static struct property *dlpar_clone_property(struct property *prop,
u32 prop_size)
{
struct property *new_prop;
new_prop = kzalloc(sizeof(*new_prop), GFP_KERNEL);
if (!new_prop)
return NULL;
new_prop->name = kstrdup(prop->name, GFP_KERNEL);
new_prop->value = kzalloc(prop_size, GFP_KERNEL);
if (!new_prop->name || !new_prop->value) {
dlpar_free_property(new_prop);
return NULL;
}
memcpy(new_prop->value, prop->value, prop->length);
new_prop->length = prop_size;
of_property_set_flag(new_prop, OF_DYNAMIC);
return new_prop;
}
static struct property *clone_property(struct property *prop, u32 prop_sz)
{
struct property *new_prop;
new_prop = kzalloc(sizeof(*new_prop), GFP_KERNEL);
if (!new_prop)
return NULL;
new_prop->name = kstrdup(prop->name, GFP_KERNEL);
new_prop->value = kzalloc(prop_sz, GFP_KERNEL);
if (!new_prop->name || !new_prop->value) {
kfree(new_prop->name);
kfree(new_prop->value);
kfree(new_prop);
return NULL;
}
new_prop->length = prop_sz;
#if defined(CONFIG_OF_DYNAMIC)
of_property_set_flag(new_prop, OF_DYNAMIC);
#endif
return new_prop;
}
/*
* The values of properties in the "/__symbols__" node are paths in
* the ovcs->overlay_tree. When duplicating the properties, the paths
* need to be adjusted to be the correct path for the live device tree.
*
* The paths refer to a node in the subtree of a fragment node's "__overlay__"
* node, for example "/fragment@0/__overlay__/symbol_path_tail",
* where symbol_path_tail can be a single node or it may be a multi-node path.
*
* The duplicated property value will be modified by replacing the
* "/fragment_name/__overlay/" portion of the value with the target
* path from the fragment node.
*/
static struct property *dup_and_fixup_symbol_prop(
struct overlay_changeset *ovcs, const struct property *prop)
{
struct fragment *fragment;
struct property *new_prop;
struct device_node *fragment_node;
struct device_node *overlay_node;
const char *path;
const char *path_tail;
const char *target_path;
int k;
int overlay_name_len;
int path_len;
int path_tail_len;
int target_path_len;
if (!prop->value)
return NULL;
if (strnlen(prop->value, prop->length) >= prop->length)
return NULL;
path = prop->value;
path_len = strlen(path);
if (path_len < 1)
return NULL;
fragment_node = __of_find_node_by_path(ovcs->overlay_tree, path + 1);
overlay_node = __of_find_node_by_path(fragment_node, "__overlay__/");
of_node_put(fragment_node);
of_node_put(overlay_node);
for (k = 0; k < ovcs->count; k++) {
fragment = &ovcs->fragments[k];
if (fragment->overlay == overlay_node)
break;
}
if (k >= ovcs->count)
return NULL;
overlay_name_len = snprintf(NULL, 0, "%pOF", fragment->overlay);
if (overlay_name_len > path_len)
return NULL;
path_tail = path + overlay_name_len;
path_tail_len = strlen(path_tail);
target_path = kasprintf(GFP_KERNEL, "%pOF", fragment->target);
if (!target_path)
return NULL;
target_path_len = strlen(target_path);
new_prop = kzalloc(sizeof(*new_prop), GFP_KERNEL);
if (!new_prop)
goto err_free_target_path;
new_prop->name = kstrdup(prop->name, GFP_KERNEL);
new_prop->length = target_path_len + path_tail_len + 1;
new_prop->value = kzalloc(new_prop->length, GFP_KERNEL);
if (!new_prop->name || !new_prop->value)
goto err_free_new_prop;
strcpy(new_prop->value, target_path);
strcpy(new_prop->value + target_path_len, path_tail);
of_property_set_flag(new_prop, OF_DYNAMIC);
return new_prop;
err_free_new_prop:
kfree(new_prop->name);
kfree(new_prop->value);
kfree(new_prop);
err_free_target_path:
kfree(target_path);
return NULL;
}