* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*/
+
#include "qemu/osdep.h"
#include "qapi/error.h"
-#include "qemu-common.h"
#include "qemu/error-report.h"
+#include "qemu/module.h"
#include "sysemu/hostmem.h"
#include "sysemu/sysemu.h"
#include "qom/object_interfaces.h"
-/* hostmem-file.c */
-/**
- * @TYPE_MEMORY_BACKEND_FILE:
- * name of backend that uses mmap on a file descriptor
- */
-#define TYPE_MEMORY_BACKEND_FILE "memory-backend-file"
-
#define MEMORY_BACKEND_FILE(obj) \
OBJECT_CHECK(HostMemoryBackendFile, (obj), TYPE_MEMORY_BACKEND_FILE)
static void
file_backend_memory_alloc(HostMemoryBackend *backend, Error **errp)
{
+#ifndef CONFIG_POSIX
+ error_setg(errp, "backend '%s' not supported on this host",
+ object_get_typename(OBJECT(backend)));
+#else
HostMemoryBackendFile *fb = MEMORY_BACKEND_FILE(backend);
-#ifdef CONFIG_POSIX
- gchar *path;
-#endif
+ gchar *name;
if (!backend->size) {
error_setg(errp, "can't create backend with size 0");
error_setg(errp, "mem-path property not set");
return;
}
-#ifndef CONFIG_POSIX
- error_setg(errp, "-mem-path not supported on this host");
-#else
- backend->force_prealloc = mem_prealloc;
- path = object_get_canonical_path(OBJECT(backend));
+
+ name = host_memory_backend_get_name(backend);
memory_region_init_ram_from_file(&backend->mr, OBJECT(backend),
- path,
+ name,
backend->size, fb->align,
(backend->share ? RAM_SHARED : 0) |
(fb->is_pmem ? RAM_PMEM : 0),
fb->mem_path, errp);
- g_free(path);
+ g_free(name);
#endif
}
HostMemoryBackendFile *fb = MEMORY_BACKEND_FILE(o);
if (host_memory_backend_mr_inited(backend)) {
- error_setg(errp, "cannot change property value");
+ error_setg(errp, "cannot change property 'mem-path' of %s",
+ object_get_typename(o));
return;
}
g_free(fb->mem_path);
{
HostMemoryBackend *backend = MEMORY_BACKEND(o);
HostMemoryBackendFile *fb = MEMORY_BACKEND_FILE(o);
- Error *local_err = NULL;
uint64_t val;
if (host_memory_backend_mr_inited(backend)) {
- error_setg(&local_err, "cannot change property value");
- goto out;
+ error_setg(errp, "cannot change property '%s' of %s", name,
+ object_get_typename(o));
+ return;
}
- visit_type_size(v, name, &val, &local_err);
- if (local_err) {
- goto out;
+ if (!visit_type_size(v, name, &val, errp)) {
+ return;
}
fb->align = val;
-
- out:
- error_propagate(errp, local_err);
}
static bool file_memory_backend_get_pmem(Object *o, Error **errp)
HostMemoryBackendFile *fb = MEMORY_BACKEND_FILE(o);
if (host_memory_backend_mr_inited(backend)) {
- char *path = object_get_canonical_path_component(o);
-
- error_setg(errp, "cannot change property 'pmem' of %s '%s'",
- object_get_typename(o),
- path);
- g_free(path);
+ error_setg(errp, "cannot change property 'pmem' of %s.",
+ object_get_typename(o));
return;
}
#ifndef CONFIG_LIBPMEM
if (value) {
- Error *local_err = NULL;
- char *path = object_get_canonical_path_component(o);
-
- error_setg(&local_err,
- "Lack of libpmem support while setting the 'pmem=on'"
- " of %s '%s'. We can't ensure data persistence.",
- object_get_typename(o),
- path);
- g_free(path);
- error_propagate(errp, local_err);
+ error_setg(errp, "Lack of libpmem support while setting the 'pmem=on'"
+ " of %s. We can't ensure data persistence.",
+ object_get_typename(o));
return;
}
#endif
oc->unparent = file_backend_unparent;
object_class_property_add_bool(oc, "discard-data",
- file_memory_backend_get_discard_data, file_memory_backend_set_discard_data,
- &error_abort);
+ file_memory_backend_get_discard_data, file_memory_backend_set_discard_data);
object_class_property_add_str(oc, "mem-path",
- get_mem_path, set_mem_path,
- &error_abort);
+ get_mem_path, set_mem_path);
object_class_property_add(oc, "align", "int",
file_memory_backend_get_align,
file_memory_backend_set_align,
- NULL, NULL, &error_abort);
+ NULL, NULL);
object_class_property_add_bool(oc, "pmem",
- file_memory_backend_get_pmem, file_memory_backend_set_pmem,
- &error_abort);
+ file_memory_backend_get_pmem, file_memory_backend_set_pmem);
}
static void file_backend_instance_finalize(Object *o)