned int flags ATTRIBUTE_UNUSED)
+                     unsigned int flags)
 {
     struct qemud_driver *driver = dom->conn->privateData;
     virDomainObjPtr vm;
@@ -2700,6 +2702,8 @@ qemuDomainScreenshot(virDomainPtr dom,
     int tmp_fd = -1;
     char *ret = NULL;
 
+    virCheckFlags(0, NULL);
+
     qemuDriverLock(driver);
     vm = virDomainFindByUUID(&driver->domains, dom->uuid);
     qemuDriverUnlock(driver);
@@ -3890,11 +3894,14 @@ cleanup:
 static char *qemuDomainXMLFromNative(virConnectPtr conn,
                                      const char *format,
                                      const char *config,
-                                     unsigned int flags ATTRIBUTE_UNUSED) {
+                                     unsigned int flags)
+{
     struct qemud_driver *driver = conn->privateData;
     virDomainDefPtr def = NULL;
     char *xml = NULL;
 
+    virCheckFlags(0, NULL);
+
     if (STRNEQ(format, QEMU_CONFIG_FORMAT_ARGV)) {
         qemuReportError(VIR_ERR_INVALID_ARG,
                         _("unsupported config type %s"), format);
@@ -3924,7 +3931,8 @@ cleanup:
 static char *qemuDomainXMLToNative(virConnectPtr conn,
                                    const char *format,
                                    const char *xmlData,
-                                   unsigned int flags ATTRIBUTE_UNUSED) {
+                                   unsigned int flags)
+{
     struct qemud_driver *driver = conn->privateData;
     virDomainDefPtr def = NULL;
     virDomainChrSourceDef monConfig;
@@ -3933,6 +3941,8 @@ static char *qemuDomainXMLToNative(virConnectPtr conn,
     char *ret = NULL;
     int i;
 
+    virCheckFlags(0, NULL);
+
     qemuDriverLock(driver);
 
     if (STRNEQ(format, QEMU_CONFIG_FORMAT_ARGV)) {
@@ -6182,12 +6192,14 @@ qemudDomainBlockPeek (virDomainPtr dom,
                       const char *path,
                       unsigned long long offset, size_t size,
                       void *buffer,
-                      unsigned int flags ATTRIBUTE_UNUSED)
+                      unsigned int flags)
 {
     struct qemud_driver *driver = dom->conn->privateData;
     virDomainObjPtr vm;
     int fd = -1, ret = -1, i;
 
+    virCheckFlags(0, -1);
+
     qemuDriverLock(driver);
     vm = virDomainFindByUUID(&driver->domains, dom->uuid);
     qemuDriverUnlock(driver);
@@ -7258,11 +7270,13 @@ out:
 static int
 qemuCPUCompare(virConnectPtr conn,
                const char *xmlDesc,
-               unsigned int flags ATTRIBUTE_UNUSED)
+               unsigned int flags)
 {
     struct qemud_driver *driver = conn->privateData;
     int ret = VIR_CPU_COMPARE_ERROR;
 
+    virCheckFlags(0, VIR_CPU_COMPARE_ERROR);
+
     qemuDriverLock(driver);
 
     if (!driver->caps || !driver->caps->host.cpu) {
@@ -7282,10 +7296,12 @@ static char *
 qemuCPUBaseline(virConnectPtr conn ATTRIBUTE_UNUSED,
                 const char **xmlCPUs,
                 unsigned int ncpus,
-                unsigned int flags ATTRIBUTE_UNUSED)
+                unsigned int flags)
 {
     char *cpu;
 
+    virCheckFlags(0, NULL);
+
     cpu = cpuBaselineXML(xmlCPUs, ncpus, NULL, 0);
 
     return cpu;

src/qemu/qemu_migration.c

@@ -76,8 +76,8 @@ struct _qemuMigrationCookieGraphics {
 typedef struct _qemuMigrationCookie qemuMigrationCookie;
 typedef qemuMigrationCookie *qemuMigrationCookiePtr;
 struct _qemuMigrationCookie {
-    int flags;
+    unsigned int flags;
-    int flagsMandatory;
+    unsigned int flagsMandatory;
 
     /* Host properties */
     unsigned char localHostuuid[VIR_UUID_BUFLEN];
@@ -446,7 +446,7 @@ error:
 static int
 qemuMigrationCookieXMLParse(qemuMigrationCookiePtr mig,
                             xmlXPathContextPtr ctxt,
-                            int flags)
+                            unsigned int flags)
 {
     char uuidstr[VIR_UUID_STRING_BUFLEN];
     char *tmp;
@@ -580,7 +580,7 @@ error:
 static int
 qemuMigrationCookieXMLParseStr(qemuMigrationCookiePtr mig,
                                const char *xml,
-                               int flags)
+                               unsigned int flags)
 {
     xmlDocPtr doc = NULL;
     xmlXPathContextPtr ctxt = NULL;
@@ -614,7 +614,7 @@ qemuMigrationBakeCookie(qemuMigrationCookiePtr mig,
                         virDomainObjPtr dom,
                         char **cookieout,
                         int *cookieoutlen,
-                        int flags)
+                        unsigned int flags)
 {
     if (!cookieout || !cookieoutlen)
         return 0;
@@ -645,7 +645,7 @@ qemuMigrationEatCookie(struct qemud_driver *driver,
                        virDomainObjPtr dom,
                        const char *cookiein,
                        int cookieinlen,
-                       int flags)
+                       unsigned int flags)
 {
     qemuMigrationCookiePtr mig = NULL;
 
@@ -2564,7 +2564,7 @@ int qemuMigrationConfirm(struct qemud_driver *driver,
                          virDomainObjPtr vm,
                          const char *cookiein,
                          int cookieinlen,
-                         unsigned int flags ATTRIBUTE_UNUSED,
+                         unsigned int flags,
                          int retcode)
 {
     qemuMigrationCookiePtr mig;
@@ -2575,6 +2575,8 @@ int qemuMigrationConfirm(struct qemud_driver *driver,
               driver, conn, vm, NULLSTR(cookiein), cookieinlen,
               flags, retcode);
 
+    virCheckFlags(0, -1);
+
     if (!(mig = qemuMigrationEatCookie(driver, vm, cookiein, cookieinlen, 0)))
         return -1;