qdev-properties-system.c: Allow vlan or netdev for -device, not both

[qemu.git] / util / oslib-posix.c

diff --git a/util/oslib-posix.c b/util/oslib-posix.c
index 4e4b8196beb6b9ad185a824164c2a7df8fbce756..e00a44c86f0271ab4c430639996f5a1c7d129747 100644 (file)
--- a/util/oslib-posix.c
+++ b/util/oslib-posix.c
@@ -40,7 +40,6 @@ extern int daemon(int, int);
       Valgrind does not support alignments larger than 1 MiB,
       therefore we need special code which handles running on Valgrind. */
 #  define QEMU_VMALLOC_ALIGN (512 * 4096)
-#  define CONFIG_VALGRIND
 #elif defined(__linux__) && defined(__s390x__)
    /* Use 1 MiB (segment size) alignment so gmap can be used by KVM. */
 #  define QEMU_VMALLOC_ALIGN (256 * 4096)
@@ -48,16 +47,14 @@ extern int daemon(int, int);
 #  define QEMU_VMALLOC_ALIGN getpagesize()
 #endif
 
+#include <glib/gprintf.h>
+
 #include "config-host.h"
 #include "sysemu/sysemu.h"
 #include "trace.h"
 #include "qemu/sockets.h"
+#include <sys/mman.h>
 
-#if defined(CONFIG_VALGRIND)
-static int running_on_valgrind = -1;
-#else
-#  define running_on_valgrind 0
-#endif
 #ifdef CONFIG_LINUX
 #include <sys/syscall.h>
 #endif
@@ -106,25 +103,29 @@ void *qemu_memalign(size_t alignment, size_t size)
 }
 
 /* alloc shared memory pages */
-void *qemu_vmalloc(size_t size)
+void *qemu_anon_ram_alloc(size_t size)
 {
-    void *ptr;
     size_t align = QEMU_VMALLOC_ALIGN;
+    size_t total = size + align - getpagesize();
+    void *ptr = mmap(0, total, PROT_READ | PROT_WRITE,
+                     MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
+    size_t offset = QEMU_ALIGN_UP((uintptr_t)ptr, align) - (uintptr_t)ptr;
 
-#if defined(CONFIG_VALGRIND)
-    if (running_on_valgrind < 0) {
-        /* First call, test whether we are running on Valgrind.
-           This is a substitute for RUNNING_ON_VALGRIND from valgrind.h. */
-        const char *ld = getenv("LD_PRELOAD");
-        running_on_valgrind = (ld != NULL && strstr(ld, "vgpreload"));
+    if (ptr == MAP_FAILED) {
+        return NULL;
     }
-#endif
 
-    if (size < align || running_on_valgrind) {
-        align = getpagesize();
+    ptr += offset;
+    total -= offset;
+
+    if (offset > 0) {
+        munmap(ptr - offset, offset);
     }
-    ptr = qemu_memalign(align, size);
-    trace_qemu_vmalloc(size, ptr);
+    if (total > size) {
+        munmap(ptr + size, total - size);
+    }
+
+    trace_qemu_anon_ram_alloc(size, ptr);
     return ptr;
 }
 
@@ -134,6 +135,14 @@ void qemu_vfree(void *ptr)
     free(ptr);
 }
 
+void qemu_anon_ram_free(void *ptr, size_t size)
+{
+    trace_qemu_anon_ram_free(ptr, size);
+    if (ptr) {
+        munmap(ptr, size);
+    }
+}
+
 void qemu_set_block(int fd)
 {
     int f;
@@ -148,6 +157,18 @@ void qemu_set_nonblock(int fd)
     fcntl(fd, F_SETFL, f | O_NONBLOCK);
 }
 
+int socket_set_fast_reuse(int fd)
+{
+    int val = 1, ret;
+
+    ret = setsockopt(fd, SOL_SOCKET, SO_REUSEADDR,
+                     (const char *)&val, sizeof(val));
+
+    assert(ret == 0);
+
+    return ret;
+}
+
 void qemu_set_cloexec(int fd)
 {
     int f;
@@ -223,3 +244,10 @@ int qemu_utimens(const char *path, const struct timespec *times)
 
     return utimes(path, &tv[0]);
 }
+
+char *
+qemu_get_local_state_pathname(const char *relative_pathname)
+{
+    return g_strdup_printf("%s/%s", CONFIG_QEMU_LOCALSTATEDIR,
+                           relative_pathname);
+}